Newsgroup sci.physics 203841

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Subject: Re: When did Nietzsche wimp out? (was: Sophistry 103) -- From: moggin@bessel.nando.net (moggin)
Subject: Re: Gravity and Electromagnetism:Unified Field Theory -- From: odessey2@ix.netcom.com(Allen Meisner)
Subject: Re: How Much Math? (Was: Re: How much to invest in such a writer?) -- From: lew@ihgp167e.ih.att.com (-Mammel,L.H.)
Subject: Re: Science and Aesthetics [Re: When did Nietzsche wimp out?] -- From: Vance Maverick
Subject: Re: Does drafting slow the front rider? -- From: jbrandt@hpl.hp.com (Jobst Brandt)
Subject: Re: When social critics wimp out ... (was: Nietzsche) -- From: rafael cardenas
Subject: Re: PEACE VACCINE (or more precisely, PEACE GENETIC-VACCINE) -- From: rayvt@comm.mot.com (Ray Van Tassle)
Subject: Re: When will the U.S. finally go metric? -- From: Paul Skoczylas
Subject: Re: On Religion: Can we at least agree on this truth? -- From: natalie@col.hp.com (Natalie Ramsey)
Subject: Help!PLEASE!-Klothiold Loops -- From: smurfy@vcn.bc.ca (Roch Ripley)
Subject: Re: MRI limiting factor on resolution? -- From: peter@hpl.hp.com (Peter Webb)
Subject: Re: Hermeneutics and the difficulty to count to three... -- From: rvien@dreamscape.com (Robert Vienneau)
Subject: Re: Sophistry 103 (was: I know that!) -- From: candy@mildred.ph.utexas.edu (Jeff Candy)
Subject: Re: r constant -- From: vorwerkp@ohsu.edu
Subject: Re: [Fwd: Re: The Conscious Mind -- David Chalmers] -- From: David Yeo
Subject: Re: How Much Math? (Was: Re: How much to invest in such a writer?) -- From: Noel Smith
Subject: Re: Creation VS Evolution -- From: myers@netaxs.com (Paul Myers)
Subject: Re: Hermeneutics and the difficulty to count to three... -- From: weinecks@mail1.sas.upenn.edu (Silke-Maria Weineck)
Subject: Re: Electrical resistance of vacuum (was Electrical arcing) -- From: gcodner@lightlink.com (Jerry Codner)
Subject: Questions about Engeneering Physics -- From: jes203@is5.nyu.edu (Slither)
Subject: Re: Sophistry 103 (was: I know that!) -- From: zeleny@oak.math.ucla.edu (Michael Zeleny)
Subject: Re: Can Science Say If God Exists? -- From: nebula@spacelab.net
Subject: Re: r constant -- From: vorwerkp@ohsu.edu
Subject: Re: Curvature of Space-Time -- From: nurban@csugrad.cs.vt.edu (Nathan Urban)
Subject: Re: Electrical resistance of vacuum (was Electrical arcing) -- From: "Paul B.Andersen"
Subject: Re: r constant -- From: vorwerkp@ohsu.edu
Subject: ANNOUNCE: Australian Minerals Exploration Technologies CRC -- From: David O'Brien
Subject: Re: Sophistry 103 (was: I know that!) -- From: zeleny@oak.math.ucla.edu (Michael Zeleny)
Subject: Re: a falling penny -- From: "Trinition"
Subject: Re: Project question -- From: kfischer@iglou.com (Ken Fischer)
Subject: Re: Q: Temperature of sky -- From: kfischer@iglou.com (Ken Fischer)
Subject: Re: PEACE VACCINE (or more precisely, PEACE GENETIC-VACCINE) -- From: "Bill Lee"
Subject: Re: Hermeneutics and the difficulty to count to three... -- From: moggin@bessel.nando.net (moggin)
Subject: Re: friction-coefficient of -- From: Lyman@cwcas.demon.co.uk (Lyman Chan)
Subject: Re: r constant -- From: "Trinition"
Subject: Re: Breakdown of Einstein's theories. -- From: "Trinition"
Subject: Re: Can Science Say If God Exists? -- From: st86m@Rosie.UH.EDU (slobbering skeleton)
Subject: Re: Sophistry 103 (was: I know that!) -- From: moggin@bessel.nando.net (moggin)
Subject: Re: what causes electromagnetic energy to flow ? -- From: "Trinition"
Subject: Re: EASY MONEY -- From: ale2@psu.edu (ale2)

Articles

Subject: Re: When did Nietzsche wimp out? (was: Sophistry 103)
From: moggin@bessel.nando.net (moggin)
Date: 23 Oct 1996 18:05:50 -0400
Ken MacIver wrote:
[...]
>>>What does it say to you about science when both sides to an
>>>irreconcilable difference plead their case through citations to
>>>science?
"RICHARD J. LOGAN" :
>>It tells me that even lay people recognize that science has provided
>>unambiguously positive solutions to problems in the past and that, by
>>implying scientific evidence supports their position (and not the
>>position of people on the other side of the issue), they hope to
>>convince the uncommitted masses of the correctness of their cause.
Anton Hutticher Exactly.
>This is why eg. moggin constantly uses phrases like "newton was wrong,
>as wrong as ptolemy" or "If "some of the unstated assumptions used in
>classical mechanics have turned out to be wrong," then quite clearly
>there _was_ something to cast doubt on" without mentioning that he
>uses "wrong" etc in an extremely weird way, which would not be
>expected by lay people. They hear "wrong" and think: Gee,it doesnt
>work, lets switch to say astrology.
