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In article <58hjua$8sf@dismay.ucs.indiana.edu>, Gregory Loren HansenReturn to Topwrote: > >I saw this on a chalkboard today, could someone point out the error? > >i^2 = sqrt(-1)*sqrt(-1) = sqrt((-1)(-1)) = sqrt(1) = 1 > The overall sign of square roots of complex numbers is arbitrary. So to use a symbol like sqrt() and act like it's a single-valued function, you have to make an arbitrary decision as to which sign should be used in which cases. The operation shown by the second = sign can violate the sign convention, so in general it's not allowed. If you allow sqrt to be a double-valued "function," there's no problem: sqrt(1) = +/- 1, you end up saying -1 = 1 OR -1 = -1. Not the most pleasing result, but at least it's true. Have fun, breed
Subject says it all. I need only pump unit. Preferably low-cost used one. Thanx.Return to Top
: 100130.3306@compuserve.com (Eric Baird) : Methinks that (with SR) we are talking about a cleverly-constructed : flatspace approximation of what are actually curvature effects. That seems not to be the case. The geometry is quite definite: any spacelike slice of an SR coordinate system is euclidean. Flat. Definitely. Definitely euclidean. Definitely flat. -- Wayne Throop throopw@sheol.org http://sheol.org/throopw throopw@cisco.comReturn to Top
singtech@teleport.com (Charles Cagle) wrote: >In article <58ougs$g8q@clarknet.clark.net>, jwalters@clark.net (Jim >Walters) wrote: >> In >>other words, you accused NASA of lying when you had absolutely no way >>of knowing if NASA was telling the truth. Were your claims based on >>anything other than a dislike of NASA? >This is telling. If your antagonist had no way of knowing whether NASA >was telling the truth, as you claim, then neither did NASA. This is illogical! >Which means >your antagonist was on point. No. >NASA as a wasteful govt' agency needs to be eliminated or cut be >severely. Without some justification other than your say so, this is not reasonable. But, some waste happens in all agencies. This is a fact of life. Health and Human Services has waste. Education has waste. NASA has waste. So without some level of knowledge of the extent of waste and the level of accomplishment, the statement above is too sweeping and, if taken as an absolute rule, would require that there be no government at all. Or any other activity either. > Uh what's the problem here, you work for NASA, is that it? I certainly don't. Never have. But, I support them. >-- >C. Cagle >SingTech Information is not knowledge, knowledge is not wisdom, wisdom is not truth, truth is not beauty, beauty is not loveReturn to Top
THE UNIVERSE- HOW IT WORKS- A GRAND UNIFIED THEORY THE UNIVERSE- GRAVITY- A GRAND UNIFIED THEORY WHY a grand unified theory of the universe? Current physics theories do not explain the ocean tides, the photon (particle or wave), gravity, time, mass, or the electromagnetic field. The low tide, not the high tide, is observed directly under the full moon. This contradicts physics texts, the dictionary and encyclopedia definition of tide, which shows a picture of the earth with a bulge of water on the side facing the full moon, and states that the high tide occurs directly under the full moon. This is an error. It is not conceivable that the moon could pull several feet of ocean water around the earth at better than 1000 mph. This would wash away the continents and humanity in a day. The copyrighted theory 1988 A.C.Goodrich; cc023@ freenet.buffalo.edu. explains the tides as a decrease of kinetic energy and volume of the ocean water with the increase of potential energy as the moon direction changes and distance decreases relative to a particular side of the earth's ocean, to maintain a constant total energy of the universe. THE FUNDAMENTAL EQUATION AND PRINCIPLE of the universe is one of constant total energy expressed by the (modified Galileo pendulum-Kepler-Newton- equation by Goodrich) equation: 2 3 T = L / K(M-m) where M is the total energy of the universe, m is the mass-energy in question and T and L are time and distance. This equation is derived from the FUNDAMENTAL EQUATION AND PRINCIPLE of the universe (by Goodrich) 2 2 mL / T + K(M-m)m/L = a constant M. The total of kinetic and potential energy of the universe is a constant M. This grand unified theory defines time, mass, energy, gravity, the photon, other forces, and the electromagnetic field as geometric properties of the universe. See Library of Congress Card Catalog THE UNIVERSE- A UNIFIED THEORY-GOODRICH and ISBN 0-9644267-1-4. ALLEN C. GOODRICH GRAVITY- A GRAND UNIFIED THEORY Gravity, commonly called the force of gravity, is the force equal to the product of the mass m and the acceleration of gravity g. It is the acceleration g of mass m relative to the rest of the universe M that is involved in the force of gravity. The linear acceleration of gravity g is the difference of two accelerations, that of the universe M and that of the mass m which is in question. F = mg = m (G-g) = Km( M/LL - m/LL ) = K m( M-m) / LL.= m L/TT where G = KM/LL ; g = Km/LL ; L = distance and T = time. LL = L squared and TT = T squared. According to the grand unified theory, the mass m is accelerating more slowly than the rest of the universe because its mass-energy density is greater than the mass-energy density of the rest of the universe. The acceleration g is the apparent difference of two volumetric accelerations which are inverse functions of the density of mass-energy, consistent with the fundamental equation and the grand unified theory of the universe. It is this relative acceleration of mass m in all three directions, or it's relative volumetric acceleration Y of mass m, that is sensed as the force of gravity. Y = LLL/TT = K(M-m) = L cubed./ T squared. This is the fundamental equation of the universe. The volumetric acceleration of a mass m relative to the rest of the universe is equal to the value K(M-m). Relative to the rest of the universe, the mass m appears to be contracting, undergoing a force of gravity, due to its smaller relative volumetric acceleration and higher density compared with the rest of the universe. Copyright 1988 Allen C. Goodrich THE ELECTROMAGNETIC FIELD- A GRAND UNIFIED THEORY The electromagnetic and gravitational fields both obey the fundamental equation and grand unified theory of the universe. Unlike the gravitational field, which is a function of the relative volumetric and angular accelerations of the mass m and the effective universe M, the electromagnetic field is a function of the relative volumetric and angular accelerations of the charges of the masses involved. A charge exists only when there is a displacement of the centers of positive and negative angular accelerations. The electromagnetic field photon is the reaction of the rest of the universe to a change of the distance between charges or the distance between positive and negative angular accelerations.. Except for very large mass-energies at very great distances, the electromagnetic field would appear to be much stronger than the gravitational field, because changes of the distance between the centers of acceleration of the negatively and positively charged masses occur outside of the nucleus of the atom. They are therefore more effective relative to the outside universe and are more easily sensed from the universe outside of the atom then are the changes of the density of uncharged masses. Copyright 1988 Allen C. Goodrich See THE UNIVERSE- A GRAND UNIFIED THEORY GRAVITY- A GRAND UNIFIED THEORY ###Return to Top
In article <58bhdr$nv5@panix2.panix.com>, erg@panix.com (Edward Green) writes:< That said, this is just a warm up to some real Return to Top
Subject: Re: Photoluminescent Night Lights
From: Alan \"Uncle Al\" Schwartz
Date: 13 Dec 1996 15:52:54 GMT
quellen@azstarnet.com (Joe Quellen) wrote: >I have a photoluminescent night light that throws a green light for about >(the manufacturer claims) 2 cents a year. It is about 1.5 square inches. >These things have been around for 30 plus years. I wonder if anyone knows why >they aren't made into larger panels for general lighting, since they give >plenty of light. Why can't they be made in large panels or even whole walls? Look at the thing in daylight instead of darkness. Consider lumens/watt and where intensity tops off. Even incandescents do better. -- Alan "Uncle Al" Schwartz UncleAl0@ix.netcom.com ("zero" before @) http://www.ultra.net.au/~wisby/uncleal.htm (Toxic URL! Unsafe for children, Democrats, and most mammals) "Quis custodiet ipsos custodes?" The Net!Return to Top
Subject: Re: WAS: Hot water does freeze faster NOW: BEER in fridge or freezer?
From: "Richard A. Schor"
Date: 13 Dec 1996 16:11:13 GMT
Enough... Why would you want to freeze beer anyway? Here is the next controversy for the NG. A watched pot does not boil!!! Happy holidays y'all... Doug CraigenReturn to Topwrote in article <32B17325.69EA@cyberspc.mb.ca>... > Carl Porter wrote: > > > > Beer or water will get colder faster in the freezer. The higher the difference in > > temperature the faster the heat transfer. A glass of cold water and a glass of hot > > water being placed in the freezer at the same time the cold water will freeze first. > > The hot water will cool down faster (loose more in in the same time) but won't freeze > > first. > > Beer in a bottle is a closed system, water in a glass is an open system. One of the > reasons that hot water is supposed to freeze first (sometimes) is that it evaporates > rapidly while it is hot and the fact that there is now less of it than there is of the > cold water means that under some conditions it will overtake the colder water and freeze > first. This same effect could not help warm beer versus cold beer if they are in closed > bottles. Check out the FAQ for more details. > http://math.ucr.edu/home/baez/physics/hot_water.html > > |++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++| > | Doug Craigen | > | | > | Need help in physics? Check out the pages listed here: | > | http://www.cyberspc.mb.ca/~dcc/phys/physhelp.html | > |++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++| >
Subject: Re: A case against nuclear energy?
From: TL ADAMS
Date: 13 Dec 1996 17:52:55 GMT
redin@lysator.liu.se (Magnus Redin) wrote: > > TL ADAMSReturn to Topwrites: > > > Why, does the truth hurt. The commercial power/weapons production > > are so closely entwined that how can you remove your self from eco > > nightmares like Hanford. > > Its not hard when living in a country that has not built any nuclear > weapons and has a very well run nuclear program. > > Regards, > -- > -- > Magnus Redin Lysator Academic Computer Society redin@lysator.liu.se > Mail: Magnus Redin, Björnkärrsgatan 11 B 20, 584 36 LINKöPING, SWEDEN > Phone: Sweden (0)13 260046 (answering machine) and (0)13 214600 Point well taken, and I will concur. But are you also a country that has had the political will to make the hard decisions about disposal site? Not a rhetorical question, I really don't know. Me, I say put the stuff into the salt domes, alot safer than the crap that is leaking now. Fifty years into the program, and still no perm solution. (Yes, I know that the salt dome place is just an "demonstration" project. And how do we know that you've not built any nukes. Arn't you worried about those shiftless Norgewegioan (sp?), what about those sneaky danes. (GRIN)
Subject: Re: Please Define Townsend's 2nd ionoization coef
From: mfriesel@ix.netcom.com
Date: Fri, 13 Dec 1996 08:19:49 -0700
Michael Supp wrote: > > I need to know how to define Townsend's 2nd ionoization coefficient. I > have the description in words for the coef., but no eqn as to what it >is > equal to. > > There is a paper in Scanning Vol 18, 467-473 (1996) by P. Meredith, A.M. > Donald and B. Thiel "Electro-Gas Interactions in the Enviromental > Scanning Electron Microscopes Gaseous Detector" that derives various > equations that describe theoretically the interactions of electrons with > gases and materials. However the authors fail to define the above > coefficient. I have chased down several papers/books that again deal > with some of the same eqns but none offer a definition of the coef. > The Townsend coefficient is the number of ionizing collisions by an electron per unit path length in the direction of an applied electric field. It seems like a reasonable form for the coefficient would be T = klds where d is the target density, s is the single target ionization cross section for the interaction, k would represent the density-dependent overlap of target cross-sections, and l the mean actual path length travelled by the electron per unit distance travelled in the direction of the applied field.Return to Top
Subject: Re: i^2 = 1?
From: sterner@sel.hep.upenn.edu (Kevin Sterner)
Date: 13 Dec 1996 18:07:11 GMT
In article <58hjua$8sf@dismay.ucs.indiana.edu>, glhansen@copper.ucs.indiana.edu (Gregory Loren Hansen) writes: > > I saw this on a chalkboard today, could someone point out the error? > > i^2 = sqrt(-1)*sqrt(-1) = sqrt((-1)(-1)) = sqrt(1) = 1 Why didn't you just write -1 = sqrt(-1 * -1) = 1? It's simpler and just as meaningful. -- K. ------------------------------------------------------------------------------- Kevin L. Sterner | U. Penn. High Energy Physics | Smash the welfare state! -------------------------------------------------------------------------------Return to Top
Subject: Re: Please Solve an Argument for me...
From: coolhand@Glue.umd.edu (Kevin Anthony Scaldeferri)
Date: 13 Dec 1996 12:35:31 -0500
In articleReturn to Top, Paasschens wrote: >In <58qj3p$1al@news-e2d.gnn.com> glird@gnn.com () writes: > >>Because some of the mass of planet Earth is above you as you fall >>down the hole, the prevailing wisdom is that the force of gravity >>will decrease as a function of how far into the hole you've gone. >>If you check with the Bureau of Weights and Measures (or some >>appropriate agency, i've forgotten which one), you'll find that >>contrary to that opinion, as we descend deeper within Earth's >>surface the force of gravity CONTINUES to increase as a function of >>r². Therefore, the very center of Earth's mass is where g is the >>strongest, and that's exactly where you'll eventually end up after >>bouncing back and forth a few times until you stop there. > >So, instead of believing the previailing wisdom, which everyone with >someknowledge of physics can check by himself, using Newton's laws and >some mathematics, we have to believe some bureau which declared it to be >otherwise. This seems like the decree by one of the states to equal pi >to 3. It is simply not the truth. The Bureau is correct. However, it only has data for a limited distance into the earth's crust. They never claimed anything about the gravitational field further into the earth. See my post about why this is exactly what you expect to happen. Furthermore, are you aware that the National Bureau of Standards (now the National Institute for Standards and Technology) has produced and continues to produce an exceptional amount of outstanding physics reseach. For example, they were one of the groups that produced Bose-Einstein condensation recently. I may be mistaken, but I believe they have also done some work with sonoluminescence. Some of our best data on the spectra of various atoms and molecules is due to NBS/NIST. Where do you think most of the information in CRC and other similar references comes from? Do your homework next time before you post. -- ====================================================================== Kevin Scaldeferri University of Maryland "The trouble is, each of them is plausible without being instinctive"
Subject: Re: Feynman's Inverse Sprinkler Problem...
From: gelfand@lamar.ColoState.EDU (Martin Gelfand)
Date: 12 Dec 1996 15:30:05 -0700
In article <58pfjf$tms@r02n01.cac.psu.edu> ale2@psu.edu (ale2) writes: >In article <58pd7e$32a@sjx-ixn8.ix.netcom.com> >Alan \"Uncle Al\" SchwartzReturn to Topwrites: > > >> At face value one can make an excellent case for the inverse sprinkler >> rotating in either direction. That, plus Feynman's experiment, make the >> direction of rotation obvious. > >Feynman's experiment only gives an upper limit to the effect, love to >see a proof that there is no rotation. Al? Hard to do, since there really _is_ rotation, in the sense opposite that the "forward" sprinkler turns. I saw a beautiful realization of the forward/inverse sprinkler assembled by Robert Berg (or somebody else associated with the demo facility at the University of Maryland, College Park). There is clearly a difference between forward and inverse operation, even if, as in the Maryland demo, the sprinkler is underwater in both modes. In forward operation, when the flow out of the jets is suddenly halted the jets continue to rotate for a short but noticeable time; when the same is done in inverse operation, the jets _suddenly_ stop. Martin Gelfand Dept of Physics, Colorado State
Subject: Re: The absurd debate
From: gwangung@u.washington.edu (R. Tang)
Date: 13 Dec 1996 17:13:54 GMT
In articleReturn to Top, Craig Allen Simons wrote: >On Wed, 11 Dec 1996, Richard F. Hall wrote: > >> Both Science and Religion require faith. Science requires faith in Nature, >> Man, or in some cases God. Even the scientific method and the idea that we >> can learn more than we know requires a bit of faith. Besides faith, all >> humans require: > >Evolution requires a GREAT deal of faith! I am familiar with the theory, Hardly. >got a B in the class, You got very lenient standards. but it is WAY far fetched. To think that something >came from nothing and leave it all up to natural processes which also had >to have a beginning somewhere before the existence of all we know today, >yet how can natural processes come into existence when there are no such >processes to expediate such processes. Quantum physics. This may be difficult for some to >believe, even when they have put their lives into such a system of random >processes and natural selection. If natural selection were true, wouldn't >it stand to reason that the human race would know be extinct? No. > How about >the apes we theoretically evolved from? If we evolved from them, wouldn't >they be considered the inferior species, thus they should die off, No. Fess up; who did you cheat from on those tests? -- Roger Tang, gwangung@u.washington.edu, Artistic Director PC Theatre Editor, Asian American Theatre Revue: http://weber.u.washington.edu/~gwangung/TC.html Declared 4-F in the War Between the Sexes
Subject: How impedance, time and space arise from pi
From: tdp@ix.netcom.com(Tom Potter)
Date: 13 Dec 1996 15:15:50 GMT