	You are, well, wrong.  In the latter example, you're not
just quoting me -- you're quoting me quoting Richard Logan.  Now,
I forget exactly, but isn't Richard a scientist of some kind or 
other?  Maybe even a physicist?  In any case, you didn't raise an
objection to the expression when _he_ used it -- it only _became_
objectionable to you when you thought that it was coming from me.
	So much for the criticism you've been aiming my way.  It
finally becomes clear that Newton can be wrong when you say so,
but not when I do -- blaspheming is permitted, but only to some
people, and when performed with the necessary rituals.  It's o.k.
for Rich to say that "some of the unstated assumptions used in
classical mechanics have turned out to be wrong," but when you
believe I'm saying it, it's suddenly improper.  So the truth has
outed.  (Not that I hadn't guessed, much as I had surmised the
nature of Mati's grin.)
	But maybe now we can look at other, more interesting
questions.  For example, it is true (as I'd think from the above)
that you're mainly concerned with defending the esteem of science
as an institution?  You seem disturbed by the notion that people
might even _consider_ placing their faith somewhere else, and your
argument is political: don't say anything that might put thoughts
in their heads.  _That's_ the criterion you seem to apply.
	It would follow that you argue with me not because I dare
approach the mysteries with being properly initiated, but because
someone listening to me might begin to lose confidence in the high
priests.  I can at least put you at ease regarding my intentions:
my interest in swaying the "uncommited masses" is quite small.
-- moggin
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Subject: Re: Gravity and Electromagnetism:Unified Field Theory
From: odessey2@ix.netcom.com(Allen Meisner)
Date: 23 Oct 1996 23:14:24 GMT
In 
mmcirvin@world.std.com (Matt McIrvin) writes: 
>
>In article <54jd0v$7pk@dfw-ixnews7.ix.netcom.com>,
>odessey2@ix.netcom.com(Allen Meisner) wrote:
>
>>     But we do know the dimensions of the nucleus, don't we? If this
is
>> so, it shouldn't be such a great step to apply general relativity. I
am
>> not sure how the equation would look, but you would probably not
need
>> the gravitational constant, since you are treating the mass in terms
of
>> its energy equivalent.
>
>You need the gravitational constant even then. But that's not the real
>problem.
>
>> Since the Tensor in general relativity refers to
>> the energy distribution, why couldn't we just substitute the
appropiate
>> values into the equation?
>
>The problem is that the energy is not just spread out, its position
can be
>quantum-mechanically *uncertain*, which is a different sort of thing.
>General relativity allows the energy to be spread out over space, but
it
>makes no provision for the energy to be in a *superposition* of states
in
>which it is at point A and states in which it is at point B.
>
>Some people have proposed ignoring the distinction and using the
>quantum-mechanical average or "expectation" value, but that creates
other
>problems. There's the question of whether the expectation values
"collapse"
>when you observe where a particle is. Experiments with large masses
whose
>positions are determined in a "Schrodinger's cat" way show that if you
want
>this expectation-value-coupling idea to work at all, there has to be
some
>sort of collapse. But then there are other problems. Suppose a
particle's
>wave function is spread out over space and you observe it. The wave
>function collapses instantaneously into a little dot; in terms of
>expectation values, stress-energy has disappeared in one place and
>instantaneously appeared somewhere else. GR *breaks* if you try to
plug
>this sort of thing into it; it gives inconsistent results. So making
>this work would involve not just imposing a particular QM
interpretation,
>but doctoring up general relativity somehow as well.
>
>-- 
>Matt McIrvin   
    Could you use Mr. Blood's equation and then plug into Schrodinger's
wave equation to see if you get different results?
Edward Meisner
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Subject: Re: How Much Math? (Was: Re: How much to invest in such a writer?)
From: lew@ihgp167e.ih.att.com (-Mammel,L.H.)
Date: 23 Oct 1996 23:06:38 GMT
In article <54jcg9$jt@panix2.panix.com>, G*rd*n  wrote:
>taboada@mtha.usc.edu (Mario Taboada):
>| 	More importantly, you need the calculus to properly formulate
>| concepts like instantaneous velocity and acceleration, without which
>| kinematics cannot be studied "exactly".  ...
>
>What do you mean by "properly formulate"?  I drive my car
>around, intuiting instantaneous velocity and acceleration,
>without performing even informal thumbnail calculus.  Or
>does my nervous system do it sneakily out of sight of
>my consciousness?
One place where intuition surely fails is in dealing
with centripetal acceleration. in driving, you experience
a centrifugal force, which is balanced by, e.g. the car
seat holding you in place. This force is generated by
going around curves and if it gets too great it will push
the car off the road.
The idea of an acceleration perpendicular to the direction
of motion, and especially the idea that it is qualitatively
the same as acceleration along the line of motion, is highly
nonintuitive. Galileo, incidentally, made a mess of it when
he tried to deal with it quantitatively.
Lew Mammel, Jr.
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Subject: Re: Science and Aesthetics [Re: When did Nietzsche wimp out?]
From: Vance Maverick
Date: 23 Oct 1996 16:28:49 -0700
In article <54m2l2$43n@tierra.santafe.edu> jti@isleta.santafe.edu (Jeff Inman) writes:
> Vance Maverick  writes:
 [Weinberg snipped -- vide supra]
> Geek aesthetics is right, and Weinberg's statement sounds just like
> what we have been hearing from the science-has-no-mythos camp, in this
> thread and every other one that vaguely resembles it.
As it turns out, the fragment I quoted (it's just the first thing I
found on pulling the book from the shelf) is not fully representative.
At least in his more narrative sections, Weinberg is up to something
more interesting than the usual.  In particular, he casts real doubt
on the utility of the crude falsificationist model.  I think I'll have
more to say when I'm done.
> The scientist
> will tell you that his theories are only refuted by natural laws
Weinberg may come close to saying this, but the story he tells is
richer.
Earlier, in parenthesis:
> [This reminds me of your recent statement that you found very few
> classes that had anything to say about beauty.  If it could be taught,
> there would be teachers of it?  What constitutes an "explanation"?]
There may well have been classes teaching beauty, or at least
sponsoring its discussion, but I was on a somewhat narrow track -- I
took hardly any literature courses, no art or music history, no
relevant philosophy, and no "art practice" classes but composition.
	Vance
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Subject: Re: Does drafting slow the front rider?
From: jbrandt@hpl.hp.com (Jobst Brandt)
Date: 23 Oct 1996 15:51:45 GMT
Erik Buitenhuis writes:
> In long, descents where I drafted a (heavier = faster) friend of
> mine going 80-90 km/h (50-55 mph) he reported the effect. He could
> see his speed dropping slightly on his computer every time I
> drafted.  This happened several times, all in different descents.
Wait a minute, the contention is that drafting increases the speed of
the leading rider.  How can you state the opposite when those using
aerodynamic jargon claim greater speed?  On the other hand, I know of
no straight descent long enough and with such a uniform gradient that
will give a speed continuous and uniform enough to detect variations
of 1-2 km/h.  This whole experiment sounds highly suspect to me.
Jobst Brandt       
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Subject: Re: When social critics wimp out ... (was: Nietzsche)
From: rafael cardenas
Date: Tue, 22 Oct 1996 23:35:09 +0100
Mark O'Leary wrote:
> 
> Would a bridge player be berated by the other players if they started using
> 'rubber' as in the american slang definition in the middle of a discussion
> of what the score was? At best they'd engender confusion, at worst outright
> ridicule.
> 
> Would a spectator to our hypopthetical bridge match be berated for telling
> the players "Well, of course _real_ players score by the set like they do in
> tennis, and its double points if its a tuesday...". At best they'd engender
> patient attempts to explain the fundamental incorrectness of their
> assertion, at worst annoyance and scorn.
I'd just love to see someone do that to bridge players. They deserve it.
-- 
rafael cardenas huitlodayo
Swarfmire College, Goscote, UK
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Subject: Re: PEACE VACCINE (or more precisely, PEACE GENETIC-VACCINE)
From: rayvt@comm.mot.com (Ray Van Tassle)
Date: Tue, 22 Oct 1996 14:07:56 -0500
> Abian answers:
>  
>   Using your own words addressed to me, I say, you Mike Turk are silly
> yourself and your answer is even sillier.  You need precisely to be
> Peace -Vaccinated  to change your behavior of insulting people.  
>   Secondly, if one demonstrates to people that some Peace Vaccine would
> eliminate the manslaughter, savage, murderous instincts of humans -
> any rational person would volunteer to be vaccinated! Only people with
> vicious nature may oppose it,  and hopefully they can be also convinced 
> that PEACE VACCINE is the solution.  History has shown that lecturing, 
> education, religion, lessons of  morality, etc.,etc did not (and do 
> not) prevent wars.  The only hope is the PEACE VACCINE.
Unless and until such a thing exists, these are all null conjectures.
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Subject: Re: When will the U.S. finally go metric?
From: Paul Skoczylas
Date: Wed, 23 Oct 1996 17:29:31 -0600
David C. Brower wrote:
> 
> billa@znet.com (Bill Arnett) writes:
> 
> >Because we  exchange a lot of hardware which would interoperate a whole lot
> >better and be cheaper to manufacture  if everything were done in the same
> >units.  This is not an insignificant cost, probably many billions of
> >dollars per year.
> 
> Can you work this out in some more detail; it's often asserted, but
> I'm wondering about the evidence.  How is the manufacturing going to
> be cheaper?
> 
I don't know about manufacturing, but the U.S. is at a large
disadvantage when it comes to sales outside of North America.  The
"billions per year" I've heard about is the loss of trade income for
this reason.  (Of course, there's no denying it would cost manufacturers
billions to make the switch to metric.  That's a large outlay, even if
they could make it back in a couple of years.)
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Subject: Re: On Religion: Can we at least agree on this truth?
From: natalie@col.hp.com (Natalie Ramsey)
Date: 23 Oct 1996 15:20:52 GMT
Note followups.
Siegfried (csaint@proaxis.com) wrote:
: kbb@enterprise.net (Kevin B Black) wrote:
: >In article <543g4a$k93@news.proaxis.com>, Siegfried  wrote:
: >>Here is my contention:
: >>
: >>With regard to the existance of a god (like the Christian one) there are 
: >>three general options: 1. God does not exist, 2. God exists and is 
: >>malevolent, 3. God exists and is benevolent.  