This article explains how "pi", the "exponential function", the "impedance of space", time, space, and the other physical properties arise from simple standing waves, and how the "wave function" relates to the physical properties. Reality is basically observed and measured in in terms of "time intervals" and "time periods". Time intervals are most fundamentally associated with radii, and time periods are most fundamentally associated with circumferences. Both of these times are quantized by counting some external reference cycle such as those obtained from atomic clocks. The reference cycles that have been historically used to quantize observations have been "day cycles", "month cycles", "year cycles" and the cycles of spring/mass systems and pendulums. A time period can be defined as: time(period, system) = cycles(reference) ----------------- cycles(of system) A time period is a count of the reference cycles, between each cycle of a system under observation, as observed against some assumed stable background, which is needed to determine when a cycle is complete. A time interval can be defined as: time(interval) = cycles(reference) ----------------- cause to effect A time interval is a count of the reference cycles, between when a cause is observed in a body, and when an effect is observed in the system the body is associated with. A constant k1, associated with an isolated entity, can be defined as: k1 = circumference / radius In the case of a perfectly symmetrical, isolated entity, k1 is equal to "2 pi". A constant k2, associated with an isolated system, can be defined as: k2 = exp(k1) In the case of a perfectly symetrical, isolated system, k2 is equal to exp(2 pi) or 535.488.... Whereas the physical expression of k1 is "2 pi", or the ratio of circumference and radius, the physical representation of k2 is the ratio of two interaction distances, or more fundamentally two interaction times multiplied by a universal space per time constant "C". These distances can be radii, diameters or circumferences as k2 is, like "2 pi", observed as a dimensionless ratio of distances. An easy to visualize physical representation of k2 would be the two radii ( Or diameters or circumferences ) of a coaxial transmission line. A transmission line with a charactistic impedance of 376.733.. ohms matches the impedance of space. The physical condition that satisfies the "impedance of space" can be defined as: Z = Z0 * ln(exp(2 pi)) ------------------ 2 pi Now it is obvious that ln(exp(2 pi)) equals "2 pi" but this equation is more familiar to electrical engineers as: Z = k * ln( outer diameter / inner diameter ) where the ( outer diameter / inner diameter ) for a 376 ohm transmision line equals 535.488, and k equals ( Z0 / "2 pi" ) or 59.959.. This is commonly expressed as: Z = 59.959 ln( outer diameter / inner diameter ) As far as I know, this is the first explanation of how these two constants arise. ( 59.488 and 535.733 ) Note that Z0 is simply a constant used to scale the numeric value of impedance, and if Z0 were set equal to one, then the electrical properties could be defined from the equation: Z = ln(exp(2 pi)), or one, for pure space, and Z = ln( outer diameter / inner diameter ) otherwise. Now, I assert that fundamental reality consists of standing waves. Ratios of these standing waves are observed as period times when associated with cycles ( circumferences), and as interaction times when associated with time intervals ( radi). Distance is fundamentally an interaction time which is multiplied by a constant to differentiate it from period time. This constant is of course "C", which serves no purpose other than to differentiate between the two fundamental kinds of time. Mass is simply a property used to differentiate between two interacting bodies. Humans perceive conserved "objects" having mass, varying in homogenous "media" such as time, space and magnetic flux. In the simplist case, we perceive the object Earth varying in media without considering that the Earth's media is an expression of the Sun's mass. In fact, the media associated with objects is a more complete and fundamental expression of objects than mass. This can be expressed as: mass(A) = (time(interaction B)*C)^3 ----------------------------- ( time(period) / 2 pi )^2 * G mass(B) = (time(interaction A)*C)^3 ----------------------------- ( time(period) / 2 pi )^2 * G Note that "C" is used to express interaction time as a distance, while "G" is a constant used to differentiate between object A and object B, or more fundamentally between media A and media B, such media fundamentally being standing waves. Of course, all other physical properties can be defined in terms of the time, distance and mass thus defined, but the most fundamental expression of the physical properties is: property(X) = tan(A)^L * tan(B)^M * time(period)^N * C^(L+M) / G^O where: L, M, N and O are integers C = the speed of light G = the universal gravitational constant tan(A) = orbital velocity(A) / C tan(B) = orbital velocity(B) / C In other words, what we perceive as velocities are basically tangent functions associated with what we perceive as interacting bodies. Although I mentioned that I would explain how the "wave function" and quantum mechanics relates to all this, rather than make this article too long, I suggest that anyone who is interested in pursuing this, or wants more graphical details on these concepts visit my Web site, and read some of the articles. Read "Potter explains all" on my main menu, and some of the articles under "Random thoughts". In these articles, I assert that Special Relativty is basically a tangent identity: tan(A+B) = tan(A) +- tan(B) ----------------- 1 +- tan(A) * tan(B) and that spectrum of hydrogen-like ions is basically another trig identity: sin(A)^2 + sin(B)^2 = 1 which after a little juggling is expressed as: v = Rydberg's constant * ( 1/M^2 - 1/N^2 ) The bottom line is that all this stuff ( reality ) is just standing waves and geometry. Tom Potter http://pobox.com/~tdpReturn to Top
Subject: Velocity ofa bullet
From: Jared James
Date: Fri, 13 Dec 1996 13:05:44 -0800
Hello!! A friend and I were reading the paper the other day, and noticed a artical about two guys who were out frog gigging and on the way back their headlights went out due to a blown fuse. Looking for something to put in the fuse holder, they found a .22 round on the floor, decided it would work and put the round in the fuse holder. A few min later, the round dischared and hit the driver in the groin area. Yes, this really did happen!! :) Now the question that we have talked about is this: What was the velocity of the bullet? He thinks that the round was travling at the same speed as if it were fired from a rifle or a hand gun. I don't think so. However, neither one of us are physic majors, but I think that it should not be that hard to prove that the round was not going that fast. I think it has to do something with the expanding gases in the rifle chamber that gives the bullet the high velocity. He says that has nothing to do with it! I know this sounds trival, but thought somebody might get a kick out of the story and help us find out how fast was the round was going. Please respond either here or at jjames69@mail.idt.net. Thanks!! Jared JamesReturn to Top
Subject: Re: GRAVITY- HOW IT WORKS
From: Richard Mentock
Date: Fri, 13 Dec 1996 14:59:30 -0500
ALLEN GOODRICH wrote: > > THE UNIVERSE- HOW IT WORKS- > A GRAND UNIFIED THEORY > > THE UNIVERSE- GRAVITY- A GRAND UNIFIED THEORY > > WHY a grand unified theory of the universe? > > Current physics theories do not explain the ocean tides, > the photon (particle or wave), gravity, time, mass, or > the electromagnetic field. > > The low tide, not the high tide, > is observed directly under the full moon. This contradicts > physics texts, the dictionary and encyclopedia definition of > tide, which shows a picture of the earth with a bulge of water > on the side facing the full moon, and states that the high tide > occurs directly under the full moon. This is an error. One more time. The tides follow the moon, not the full moon (whatever *that* means, since the full moon occurs only about once a month). The moon does not *pull* the bulge around the world, it merely lessens (or increases) the gravitational force directed towards the center of the Earth. -- D. mentock@mindspring.com http://www.mindspring.com/~mentock/index.htmReturn to Top
Subject: Re: Time travel experiment
From: Anonymous
Date: Fri, 13 Dec 1996 13:52:39 -0600
General Question: One thing that has interested me is a question concerning general relativity and time travel. Everyone knows that when an object is sent down a black hole or when an object is accelerated to near the speed of light and then sent down a gravity well, that interesting phenomenon occurs due to general relativity. It has occured to me that this might be near to impossible to do experimentally when you are dealing with large objects such as persons, baseballs, or rockets, because it is very difficult to realistically accelerate such objects near the speed of light. (or to find a near black hole, none having presented themselves) When you are dealing with protons or cathode rays, however, it might be possible to accelerate such particles to near the speed of light and then let the gravitational pull of the earth or the moon or the like accelerate it a little more, enabling experimental observation of what may occur when a particle hits the theoretical equivalent of an event horizon. You could have a satellite shoot some cathode rays, or mabye a proton stream, at very near to c at the moon or earth, and send a sensor down the stream to observe the particles on their path, or, you might even use an accelerator to get a stream of eletrons or protons going at extremely close to c, and then using magnets to bend the stream down and have gravity work over a small distance to find out what then happens. Probably a satellite that did the first experiment would be relatively famous, and thus I would have heard about it. It might be that the experiment with the particle accelerators might have already been done, or someone may be doing it now. Question: Is such an experiment technically feasible? Has any one done it? What do you think might be the results of such an experiment? -X P.S. - added to sci.physics -XReturn to Top
Subject: Re: Room Temperature Superconducting Powder
From: lois wyatt
Date: 12 Dec 1996 01:44:58 GMT
Can this really be true? Check out the www.msnbc.com web site for more detail? They quote a Tc of 77 F! I wondered if this were a misprint for 77 K, which is the boiling point of nitrogen. Didn't really appear so from the story. Looks like the hottest thing since cold fusion.Return to Top
Subject: Re: Abian's concept
From: "Michael D. Painter"
Date: 13 Dec 1996 07:51:48 GMT
Which would mean that time can move backwards. Which explains all the problems with Star trek and time travel. Every time Picard ordered Earl Gray hot he created mass which moved time back. I would have tried a good Darjeeling. Alexander V. FrolovReturn to Topwrote in article ... > Professor Alexander Abian wrote: > Date: 10 Dec 1996 00:00:41 GMT > Organization: Iowa State University, Ames, Iowa > Message-ID: <58i979$9jo@news.iastate.edu> > > <(A) A certain m Abian units of Cosmic mass is (perhaps) irretrievably > < lost to move Time forward T Abian units > < > -------------------------------------------------------------------------- > < ABIAN MASS-TIME EQUIVALENCE FORMULA m = Mo(1-exp(T/(kT-Mo))) Abian units. > < .... > > This is fine concept and I belive that sometime it would be found some > experimenal proof of it. To understand the practical sense of Abian's idea it > is necessary to see the whole cycle of mass-time and time-mass transformations > of Universe. I think that it is normal closed system and M -> T like T -> M. > > > > > --- > Alexander V. Frolov, P.O.Box 37, St.-Petersburg, 193024 Russia > Tel:7-812-2747877 > > --- > Alexander V. Frolov, P.O.Box 37, St.-Petersburg, 193024 Russia > Tel:7-812-2747877 >
Subject: Re: Please Define Townsend's 2nd ionoization coef
From: amiller@nmsu.edu (A. MILLER)
Date: 13 Dec 1996 15:17:57 GMT
Michael Supp (supp@ridgefield.sdr.slb.com) wrote: : I need to know how to define Townsend's 2nd ionoization coefficient. I : have the description in words for the coef., but no eqn as to what it is : equal to. If we are thinking of the same thing ("gamma", the ratio of the average number of secondary electrons emitted froma cathode for each new positive ion formed in gas {Townsend discharge}), then I think that there exists no equation giving the value of gamma in terms of "fundamental quantities". My old book "Theory of Gaseous Conduction and Electronics" by Maxwell and Benedict (McGraw Hill, 1941) represents gamma as a fucntion of (F/p) - where F is field strength ("E") and p is pressure. See their figure 8-12, page 284 if you can find the book in your library. Or look for the BIG gaseous electronics book by L. Loeb. The coefficient is also discussed in Sanborn C. Brown's book ("Introduction to Electrical Disharges in Gases", John Wiley & Sons, 1966), page 119 and following. August MillerReturn to Top
Subject: Re: Velocity ofa bullet
From: Alan \"Uncle Al\" Schwartz
Date: 13 Dec 1996 19:59:04 GMT
Jared JamesReturn to Topwrote: >Hello!! > >A friend and I were reading the paper the other day, and noticed a >artical about two guys who were out frog gigging and on the way back >their headlights went out due to a blown fuse. Looking for something to >put in the fuse holder, they found a .22 round on the floor, decided it >would work and put the round in the fuse holder. A few min later, the >round dischared and hit the driver in the groin area. Yes, this really >did happen!! :) Look at the thickness of the conductors in your auto fuses, and how well thermally insulated the fusable link is. Compare this with the mass of brass and lead in a .22 cartridge out in the air. Can you say "urban legend?" 1) under normal circumstances, while not an especially clever thing to do, the round would not be perceptibly heated by the current. 2) if there were a big short in the system, you'd expect it to manifest itself otherwise. So, the round goes off. >Now the question that we have talked about is this: What was the >velocity of the bullet? He thinks that the round was travling at the >same speed as if it were fired from a rifle or a hand gun. I don't >think so. However, neither one of us are physic majors, but I think >that it should not be that hard to prove that the round was not going >that fast. I think it has to do something with the expanding gases in >the rifle chamber that gives the bullet the high velocity. He says that >has nothing to do with it! The round is driven down the rifled barrel by the pressure of expanding gases behind it. Consider what happens if you leave the powder out of a center fire round - the bullet makes it maybe a half inch into the barrel. (Firing the next round is ill-advised). If the round is not contained in the breech then it merely explodes into shrapnel. I doubt the lead bullet would do more than 60-100 mph, tops. The brass might be a little sloppy. Get an ammo table from Remington or Winchester. A .22 handgun with its gap between the cylinder and the barrel, and short barrel, has a substantially lower muzzle velocity than the same round fired from a rifle. If you are firing .22s you might as well buy a slingshot and stop waking the neighbors. (The previous sentence does not apply to a skilled wetworker.) >I know this sounds trival, but thought somebody might get a kick out of >the story and help us find out how fast was the round was going. Please >respond either here or at jjames69@mail.idt.net. -- Alan "Uncle Al" Schwartz UncleAl0@ix.netcom.com ("zero" before @) http://www.ultra.net.au/~wisby/uncleal.htm (Toxic URL! Unsafe for children, Democrats, and most mammals) "Quis custodiet ipsos custodes?" The Net!
Subject: Re: GRAVITY- HOW IT WORKS
From: lrmead@ocean.st.usm.edu (Lawrence R. Mead)
Date: 13 Dec 1996 18:49:30 GMT
ALLEN GOODRICH (105516.1052@CompuServe.COM) wrote: : THE UNIVERSE- HOW IT WORKS- : A GRAND UNIFIED THEORY : : THE UNIVERSE- GRAVITY- A GRAND UNIFIED THEORY : : WHY a grand unified theory of the universe? : : Current physics theories do not explain the ocean tides, : the photon (particle or wave), gravity, time, mass, or : the electromagnetic field. [bigskip] Where do they all come from ??? -- Lawrence R. Mead (lrmead@whale.st.usm.edu) ESCHEW OBFUSCATION ! ESPOUSE ELUCIDATION ! http://www-dept.usm.edu/~scitech/phy/mead.htmlReturn to Top
Subject: Re: Please settle a bet for me
From: lrmead@ocean.st.usm.edu (Lawrence R. Mead)
Date: 13 Dec 1996 18:45:36 GMT
abert@cinternet.net wrote: : A friend of mine swears that he was taught this. A bullet fired from a gun held perfectly horizontal, would hit the : ground at exactly the same time as a bullet (the same mass) held at the same hight as the gun and dropped straight : down. I told him he was nuts. Am I right or wrong? Thanks, abert@cinternet.net Ignoring air resistance, he is absolutely correct. -- Lawrence R. Mead (lrmead@whale.st.usm.edu) ESCHEW OBFUSCATION ! ESPOUSE ELUCIDATION ! http://www-dept.usm.edu/~scitech/phy/mead.htmlReturn to Top
Subject: Re: Gravity - Just a dent
From: kfischer@iglou.com (Ken Fischer)
Date: Fri, 13 Dec 1996 19:50:03 GMT
Simon Read (bbroder@ftc.gov) wrote: : claybyrd@ix.netcom.com(Elizabeth Barrett) wrote: : >> Have you heard of centrifugal force? : >> do you believe in it? : One common confusion: the stone is somehow in equilibrium because : its radius (string length) doesn't change. This is false. The : stone IS NOT IN EQUILIBRIUM. It's following a curved path, so the : forces on it are not balanced. Similarly for a planet's orbit : around the sun. : Simon s.read cranfield ac uk : \/\/\/ Don't use the address in my header: it's wrong!!! \/\/\/ You Sir, are correct about the stone, but wrong about the planets. :-) Obviously you are partial to Newton. :-) Up until the middle of this century, both centrifugal and centripetal force were considered valid terms, then some professor or cute teacher decided that centrifugal force was simply an effect of inertia, and decided that it was incorrect to call it a force, but centrifugal effect was ok. Things have not been the same since then, the cuteness of claiming the term "centrifugal force" invalid, lends to the conversation, but detracts from the physics. Planets and objects in orbit have their centers of mass in inertial motion, and are not, therefore, experiencing centrifugal or centripetal force, they are simply following the geodesic of their centers of mass. :-) Ken FischerReturn to Top
Subject: Re: WAS: Hot water does freeze faster NOW: BEER in fridge or freezer?
From: "Michael D. Painter"
Date: 13 Dec 1996 08:11:53 GMT
Carl Porter <3CAP@MSG.TI.COM> wrote in article <32AE4A0E.564D@MSG.TI.COM>... > Beer or water will get colder faster in the freezer. The higher the difference in > temperature the faster the heat transfer. A glass of cold water and a glass of hot > water being placed in the freezer at the same time the cold water will freeze first. > The hot water will cool down faster (loose more in in the same time) but won't freeze > first. That's what Scientific American said. Until they tried it.Return to Top
Subject: A easy question for nuclear engineers...