: >>
: >What happened to option 4? God exists and is indifferent.
: By using the word "general" I intended for that option to be subsumed 
: under option #3.  
"Indifferent" is not a subset of "benevolent" whether you use the word
"general" or not.
Blessings,
Natalie
--
Natalie Overstreet Ramsey -  - ** I don't speak for HP ** 
    Upon the advice of my attorney, my .sig has no comment at this time.  
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Subject: Help!PLEASE!-Klothiold Loops
From: smurfy@vcn.bc.ca (Roch Ripley)
Date: 23 Oct 1996 23:15:15 GMT
   I have a question:  Why do engineers use (Klothoild Loops, I think 
that's how you spell it), instead of circles when they build the roller 
coasters?  Klothoild loops are not really a circle, but the radius is 
different at every point.  My teacher told me that the ride produces 
"g-force" energy and it's more efficeint to use the Klothoild Loops?!?
  If anyone can provide a clear, and precise definition, please e-mail 
me, thanks a million.
Jason
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Subject: Re: MRI limiting factor on resolution?
From: peter@hpl.hp.com (Peter Webb)
Date: 23 Oct 1996 15:47:40 GMT
Harry H Conover (conover@tiac.net) wrote:
: Isaac Brownell (rownell@bcm.tmc.edu) wrote:
: : 
: : What is the limmiting factor on MRI resolution?  
: The frequencies, and thus the wavelengths and resolution, used in MRI
: are determined by the organic molecules of the body.
The frequencies used in MRI have little to do with resolution (60 MHz ->
5 meters free space wavelength, yet submillimeter resolution).  The
practical answer is that resolution is usually limited by SNR, with
diffusion playing a role (by limiting spatial encoding time, and the
persistence of spatial encoding) at the very low end.
Peter
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Subject: Re: Hermeneutics and the difficulty to count to three...
From: rvien@dreamscape.com (Robert Vienneau)
Date: 23 Oct 1996 23:32:22 GMT
A traditional metaphor (from Popper?) - and it's a good one - is that
science is reconstructing a fleet of ships while in full sail at mid
sea.
Mati, can you summarize the "Whig theory of history" and tell us whether
it is well-thought of by contemporary historians?
A quote:
  "For many years now historians have preferred to turn their attention
  to long periods, as if, beneath the shifts and changes of political
  events, they were trying to reveal the stable, almost indestructible
  system of checks and balances, the irreversible processes, the
  constant readjustments, the underlying tendencies that gather force,
  and are then suddenly reversed after centuries of continuity, the
  movements of accumulation and slow saturation, the great silent,
  motionless bases that traditional history has covered with a thick
  layer of events...These tools have enabled workers in the historical
  field to distinguish various sedimentary strata; linear successions,
  which for so long had been the object of research, have given way to
  discoveries in depth. From the political mobility at the surface down
  to the slow movements of 'material civilization,' ever more levels of
  analysis have been established: each has its own peculiar
  discontinuities and patterns; and as one descends to the deepest
  levels, the rhythms become broader. Beneath the rapidly changing
  history of governments, wars, and famines, there emerge other,
  apparently unmoving histories: the history of sea routes, the history
  of corn or crop rotation, the history of the balance achieved by the
  human species between hunger and abundance...
  At about the same time, in the disciplines that we call the history of
  ideas, the history of science, the history of philosophy, the history
  of thought, and the history of literature (we can ignore their
  specificity for the moment), in those disciplines which, despite their
  names, evade very largely the work and methods of the historian,
  attention has been turned, on the contrary, away from vast unities like
  'periods' or 'centuries' to the phenomena of rupture, of discontinuity...
  ...they direct historical analysis away from the search for silent
  beginnings, and the never-ending tracing-back to the original
  precursors, towards the search for a new type of rationality and its
  various effects...they show that the history of a concept is not
  wholly and entirely that of its progressive refinement, its continually
  increasing rationality, its abstraction gradient, but that of its various
  fields of constitution and validity, that of its successive rules of use,
  that of the many theoretical contexts in which it developed and matured..."
    -- Michel Foucault, _The Archaeology of Knowledge_, Pantheon Books,
       1972, pp. 3-4.
-- 
Robert Vienneau                   Try my Mac econ simulation game,            
rvien@future.dreamscape.com       Bukharin, at
  ftp://csf.colorado.edu/econ/authors/Vienneau.Robert/Bukharin.sea
Whether strength of body or of mind, or wisdom, or virtue, are always
found...in proportion to the power or wealth of a man [is] a question
fit perhaps to be discussed by slaves in the hearing of their
masters, but highly unbecoming to reasonable and free men in search
of the truth.                         -- Rousseau
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Subject: Re: Sophistry 103 (was: I know that!)
From: candy@mildred.ph.utexas.edu (Jeff Candy)
Date: 23 Oct 1996 23:40:58 GMT
Silke-Maria  Weineck:
|> The humanities have no choice but do tolerate "imprecision" at 
|> times; some of the very best work done in the humanities is 
|> "imprecise" according to nat-sci standards. 
Of course (BTW thanks for the reply).
|> This is a weakness only from the nat-sci viewpoint; 
This statement needs to be stronger, I think.  Objective reality 
dictates that a viewpoint other than the nat-sci viewpoint is 
playing the game sort of "deuces wild".
|> it can also translate into considerable intellectual and 
|> conceptual liberty -- to be used as well as abused, no doubt.