From: Miguel
Date: 13 Dec 1996 18:57:24 GMT
How many Megatons would be necessary to destroy the world? Just like the Star Wars movie... -- ************************ * Miguel J. Jimenez * O O O O * ------------- * O O -|- * krilim@ibm.net * Seville / \ ************************ 2 0 0 4 Summer OlympicsReturn to Top
Subject: Re: freedom of privacy & thoughts
From: caesar@copland.udel.edu (Johnny Chien-Min Yu)
Date: 13 Dec 1996 16:33:29 -0500
From jdaniels@isd.net Fri Dec 13 15:39:33 1996 Date: Tue, 10 Dec 1996 19:14:57 -0600 From: Jason DanielsReturn to TopSubject: Re: freedom of privacy & thoughts Alan Yu wrote: >>It's now also apparent to this invidual that her >>three-year-old son is on the receiving end of externally induced >>auditory input. >What a god awfully long way of saying the son HEARD SOMETHING. >Think about it, if you have internally induced auidtory input, it's >typically phrased as and "auditory hallucination". >Jason Daniels Accusing other as insane or hallucination without evidence is the trademark of mind control operators or cooperators. Why is your words so similar as them? Before I answer your question, let's review the original report on this case first. (attachment)--Microwave Harassment & Mind Control Experimentation" by Julliane McKinney =========================================================== Another individual, during a telephone conversation, was told by an employee of a local power company that , if she value the lives of her children, she would drop the her opposition to the company's installation of high power lines. Since receiving that threat, the individual 11-year-old daughter has been reduced to extrrement of illness which cannot be diagnosed. It's now also apparent to this invidual that her three-year-old son is on the receiving end of externally induced auditory input. ================================================================= I would ask you that what is the meaning of the threatened words- which is told by an employee of a local power company during the telephone conversation. "If her value the lives of her children, she would drop the opposition to the company's installation of high power lines". The anbove words has obviously proven that the vicytim's children revceived the intentional harassment from mind control equipments. Now, I would further show readers the information of the microwave voices equipments in our society below. (attachment) ==================================================== (New World Order & ELF Psychotronic Tyranny by C. B. Baker) The 4\94 SCIENTIFIC AMERICAN reported: "Federal researchers are now investigating a broad array of non-lethal devices including...LOW-FREQUENCY 'INFRASOUND' GENERATORS POWERFUL ENOUGH TO TRIGGER NAUSEA OR DIARRHEA,...electronics-disrupting pulses of electromagnetic radiation..and biological agents that can chew up crops." To help promote the U.N. global dictatorship, Soviet KGB scientist have recently been working at various U.S. advanced weapons facilities, such as Lawrence Liverpool and Los Alamos Laboratories. In November, 1993, a three day top-secret non-lethal weapons conference took place in the Applied Physics Laboratory at Johns Hopkins University in Maryland. The meeting was attended by Attorney General Janet Reno, numerous scientist, military weapons experts, intelligence officials from state and local police departments. The main purposes of the meeting was to prepare leading law enforcement officials for the use of psychotronic mind-control weapons. * Amongst the subjects covered at the conference were "RADIO-FREQUENCY WEAPONS, HIGH POWERED MICROWAVE TECHNOLOGY, ACOUSTIC TECHNOLOGY" (used to transmit subliminal voices into a victims head), VOICE SYNTHESIS, and APPLICATION OF EXTREME FREQUENCY ELECTROMAGNETIC FIELDS TO NON-LETHAL WEAPONS." Col. John B. Alexander, Program Manager for Non-Lethal (psychotronic) Defense, Los Alamos National Laboratory, served as PRESENT DAY, U.S.Government use of electromagnetic weapons was described conference chairman. in the Oct-Nov., 94 NEXUS MAGAZINE: "Directed-energy weapons currently being deployed include, for example, a micro-wave weapon manufactured by Lockheed-Sanders and used for a process known as 'Voice Synthesis' which is REMOTE BEAMING OF AUDIO (i.e., VOICES OR OTHER AUDIBLE SIGNALS) DIRECTLY INTO THE BRAIN OF ANY SELECTED HUMAN TARGET. This process is also known within the U.S. Government as "Synthetic Telepathy ( Microwave voices device -- Alan Yu note)." This psychotronic weapon was demonstrated by Dr. Dave Morgan at the Novem- ber, 1993 Non-Lethal weapons conference. =============================================================== The above information not only has proven that US government has developed such kinds of microiwave voices equipments in the society, but also proves that the local law enforcement units should havec such kinds of microwave-voices equipments in hands. Therefore, comparing the threatened words of the local power copany employee with above equipments, it does prove that the mind control operators or cooperator can use the microwave-voices equipment to harass the child. That's why the child can end of this kind of harassment after the victim (child's mother) drop her opposition to the installation of the high power lines. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Alan Yu The first objective of mind control organization is to manipulate people's lives in order to eliminate their opponents or enemies secretly (die as if natural cause). The mind (machine) control system is the national security system of Taiwan from late of 1970s and should be the same in US or lots free countries (In Taiwan, the mind machine is translated as "Psychological Language Machine." In the Mandarin sounds as "Sin_Lee_Yue_Yan_Gi") Accusing other as insane without evidence is the "trademark" of mind control organization. (If any law enforcement officer declare anyone as "insane" and the social security department do not put these individual in the welfare program as diable person, then it only represent a kind of political suppression or false accusation to discredit someone. That' because the local law enforcement is the basic unit of mind control) The shorter the lie is, the better it is. So, the liar can avoid inconsistency and mistakes that other people can catch. Only the truth will triumph over deception and last forever. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Subject: Re: GRAVITY- HOW IT WORKS
From: nurban@csugrad.cs.vt.edu (Nathan M. Urban)
Date: 13 Dec 1996 14:31:20 -0500
In article <58s8fq$nbb$2@thorn.cc.usm.edu>, lrmead@ocean.st.usm.edu (Lawrence R. Mead) wrote: > ALLEN GOODRICH (105516.1052@CompuServe.COM) wrote: > : THE UNIVERSE- HOW IT WORKS- > : A GRAND UNIFIED THEORY > : > : THE UNIVERSE- GRAVITY- A GRAND UNIFIED THEORY > : > : WHY a grand unified theory of the universe? > : > : Current physics theories do not explain the ocean tides, > : the photon (particle or wave), gravity, time, mass, or > : the electromagnetic field. > [bigskip] > Where do they all come from ??? The woodwork. (I don't know _how_ many times people have explained why his argument about the tides is wrong. What was that Crackpot Index question, the one about adhering to their original statements despite careful correction?) -- Nathan Urban | nurban@vt.edu | Undergrad {CS,Physics,Math} | Virginia TechReturn to Top
Subject: Re: BASIC geometry problem
From: Peter Mott
Date: Sun, 08 Dec 1996 12:01:49 -0500
Shawn Maddock wrote: > > Here is the problem: > > Below is a tiling of a plane by squares. What regular n-gons will tile > the plane? What non-regular convex n-gons will tile the plane? What > combinations of regular polygons will tile the plane? What cominations > of any type of polygon will tile the plane? Generalize to any type of > polygon. > | | | > -+-+-+- > | | | > -+-+-+- > | | | > > The regular polygons are easy: 3, 4, and 6 sided n-gons will tile. The > part I need help on are the generalizations, and any patterns you find > in any of the sub-questions. Of course, an equation would be wonderful, > as long as it is explained. My experience with these issues came about when I had to carry out Voronoi and Delannay tessellations of 3-space. You might check back into the literature on these subjects, as I am sure the geometry was worked out long ago, probably the last century--I believe that both Voronoi and Delaunnay were 19th century mathematicians. Lets say you have a collection of points in 2-space that form a certain structure--call these points "atoms" to distinguish them. A Voronoi polygon (polyhedra in 3D) is the regon is space nearest to an atom. If you connect any two points that share a common boundary, the boundary between the VP will be the perpendicular bisector of the line connecting these two atoms. If you connect all neighboring atoms, you get a network of triangles (tetrehedra in 3D)--these are the Delaunnay triangles. The center of any circle drawn through the three atoms of a Delaunnay triangle is equidistant to all three atoms, an hence forms a corner of the Voronoi polygons. A Voronoi polygon can have any number of sides, but as you can see, the basic unit of tessellation is the Delaunnay triangle. Getting back to your problem, The basic issue here is the corner, where three or more polygons meet. Since the intersection of any three polygons form a corner, if FOUR (or more) polygons form a corner, you have a special case, a degeneracy. Let us take the two cases separately. If there are no degeneracies, I recall that there is a mathematical theorem that states that the number of sides must average to six, for any configuration. My experience with random structures proved this to be true. This is obvious because the number of lines meeting at the corner are three, dividing into three angles of an average of 120 degrees, and the inner angle on a hexagon is also 120 degrees. If there are degeneracies, as in tiling 2-space with squares, you take 360 divided by the number of lines that meet to get the inner angle of the polygon. E.g., 4 lines ==> 360/4=90==>square as the inner angle of a square is 90 degrees; 360/6=60==>triangle etc. The situations is considerably more complicated in three dimensions. FWIW Peter MottReturn to Top
Subject: Re: Please settle a bet for me
From: kfischer@iglou.com (Ken Fischer)
Date: Fri, 13 Dec 1996 21:42:30 GMT
Anthony Potts (potts@cms6.cern.ch) wrote: : On 13 Dec 1996 abert@cinternet.net wrote: : > A friend of mine swears that he was taught this. A bullet fired from : > a gun held perfectly horizontal, would hit the : > ground at exactly the same time as a bullet (the same mass) held at : > the same hight as the gun and dropped straight : > down. I told him he was nuts. Am I right or wrong? : > Thanks, abert@cinternet.net : > : If you were talking about a situation where you could neglect the air : resistance, they would indeed hit at the same time, since both are being : pulled down with the same force by gravity. Newtonian gravitation sure was taught good, but I know you have studied General Relativity where there is no "force" of gravity. :-) : If, however, you include air resistance, the travelling bullet falls : slightly more slowly. : Anthony Potts Or falls quicker because it doesn't go as far. :-) Ken FischerReturn to Top
Subject: Re: Feynman's Inverse Sprinkler Problem...
From: hedberg1@slb.com
Date: Fri, 13 Dec 1996 15:41:03 -0600
In article <58qf15$p91@csugrad.cs.vt.edu>, nurban@csugrad.cs.vt.edu (Nathan M. Urban) wrote, among other things: > I seem to recall seeing a number of articles on the inverse sprinkler > problem in the American Journal of Physics, though I didn't read them. > You might want to look there. I think that if we start out with the assumption that angular momentum must be conserved, the direction of rotation in each case (blowing and sucking) is clear. Experiment and math agree that rotation is in opposite directions. -------------------==== Posted via Deja News ====----------------------- http://www.dejanews.com/ Search, Read, Post to UsenetReturn to Top
Subject: Re: Spectroscopy of olive oil
From: "Peter J. Barnes"
Date: 13 Dec 1996 12:13:27 -0800
In article <58pi23$d35@agate.berkeley.edu>, B.Hamilton@irl.cri.nz writes [unnecessary quoted text deleted by moderator] >There is bound to be information on Olive Oil properties >in the Journal of the American Oil Chemists Society, and there >probably is an Olive Oil Research centre lurking around Europe [...] Contact: International Olive Oil Council, Principe de Vergara 154, E-28002, Madrid, Spain Tel: +34-1-563-0071 Fax: +34-1-563-1263 Peter Barnes Publisher Lipid Technology -- Peter J. Barnes PJ Barnes & Associates, PO Box 200 Bridgwater TA7 0YZ, England. Tel: +44-1823-698973 Fax: +44-1823-698971 E-mail: editor(a)pbarnes.demon.co.ukReturn to Top
Subject: Create ball lightning w/ kitchen microwave oven?
From: rbarnett@alcor.usc.edu (rbarnett)
Date: 13 Dec 1996 12:17:32 -0800
I was doing some research into ball lightning and came across an interesting experiment. I found this piece of material from the Journal of Geophysical Research (Vol. 99, No. D5, Pages 10679-81, May 20, 1994). The article is entitled "Laboratory-produced ball lightning," by the author Robert K. Golka Jr. Within the article he discusses methods of short-circuiting 60-cycle currents across copper and aluminum electrodes under water. However, at the top of the article is an 'Abstract' section, and he writes: "...Although I am hoping for some other types of ball lightning to emerge such as strictly electrostatic-electromagnetic manifestations, I have been unlucky in finding laboratory provable evidence. Cavity-formed plasmodes can be made by putting a 2-inch burning candle in a home kitchen microwave oven. The plasmodes float around for as long as the microwave energy is present." I am wondering if anyone has tried this for themselves. I have not yet had a chance to put a lit burning candle in a kitchen microwave oven and turn on the power. Has anyone done this before... do actual plasmodes of ball lightning float around within the inside of the oven? If so, does anyone have an explanation to why this occurs? Thanks much, please respond via e-mail to my address. rbarnett@usc.edu P.S.> If you destroy your kitchen microwave oven by testing out this experiment; I am not responsible for any damages.Return to Top
Subject: Re: faster than light travel
From: curran@remove_this.rpi.edu (Peter F. Curran)
Date: 13 Dec 1996 18:34:05 GMT
In article <32b3dd69.10131602@news.demon.co.uk>, malcolm@pigsty.demon.co.uk (Malcolm McMahon) writes: >On 11 Dec 1996 22:22:42 GMT, curran@remove_this.rpi.edu (Peter F. >Curran) wrote: >>Heh, I thought of this a while ago... To affect our "time >>velocity" we need to exert a force along the time axis, perhaps >>by sending some matter in the time direction opposite to which >>we want to go. To slow down, we throw something else along our >>direction of travel, coming to a halt. By this reasoning, if >>we try to "force" the earth into the past, by equal and opposite >>reaction we would accelerate towards the future. Of course, the >>earth, being much more massive, is undetectably affected by >>this proceedure. This silliness goes on and on.... >> > >There are serious problems with the whole concept of "time velocity", >let alone extending the notion to the idea that analogous quanitities >to kinetic energy and momentum are likely to be meaningful. > >Velocity (as we know it) is defined as the rate of change of postion >_with respect to time_. It's the angle of the world line of an object >in spacetime w.r.t. to the observer's time axis. > Hey, first off the above was meant as humor, (it something I thought of as a kid)! No fair attempting to apply hard science to a joke! >As soon as you describe our relationship with time in terms of >velocity you face the question: The rate of change of curent time with >respect to what? No familiar dimension will do. In relativity you can >compare "time rates" between different intertial frames but that is >only a comparison. The "velocity" it produces is a dimensionless >factor that cannot be seen in terms of momentum. Before you know where >you are you've created not just one, but an infinite series of time >dimensions each needed to define the movement of "now" in the previous >one. Dunne, thought he could handle that but it's really not very >convincing. > >As I understand it Cisco is suggesting something along the lines of >entropy as a baseline for measuring the velocity of time but I think >too many assumptions about time are tied up in the concept of entropy >to avoid all kinds of circularity in such an approach. > >My own feeling is that the "motion" of "now" is tied up with the >interface between consciousness and matter and so can never be >objectively measured. You move fast through time merely by falling >asleep. If there's an independant variable in the motion of now it not >a continous one but rather the accumulation of acts of observation and >will. > >---------------------------------+---------------------------------- >I was born weird: This terrible | Like Pavlov's dogs we are trained >compulsion to behave normally is | to salivate at the sound of the >the result of childhood trauma. | liberty bell. >---------------------------------+---------------------------------- >Malcolm My feeling is that time is a property of the universe and it couldn't give a damn whether we were conscious or not! A person's notion of time is too dependent on his "meat machinery" to be accurate, which is why we employ simpler mechanical devices to measure time. - Pete CurranReturn to Top
Subject: TSI 9831 Fibre-Optic Probe
From: John Creaven
Date: 13 Dec 1996 12:40:35 -0800
Hi, Got a problem with the above optics. Has anyone experienced difficulty in aligning the back-scattered light on to the receiving optics. It has been suggested that I should check using a fibre alignment checkcable TSI 1098416. Problem is I don't have one, and need to borrow one can anyone help ? John CreavenReturn to Top
Subject: Re: Creation VS Evolution
From: skrishna
Date: Thu, 12 Dec 1996 12:17:29 -0800
Bob Casanova wrote: > > On Fri, 13 Dec 1996 08:33:18 GMT, in sci.skeptic, wf3h@enter.net (bob > puharic) wrote: > > >"Todd K. Pedlar"Return to Topwrote: > > > > > >>There's not much of an argument there; I'm not so sure you can say that > >>evolution is consistent or inconsistent with other sciences. Evolution > >>has not much of anything to do with physics, astronomy, etc., > >>whatsoever. > > > >they are all sciences...and all know that the earth and the universe > >is billions of years old, which is what the creationists doubt. sounds > >pretty consistent to me. > > Not to mention that most of the support for evolution comes from such > disciplines as biology and comparative anatomy (sorry if that's the > wrong term, but I'm an amateur). The fossil record so beloved of the > creationists is only part of the evidence; evolution would not be > disproven if the fossil record didn't even exist. > > > > > (Note followups, if any) > > Bob C. > > "No one's life, liberty or property is safe while > the legislature is in session." - Mark Twainjhj
Subject: Re: The Physics of Absolute Motion
From: glhansen@copper.ucs.indiana.edu (Gregory Loren Hansen)
Date: 13 Dec 1996 22:59:31 GMT
In articleReturn to Top, Charles Cagle wrote: >In article > , Gregory >Loren Hansen wrote: >>I'm not sure I can at all agree with your disagreement. I think your >>standards are too high. > >Then I must reply that I think yours are too low. > >> For what you want, it seems you would need >>complete knowledge of the universe before you can even begin to formulate >>theories. > >You are right. I think those who make significant advances have a sort of >Gestalt experience or vision of the universe. You can't get to the whole >through the parts but instead one becomes aware of the wholeness of it all >(perhaps through what you might refer to as a 'mystical' experience) and >then attempts to fit the parts into the implicate form or idea of the >universe of which having received it one forever after carries with him as >a pattern. This is the a priori form which becomes the cognitive filter >through which the rest of the universe becomes coherent. I think you're only half right, here. Physics is as much a creative endeaver as anything else, and great advances were often caused by flashes of insight that were likened to a mystical experience. As you suggested, they can find a new way of looking at the universe, and suddenly their problem makes sense. But the scientists in question were bringing together facts and experience they had been mulling over for some time. That's not to say they become aware of the wholeness of the entire thing. Just a new, sensible view of the problem they're working on. If it's anything more than that, it must just be useless to the unprepared mind. >>I also need to pull out my cosmic blueprints. It seems that you think a >>theory isn't "correct" unless that's how the universe "really" works. >>But the Nature is a black box. We can build theories and models that >>mimic Her, but we can never peer at the cosmic blueprints to see if >>that's how She really works. > >Of course then we must disagree here because what I am referring to above >as the implicate form you are referring to as the 'Cosmic Blueprint'. I >think that all of the universe is a witness to this 'Cosmic Blueprint'. >It is the essence of beingness. To be successful on this quest a person >must be physicist, philosopher, and priest (PPP) all rolled into one - and >his physics, philosophy and religion must all be one thing. But how will you know if you've hit the correct "implicate form", if that's analogous to my Cosmic Blueprints? The only way is to make some predictions and test them, to see if observation matches your theory. What if two or more theories, starting from different assumptions, make identical predictions, how can you choose which one is "correct"? You can't. You can make an essentially arbitrary decision based on things like simplicity, beauty, and personal prejudice. But the only objective test of which one is "more correct" is