Sure.  I can think of no area of the humanities (except for 
perhaps pathological examples) where the rigor demanded of a 
theoretical physicist would permit any progress whatsoever.
|> Moggin was not debating that shit gets published in humanities 
|> journals -- he was debating whether this says anything 
|> interesting, or "precise" for that matter, about post-structuralism, 
|> Nietzsche, Heidegger, Lacan, etc.
Well this is something different.  
You should understand, however, that there is no shortage of 
skepticism and hostility towards new ideas even within a particular 
branch of physics.  Rarely is there any love lost between owners of 
competing theories and/or explanations.  Often, even when one is correct, 
it can be a real chore to convince others that what you say is really 
true.  It only gets worse when someone in the humanities is peddling 
a global perspective or all-encompassing theory; we're just not willing 
to buy it unless a very convincing guarantee is offered. 
I guess this is no suprise. 
|> It is very rare that physicists submit to humanities journals; if 
|> you are suggesting that the article should have been sent out to 
|> another physicist, I whole-heartedly agree.  As things stand, 
|> however, the hoax proves that the grad student whom A.Ross let 
|> judge the article didn't know much about either science or 
|> literary theory -- and what does that prove?
Exactly what you said.   
-------------------------------------------------------------------
Jeff Candy                        The University of Texas at Austin
Institute for Fusion Studies      Austin, Texas
-------------------------------------------------------------------
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Subject: Re: r constant
From: vorwerkp@ohsu.edu
Date: 24 Oct 1996 00:20:29 GMT
in response to your R question, I beieve it is named after a man named
Rydeburg (sp?). This is equivalent to 1.987cal mol^(-1) K^(-1) or
                                      8.314 J mol^(-1) K^(-1)
I believe most current text books refer to as the gas constant, but I am
sure if you wanted to check on it you could just pick up a chemistry text
5 or more years old.
                                        Derek Slottke
                                      OHSU Ped. Endo.
                                      PSU physics undergrad
                                      slottked@ohsu.edu
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Subject: Re: [Fwd: Re: The Conscious Mind -- David Chalmers]
From: David Yeo
Date: Wed, 23 Oct 1996 13:00:37 GMT
On 22 Oct 1996, Anders N Weinstein wrote:
> Computationalists hold one sort of anti-reductionism -- they believe
> the predicates of computational psychology form an autonomous level of
> explanation -- while respecting the truths of physical science -- these
> events are realized in physical stuff. So what's wrong with
> "phenomenologists" -- believers in the irreducibility of intentionality
> -- holding another, while not contradicting the truths of physical
> science?
If a phenomenon emerges from the interaction of physical properties, as
colour emerges from the interaction of our three cone types (blue, green,
yellow) does the discovery of base entities and the interaction constitute
a successful reduction to "the truths of physical science"? 
Moreover, isn't the intentional stance simply a level of description; one
which merely simplifies (and thus does not preclude) the physical stance? 
Cheers, 
- David Yeo (Applied Cognitive Science, University of Toronto)
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Subject: Re: How Much Math? (Was: Re: How much to invest in such a writer?)
From: Noel Smith
Date: Wed, 23 Oct 1996 23:57:46 GMT
Jeff Candy wrote:
> 
> G*rd*n [F*tch]:
> 
> |> Obviously "pass the 100m mark exactly 20 seconds after you
> |> start to accelerate" is language.
And as Fitch so memorably told us during the Science Wars, 
"f=ma" is "social."
And he wonders why so many of us find this kind of thinking a 
real hoot.
> If you didn't drive your high school physics teacher to drink,
> I'd be awfully suprised.
> 
> Jeff
- Noel, bracing for a lecture on the metaphysical implications 
of his naive use of "real."
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Subject: Re: Creation VS Evolution
From: myers@netaxs.com (Paul Myers)
Date: Wed, 23 Oct 1996 19:40:22 -0400
In article <326E9B59.D2D@primenet.com>, vanomen  wrote:
> That sad to hear... I on the other hand look forward to His coming and 
> living and serving Him forever and ever and ever....  WOW what a 
> thought.  Gives me goose bumps
Could you please restrict this kind of repressed/submissive homoerotica
to the appropriate newsgroups, like alt.sex.motss? Thank you.
-- 
Paul Myers                               Department of Biology
myers@netaxs.com                         Temple University
http://fishnet.bio.temple.edu/           Philadelphia, PA 19122
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Subject: Re: Hermeneutics and the difficulty to count to three...
From: weinecks@mail1.sas.upenn.edu (Silke-Maria Weineck)
Date: 23 Oct 1996 22:31:10 GMT
Anton Hutticher (Anton.Hutticher@sbg.ac.at) wrote:
: weinecks@mail1.sas.upenn.edu (Silke-Maria  Weineck) wrote:
: >
: > uchicago.edu>:
: > Distribution: 
: > 
: > meron@cars3.uchicago.edu wrote:
: > : In article <54blb8$sqt@netnews.upenn.edu>, weinecks@mail2.sas.upenn.edu (Silke-Maria  Weineck) writes:
: > : >meron@cars3.uchicago.edu wrote:
: > : >: In article <54at8t$ghp@netnews.upenn.edu>, weinecks@mail1.sas.upenn.edu (Silke-Maria  Weineck) writes:
: > : 
: 
: > : >: >I know what you're saying but don't think it's relevant, since, as 
: > : >: >Richard pointed out, moggin's point was that "wrong in some instances" 
: > : >: >can be translated into "wrong" tout court; that was the debatable 
: > : >: >assertion. I have no problem with your account of how these things work, 
: > : >: >I just don't think the argument was about it.