experiment. And what if you've experimentally narrowed the race to your favorite theory? You can never be certain someone won't devise a better theory (in the matter of being simpler or more unifying), or that some experiment will uncover disasterous data proving you're wrong. You can never know if you have the "right" theory. >> A nice example is gravity, it has been >>described as curvature of space-time and also as a non-Newtonian force. >>They'll both give you the right answers, but we can't say one is right >>and the other is wrong. Probably they're both wrong in some way, but we >>may never know. > >Of course. This is agreeable to me except the part where you posit that >'we may never know'. If all predictions are identical and experimental evidence does not favor one over the other, your only recourse is into metaphysics, seeking meaning beyond the physics. But the reason Plato's metaphysics are still discussed in modern philosophy is because when you have multiple metaphysical theories, there is no objective way to choose one over the other. Even some criterion like "simplicity" is a value judgement here. Metaphysics has its place in physics. Look at the Copenhagen conference, for an example. They examined the question of what quantum mechanics really means. Many worlds, hidden variables, the role of the observer... All we really know is there is a direct correlation between what you predict with QM and what you observe. >>All you can really say about special relativity is that it deals with >>macroscopic unaccelerated motion. And you can do some melding with >>relativity and quantum mechanics. Within those limits, it has never >>given us a wrong answer. Never. That's why it can and should continue >>to be used with confidence, until we start to see some contradictions >>with reality. > >Well we're talking about the Cartesian idea of tearing down structures >because of some fault in their foundations. Even Descartes recognized the Tear down as much as you want, but the equations must remain intact because within their realm of validity, they are correct. >>> >Now tell me why you think black >>> >hole theory is bullshit, and why there is no evidence of black holes. >>> >>> It is a matter of philosophical and epistemological preferences which >>> cause me to conclude that physics which isn't grounded in a consistent >>> philosophy isn't worth spit. >> >>I think this is where you and mainstream physics parts ways. Philosophy >>and epistemology have their place as guides to research and >>interpretation. But in the end there is one and only one final word; >>evidence. > >Please. Evidence you say? Evidence is nothing more than the >interpretation of data with regard to a particular paradigm. >Stochastically, a million men might have blood on their hands at the >moment a particular murder takes place but there may be a million reasons >(one for each) why none of them did the crime. Um... I don't catch your meaning here. >> The concept of the black hole was around for a long time, >>simply defined as how small a gravitating body has to get before the >>escape velocity is equal to the speed of light. > >This is loaded with assumptions one of which is that gravity is a >continuous force which is applied constantly in time and space to all the >particles of a mass. This is loaded with the assumptions of Newtonian physics. We both know they're wrong, but they're also easy to use, easy to think about, and very useful within their realm of validity. >> If the escape velocity >>is greater than light, than light won't escape. And if light is the >>speed limit of the universe, that means nothing will escape. Very >>simple. > >With the assumptions I mentioned before and above it turns out not to be >simple at all. So when is escape velocity not an escape velocity? > >General relativity made some considerable refinements to black >>hole theory, but the basic idea is still the same. For direct evidence >>of black holes we only have a few X-ray sources and gravitating bodies that >>match predictions of how black holes should behave (or rather, how the >>things surrounding them should behave). > >There you go. Making statements such as: 'for *direct* evidence...' as if >somehow the emission of x-rays from a location in the cosmos makes the >case. It doesn't, so it is not *direct* evidence in the same way that a >direct frontal photo of a robber from a video tape of a convenience store >hold up makes the case for the district attorney. We don't have direct evidence of electrons, either! Have you ever *seen* an electron? Of course not! You may have seen evidence of the flow of electrical fluid, such as sparks, or simple electromagnets you may have made as a kid. There is some evidence of quantized electric charges, like Millikan's experiment or the picture on your monitor. But you can't pick up an electron with a tweezers, look at it through a magnifying glass, and say "Aha! I see it is a discrete unit!" Strictly speaking, philosophically, even the evidence of your senses is indirect. You see a photo of a robber. The light entering your eye forms a pattern that your brain interprets as the likeness of the man sitting next to you. When shown the camera that took this picture, you make the assumption that the pattern of light the lens focuses onto the paper is the image of whatever it was pointing at, invisibly captured by the chemicals on the film. You assume that this image is made visible through the process of developing the film. And what's more, you assume someone didn't fire up Photoshop and doctor two or more pictures to make the one you see. Does this man have a twin brother? Is he the spittin' image of a visitor from Peoria? All evidence requires interpretation. A photograph is especially convincing because we've learned through long experience that the camera never lies (even though sometimes it does). And we likewise build confidence in our theories when they're consistently on-target. >>But we also have tests of the >>foundation of black hole theory, general relativity. The basic process goes something like "If our theories are correct, and black holes exist, then we should see this type of X-ray emission, which can't be accounted for by anything else we know of. We should see this distribution of Doppler shifts in light from objects orbitting a black hole and this pattern of light caused by a gravitational lensing, which cannot be caused by a less dense object." Then turn our augmented eyes to the heavens and see what we can find. To disprove, for example but this process also applies in general, black holes, you must break the chain of reasoning somewhere. You must say these X-rays could have been caused by something else, and give a convincing argument. Or show that the underlying theory is wrong. Or show that the data was somehow corrupted. Philosophical inclinations do not hold much weight in physics unless they're backed by data and theory. >>They've measured >>things like the precession of Mercury around the sun, the bending of >>light as it passes a star, the gravitational time dilation of us compared >>to a clock in orbit. General relativity hasn't been nearly as thoroughly >>tested as special relativity, but it's important to note that it has been >>tested and never proven wrong. > >Just as the atheist submits that he has never been proven wrong. There's an important difference. An atheist cannot test his belief. He cannot say "If God does not exist, this will be the inevitable result" and see if it's true. He cannot say "If God exists then this must happen, but it doesn't, so He doesn't." At least, I have never seen a condition that doesn't break down under examination. In general relativity they can say "If Mercury does not precess in this fashion, then GR is wrong." But it does. They can say "If light does not bend around the sun in this manner, then GR is wrong." But it does. They can say "If a clock in orbit does not run faster than a clock on earth, then GR is wrong." But it does, and it turns out you need to account for that in the most accurate navigational satellites. They could say "If GR is wrong then we won't measure a Doppler shift when we shine light from the top of the tallest tower we can find." But it is shifted. Just because GR hasn't been tested as thoroughly as special relativity doesn't mean it hasn't been tested at all. >>What all this means is no matter what theory you can come up with, no >>matter where it comes from, it must match the verified predictions of >>general relativity, at least in the realm where GR is applicable. > >Actually a theory with more heft will predict things which GR could not >while subsuming data which was thought to confirm GR under its own wing. You're going to have put a lot of tricky math in there somewhere. If it makes the same predictions in the realm that GR has been tested in, those must somehow reduce to the same final equations. >>> My arguments are not very sophisticated so they should be easy to follow. >>> I have several reasons but among them is the idea that the universe is >>> innately interconnected, each particle to every other particle. >> >>Connected how? The electromagnetic and gravitational interactions are >>already recognized. > >Through the vector potentials, which themselves compose the substance of >particles, since you ask. Through momentum space relationships extended >in ways I have not seen described like the implicit idea that even prior >to any interaction two particles have equal and opposite momentum. You can always show this by a change of reference frame. It's a useful trick. >This >implies that in a universe of n particles each particle has n-1 momentum >states or moves nonclassically along n-1 trajectories at all times. The >emergence of a single trajectory in the classical sense to the exclusion >of n-2 others is mediated by the act of measurement or observation (which >is the same thing). The other states are still there, just unobservable >in principle. I didn't catch this. What do you mean by "momentum state"? >>What if black holes can be experimentally verified? > >Look, I'm not saying there aren't points in the cosmos, indeed, within >each and every bit of matter, where time ceases to be manifested in a >linear manner. In fact, I would argue that such is the case. So what I >would be saying is that a black hole isn't formed by the principles that >are normally thought to form them and hence black holes are not black >holes in the way that black holes are normally thought to be black holes. Uh... is there another way? >I think it is presumptious to name manifestations of gravity when gravity >itself is so poorly understood. How else are we going to talk about them? >The point is that everything which depends upon a continuum is necessarily >wrong even if it appears to yeild reasonably correct answers. People