: > : >: >
: > : >: Well, I consider it relevant since it precisely illustrates the point 
: > : >: that "wrong in some instances" doesn't simply translate to "wrong".
: > : >
: > : >No, Mati, that won't do; it doesn't "illustrate the point," it 
: > : >illustrates your sense of when it makes sense to call a theory "wrong." 
: > : >I'm not saying it isn't a sensible position -- I think it is --, but I 
: > : >can also see an argument that understands right or wrong in absolute/ist 
: > : >terms. 
: Shure, but it is not the normal use in natural science. Communication
: would be extremely cumbersome in science if right or wrong are understood
: in absolute terms only. And "Newton was wrong...." does talk about a 
: scientific theory being wrong. Therefore most people will assume a 
: certain usage of this word. 
I understand that. Whenever a thread is cross-posted between science 
community and non-science community, however, mutual accomodations are in 
order. Witness the "generalization" terminology: for most people, 
"generalizing" something means to make it _more_ applicable, to extend or 
expand its applicability. I do not for a moment doubt that Mati uses the 
term correctly according to sci usage, but it's counter-intuitive to the 
rest of us.
: > : >
: > : I can see such argument too, but it has nothing to do with science.  
: > : This is not how science works.  Of course you're free to say "this is 
: > : my definition of science, and my definition ofright and my definition 
: > : of wrong.  that's what I'm talking about and I don't care how other 
: > : people understand these terms."  You're welcome to do it but I'm 
: > : afraid that you'll find such approach less then useful.
: > 
: > We're not quite there yet, but getting closer: it is my impression that 
: > moggin used his own vocabulary in talking about an aspect of science; you 
: > are saying (and I take your word for it) that scientists don't talk that 
: > way, and that it wouldn't be useful for them to do so -- again, no 
: > problem. However, non-scientists in a non-scientific forum are surely not 
: > held to your rhetorical practice. 
: Moggin has been told that his use of certain words (wrong, true, etc)
: is quite different from how they are used by scientists and is misleading
: as long as he doesn´t tell that his usage differs. So far he refuses.
: And non-scientists generally do not use "wrong" etc. the way moggin 
: does, but remarkably often like scientist do.
I don't think he refuses to acknowledge that sci uses the terms 
differently; I think he insists on using them according to his own 
vocabulary standards. That said, however, these threads have long stopped 
being "about" moggin's use of the word 'wrong' -- it would have been just 
fine, I think, to declare all around, "Newton was wrong according to 
this-or-that usage of the word, and not wrong according to this-or-that." 
The mobbing of moggin was hardly warranted  -- and it's the mobbing that 
made me enter these threads, not any intrinsic interest in whether Newton 
was right or wrong or generalized or specialized. The extraordinary 
hostility emanating from the sci posters is still baffling me -- before 
someone points out that I myself have quite a few hostile postings to my 
name, yes, I know that. I have not, however, told people that they have 
no basic intellectual integrity, that they are habitual liars, shouldn't 
teach in their professions, etc. etc. Despite Gordon's efforts of 
elucidating how such things happen, I continue to wonder at that course 
of events.
: >Imagine a hard-core deconstructionist 
: > raise his hand every time someone in r.a.b. talked about an author, 
: > demanding proof that the person had read Foucault as well as Barthes as 
: > well as Derrida on the question of authorship, was cognizant of the 
: > complex tradition of authorship, could clearly and accurately account for 
: > his use of the word, etc. etc. 
: Imagine someone at r.a.b. discussing Hamlet and starting with the line:
: Hamlet is a chauvinistic piece of shit because the heroine, Juliet, is
: killed by her lover, Romeo, against her wishes. Wouldn´t someone on 
: r.a.b. ask: Please, read *Hamlet* before you say that, and, if 
: possible, other Shakespearean pieces. 
I still think my analogy is better, since, as we established above, 
"right" and "wrong" as moggin uses them are legitimate uses of the word 
outside of sci, just as the word "author" in an unreflected way is 
legitimate outside of high octane lit-crit. To put Juliet into Hamlet is 
another matter.
: >This is, to a certain degree, how "the 
: > science camp" comes across in these threads; it seems you are used to 
: > being amongst yourselves more in t.o. or sci.ph. -- perhaps it's all just 
: > mutual culture shock.
: Culture shock?
: Could be, but after having had several debates along the lines:
: :"Science is wrong! Why? Because they will always have an experimental
: :error, and if something is wrong in the millionth decimal it is 
: :*wrong*.
: :There is no progress in science! Why? Ptolemy was wrong, Newton was 
: :wrong, Einstein (say scientists) is wrong. NO progress."
But you do realize that you are making this up, right? Whereas I am _not_ 
making up that Derrida's writings have been called "shallow," 
"gibberish," etc. etc.
: I very much doubt that this is unintentional.
"this" being, so far, a fantasy. 
: I have corrected the use of loaded words in those debates, pointing 
: out that scientists as well as the general public have a different 
: usage and that laymen are sure to draw wrong inferences, but to no 
: avail. I have asked that it be explained at the beginning that 
: certain words are used in nonstandard ways, in ways shure to mislead 
: if not explained. No response! 
: These words are *calculated* to mislead.
As someone said, it's a conspiracy?
Silke
Return to Top
Subject: Re: Electrical resistance of vacuum (was Electrical arcing)
From: gcodner@lightlink.com (Jerry Codner)
Date: Wed, 23 Oct 1996 20:53:57 -0500
In article , meron@cars3.uchicago.edu wrote:
> In article <54k4li$njo@dfw-ixnews7.ix.netcom.com>, sammya@ix.netcom.com
writes:
> >
> >A few days ago I posted a question on wether it was possible to attain
> >a certain field strength without arcing (because when I did my
> >experiment in air it arced).  I made the suggestion of doing this in
> >vaccum and somebody pointed out that vacuum is a poor resistor.  How
> >can this be?  If a vacuum can be defined as nothing (well...I think 10
> >e -6 torr is almost nothing) how can it be a poor resistor?  Somebody
> >else pointed out that vacuum is a good resistor at a low enough
> >pressure but as it gets lower the resistance then lowers (he refered
> >to Paschens law)  
> >
> Referring to a gap as resistor is misleading since it doesn't follow 
> Ohm's Law.  So lets talk in terms of "discharge potential", the 
> potential difference for which you'll get arcing between two 
> electrodes.  As you lower the pressure from atmospheric this valuewill 
> get lower and lower till you reach a minimum in the vicinity of 
> 10^-3 Torr.  Form this point it'll improve again and typically it'll 
> roughly return to the same value you had at atmospheric pressure, 
> around 10^-6 Torr.  If you lower the pressure further the resistance 
> to arcing will get better and better.  However, getting below 10-6 
> requires special equipment, materials etc.  A better approach is to 
> work at elevated pressure (higher then atmospheric) with the 
> appropriate gas mixture.  Small Van de Graafs routinely use an 
> nitrogen- Carbon diaxide mixture at few atmospheres.  SF6 works even 
> better but is not as easy to obtain.
> 
> Mati Meron                      | "When you argue with a fool,
> meron@cars.uchicago.edu         |  chances are he is doing just the same"
Paschen's law refers to the effect described by Mati Meron.  I mentioned
it in my original answer.  I did not mention pressurization, but that is a
good alternative.  Dry nitrogen is often used as well as SF6 (sulphur
hexafluoride) but SF6 creates toxic products if an arc does occur.  I
reiterate that a fluid dielectric might be easiest, but chemical compatibility
can be a problem.
Jerry Codner
gcodner@lightlink.com
_________________________________________
"I'm an engineer, Jim, not a magician."
Return to Top
Subject: Questions about Engeneering Physics
From: jes203@is5.nyu.edu (Slither)
Date: 23 Oct 1996 21:55:04 GMT
Hi,
I am a college freshman considering a major in Engeneering Physics.  I 
have decided it would be a good idea to research this further:  Is 
anyone out there involved in this profession?  Does anyone have any 
advice as to whether this is a 'good move'?   How is the job market in 
E.P. and how does it look for the future.  How does it compare to other 
areas of engeneering in terms of job security, salary, and opportuntity 
to engage in research?  In general where are the jobs in EP (Which 
corporations, government institutions, and which parts of the country 
and world are the jobs located?)
I have always been interested in Physics and would like the opportunity 
to work in a field where I get to apply the conceps.  Is this a 
realistic assesment of what one does in E.P.  There is a general 
perception that a physics major is exceedingly difficult.  Is this the 
case?
Any input would be greatly appriciated
------------------------------------
Jack Singal
New York University
Home Page:
    http://pages.nyu.edu/~jes203/
"Free your mind, and your 
   ass will follow."
  -George Clinton
------------------------------------
Return to Top
Subject: Re: Sophistry 103 (was: I know that!)
From: zeleny@oak.math.ucla.edu (Michael Zeleny)
Date: 24 Oct 1996 00:06:33 GMT
brian artese  writes:
>Michael Zeleny wrote:
>>Now that you have implicitly established my egregious lack of knowledge of
>>and training in philosophy, would you be so kind as to indicate the exact
>>provenance of Derrida's philosophical credentials?  Afterwards, you might
>>consider explaining the nature of dispensation that allows you to "expose"
>>Sokal without engaging his _Social Text_ article.
>I'm not sure what in what "provenance" philosophical credentials could
>be said to live.  Normally, among scholars who read, one could answer
>your question by referring to the author's books.  But I understand I
>can't do that here.  And as far as engaging Sokal's presumption about
>contemporary continental philosophy, what more do I need than the
>_Lingua Franca_ article I brought to the table?
You might begin by looking up the _Social Text_ article to which the
_Lingua Franca_ item was written as a postscript.  As regards the
provenance of one's philosophical credentials, the name of Derrida's
dissertation adviser would do rather nicely.
>>The critical presumption, if it be one, is surely no greater than that of
>>criticizing science or deconstructing its metaphysics without doing the
>>most basic math that undergirds it.  I leave it up to you to think about
>>how and why the postmodernists acquired their reputation for innumeracy.
>Descartes was a decent mathematician, no?  Yet Descartes' metaphysical
>statements -- which are based on grammatical rules, not mathematical
>ones -- are easily demystified.