can >get the right answers, you know, for the wrong reasons. Maybe I should ask what you mean by a continuum. Is it just the well-known approximation of treating electric charge as continuous, water as a fluid, and so on? Or is there something more? >I'm familiar with it but if Kuhn was so insightful don't you suppose he >should have been able to bring about a revolution himself? Why? He was writing *about* scientific revolutions, not trying to create one himself. Except in the area of the philosophy of science, where he is well known and debated. >> On the other hand, maybe we simply don't have the body of >>knowledge and experience to launch the unifying theory that you want. >>Maybe that has to wait for a hundred more years of research. > >Here you are presupposing that enough data will eventually imply the end. >There's never enough because the complexity of the theories which can be >devised (but which have no relationship whatsoever to the real physics) is >endless. Ever heard the phrase "ever learning but never coming to the >knowledge of the truth"? I must have misunderstood you in some way. I don't think I've ever said anything that disagrees with that paragraph, but I thought that was exactly what you're trying to do. >>And I don't see physics as a quest to duplicate the Cosmic Blueprints. >>That's an impossible goal. I see physics as a way to reduce the >>phenomena of Nature into a formal structure that can be manipulated to a >>variety of useful ends. I think you're more into metaphysics. > >Don't be snobbish now. If I am into 'metaphysics', which I suspect came >off of your tongue rather pejoratively, then from a historical >perspective, I'm in damn good company. Grab an encyclopedia and look up "metaphysics". "Beyond physics". It examines the underlying structure of reality, and how that structure is manifested in what we see. Metaphysics is not very concerned with empirical evidence, but in sneaking a peak at those Cosmic Blueprints. The physicist, on the other hand, is more interested in how well the data match his equations. The interpretation, the metaphysics, comes later at his conveniance. >>They were also experts of contemporary theory. I can't think of even one >>person who revolutionized any field, even non-science, who didn't >>understand the contemporary views. > >The point I make above fits well here because there is no end to possible >complexities of theories and who should be expected to first become >immersed in falsehood before they can grasp the truth. There is another >pathway to the truth which can avoid the errors. Well, some folks call it The Holy Bible... >>Eh? I thought you were designing a theory a priori. > >No. I don't design the theory so much as find confirmation for it. I'm >not the designer. Oh. Who designed it? >Well, let's go beyond your challenge and start by talking about something >simple like Coulomb's law. > >I would offer the following challenge to get us going: > > Find a single experiment on record anywhere which confirms that > Coulomb's law holds true for fundamental charged particles which do > not have relative motion with respect to one another. > > p.s. (Hint: you won't find one.) > >The reason is simple; Coulomb's law is a 'special case' which is >applicable only to fundamental charged particles which have a significant >relative motion with respect to one another. Quantifying this: Only when I thought it was because you can't measure Coulomb's law by holding two elementary particles stationary and measuring the force between them. How can you do that? Applying QM to the problem, this experiment can't be done even in principle because if we were to hold two particles completely still we would have no idea where they even were, and the act of measuring their position would give them velocity. >charged particles have a 'common' de Broglie wavelength which is less than >the interparticle distance will their interaction conform to Coulomb's >law. I believe quantum electrodynamics already deals with this matter. When particles get close enough the force starts to deviate from the 1/r^2 form. >Now before you reject this out of hand, I suggest that this analysis >actually will solve more problems in physics than it may, at first, appear >to produce. Out of it can proceed all known forces (weak interaction, >strong, Cooper Pairing, Bose-Einstein Condensate attraction/dispersion >force) even including a quantum gravity without large objects. Well, I'm going to have to let you work on it yourself, because finals are coming up, and then I'm going home for winter break. I'm leaving my computer at school because it would cost too much to bring it home and back. So if you don't write back by Tuesday, I won't see you again until the middle of January at the earliest. But it's been interesting. Thanks. -- "Knock off all that evil!"
Subject: Re: Should a theory explain why?
From: Marty Tysanner
Date: 13 Dec 1996 12:47:19 -0800
[Moderator's note: this article was posted at least twice to sci.physics.research. Let me take this opportunity to remind people that when you post an article to sci.physics.research, even if it is also crossposted to other groups, it will need to be read by the moderator before it appears. Please don't think something has gone wrong and repeatedly post the same article. - jb] wetboy wrote: > It's nice when a theory explains all of the good things one > learns in first year journalism: who, what, where, when, why, > how, and so what; but, in my view, the only requirement of > a good scientific theory is that it make specific, > quantifiable, valid, and unambiguous predictions. I agree with you. The requirement of a good scientific theory is that it makes quantifiable, unambiguous predictions that are testable and borne out by experiment. What I was trying to argue was that a complete theory _should_ (not "must") do more than just classify and quantify phenomena; it should also also give the underlying mechanisms that form the foundation of the theory. These mechanisms will either take the form of even more fundamental theories or of postulates. In the case of fundamental postulates, there is no physical "why" because fundamental postulates are the starting point for physical theory rather than an intermediate point. I apologize if I am being overly abstract. To hopefully make it more clear, let me briefly describe what I consider the desirable form of a final, complete theoretical framework. At the foundation layer, there will be a set of fundamental postulates. There is no "why" for these; they are merely the minimal set of independent statements about properties (or whatever) of matter that are necessary as a starting point for the most basic, fundamental physical theories. The fundamental theories will transform these postulates into predictions about the behavior and properties of the most fundamental forms of matter (properties and behavior that has not been explicitly postulated, that is). Less fundamental theories will build on these fundamental theories, but the fundamental theories will form the "why" for them. In the end, the complete theoretical framework should be (in my view) a kind of inverted pyramid of theories, with the fundamental postulates at the bottom. Of course, the framework must make quantifiable, unambiguous predictions that are testable and borne out by experiment. Obviously, we are a long way from this kind of "ideal" complete theory. Probably many (if not most) physicists would question whether this is even achievable. Are there answers to the "why" behind electric charge, inertia, space curvature by mass, quantum uncertainty, spin and mass of elementary particles, electric and magnetic fields, and so on, or can these properties only be postulated? Time will (hopefully) tell. So, what is the reason behind my discussion of "why" in this thread? It is not to criticize the progress of physical knowledge; many smart people have made and continue to make a great amount of progress in understanding the physical world. In fact, I believe that most if not all physicists would be very happy to have as complete a theoretical framework as I outlined above. Probably much more than the general population, scientists want to know the "why" behind the way things are. I don't think it would be fair for me or others to demand from science those explanations it does not yet have. What I am questioning is the presumption of those people who think we are getting close to a final physical theory ("all we need to do is unify gravity with quantum mechanics and explain some elementary particle masses") but are not prepared to explain the "why", or "how" if you prefer, of basic properties of matter. Or if they believe that basic material properties must be postulated and hence cannot be explained, I question why they have not made a convincing case for it based on logic rather than presumption. I see no shame in admitting "We don't know yet." This seems far preferable to saying "We can't know why" or "It is not important." While still in school I had a physical chemistry professor who seemed to typify this attitude. In more than one lecture he said "We can never know why..." It seemed to me he was taking the current state of knowledge and extrapolating it to what is actually possible. What he was really doing was making a fundamental postulate about what is possible and stating it as a fact. Anybody can state postulates, but does merely stating them make them true? I likely will not pursue this thread much more at this time. It seems most of the responses are not really digging in to what I am trying to get at, which is a discussion of how far we can or should go in explaining physical phenomena with a complete theory. Of course, if some people want to have a logical discussion of that, it remains an interesting topic to me. But merely exchanging opinions without giving reasons does not seem particularly enlightening. Regards, MartyReturn to Top
Subject: Re: A easy question for nuclear engineers...
From: Alan \"Uncle Al\" Schwartz
Date: 13 Dec 1996 20:03:51 GMT
MiguelReturn to Topwrote: >How many Megatons would be necessary to destroy the world? Just like the Star About one milli-tonne would be sufficient if it were detonated within 10 feet of you. If you wanted to bust the planet you'd need input enough energy to disassemble its mass against gravitational potential. It ain't gonna happen. Figure out the mass of, say, the first mile depth of the lithosphere and accelerate it to 7 miles/second. Them's a lot of joules, and you've hardly started. -- Alan "Uncle Al" Schwartz UncleAl0@ix.netcom.com ("zero" before @) http://www.ultra.net.au/~wisby/uncleal.htm (Toxic URL! Unsafe for children, Democrats, and most mammals) "Quis custodiet ipsos custodes?" The Net!
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Byron Palmer