Then demystify them.  Tell me how to choose between arguments in favor
of Cartesian dualism such as are advanced by Saul Kripke, Wilbur Hart,
George Bealer, or David Chalmers, and counterarguments that defend
materialism such as are put forth by Michael Levin, Daniel Dennett, or
Paul and Patricia Churchland.  Since you purport to have an infallible
device for resolving ancient metaphysical controversies, you could make
yourself immortal by ending this particular conflict right here and now.
A straightforward way to do so would be conclusively to resolve the
debate between Bealer and Levin, which appears on pp 185-208 and 314-323
in the 1994 volume of _The Journal of Philosophy_.  Go for it.
>Descartes was no numerical illiterate -- and in, fact, he claimed that
>all of his philosophical pronouncements could be traced back to the
>most rigorous science, just as you do.  But -- lo and behold -- what
>did these mathematical proofs ultimately yield?  What was the
>obviously inevitable conclusion of his great scientific project
>(inevitable *because* it was founded on science, on nothing but the
>most rigorous skeptical logic)?  Why, it was nothing less than the
>existence of God! So much for the inevitable insight of math.  I find
>it hilarious when people claim that a knowledge of math somehow
>immunizes them from the conceptual mechanics inherent in their
>grammar.  A knowledge of math does *not* suddenly divorce your
>discourse from the tropes and metaphors that construct its
>metaphysics.  I find that it is *quite possible* for people adept at
>numbers to not know thing one about how those tropes are operating in
>their speech and philosophical discourse.
And I find that it is quite common for people adept at rhetorical
obfuscation to be ignorant of the most basic principles of logical
reasoning.  And now that we have the politeness factor taken care of,
your characterization of the Cartesian project in the Meditations is
potentially misleading.  Descartes' proof has nothing to do with the
God of Biblical revelation.  The entity in question is simply that
than which none greater can be conceived.  But as borne out by the
work of Spinoza, no attribute of personhood such as capacity for
perception, cognition, or volition, apply to this sort of being.
Moreover, Descartes' ontological argument, like his proof of dualism,
can be readily translated into the mathematical formalism of symbolic
logic.  Some translations of this kind can be found in the writings of
Charles Hartshorne and Alvin Plantinga; a related proof due to Kurt
Goedel has been widely disseminated in folklore prior to its recent
annotated publication in the third volume of his Collected Works.
Since Goedel's work in formal logic is so often misapplied in support
of the postmodern credo, you may want to come to terms with the fact
that his philosophy was antithetical to the neo-Sophistical revival
advocated by Derrida and his cronies.  Once again, you are welcome to
arbitrate between the defenders and opponents of these arguments.
>>Would you care to
>>gloss the statement that, "en dernière instance, la différence entre
>>le signifié et le signifiant _n'est rien_"?
>This is one of the most basic tenents of poststructuralist thought.
>It doesn't surprise me that I'm speaking to a self-styled critic of
>that discourse who needs it explained.  To gloss the statement, I have
>to assume you're familiar with de Saussure and with linguistics in
>general, 'cause I don't want to have to start from square one.  A
>signifier is a sensible thing -- ink on the page or sound from a
>mouth.  The signified refers to de Saussure's notion of some "meaning"
>that "hovers above" the signifier.  This dichotomy allows us to have
>the signifier right in front of us, and yet still ask the question
>"What does it mean?"  The traditional assumption is that the signifier
>has *a* meaning, a single meaning that grounds it.  But when we answer
>the question, for instance, "What does 'furious' mean?" we can only
>answer by saying something like "it means 'angry'" or "it means
>'hopping mad'" or "it means 'livid'" In other words, we never get to a
>signified, we only get more signifiers.  It turns out that the
>signifier does not work 'metaphorically' -- that is, as a pointer to
>some proper meaning that is its 'final foundation' -- it works
>*associatively*, in relation to other signifiers.
This is silly in at least two ways.  First of all, you have given no
reason to suppose that the meaning of a given signifier is identical
with its explanation.  Generally speaking, things are not identical
with their explanations, and there is no reason to suppose that
meanings differ in this regard.  Indeed, to assume that meanings are
reducible to equivalence classes of synonymous explanatory terms is to
assume a form of nominalism.  As before, such tacit assumptions stand
in need of rational support.
Secondly, if you were to reformulate your question by applying what the
philosophers call a disquotation schema, to read "What does it mean to
be furious?", it is by no means obvious that an exhaustive answer would
not be forthcoming purely in terms of physical objects and events.  For
instance, being furious might be exemplified by Clinton's state of mind
at a Whitewater press conference, or Yeltsin's state of mind upon being
informed of Lebed's behavior.  Arbitrarily fine distinctions between
different kinds of states could be conceivably sustained by seemingly
similar counterexamples.  And it is a basic tenet of cognitive science
that such mental states are identical with electrical activities in the
C-fibers of their bearers' central nervous systems.  By contrast, an
advocate of Cartesianism would say that in so far as this identity is
subject to rational doubt, it cannot realize in nature.  After all, it
seems that such doubt implies that mental states possibly differ from
physical states.  And it is a theorem of a wide class of modal logics
that the possibility of A and B being distinct implies their actually
being distinct.
>Think of another signifier: say, a particular speech of Hamlet's.
>Even when we have the speech right in front of us -- let's say we've
>just read it -- somebody can ask "What does it mean?"  The assumption
>is, just like with a single word, that it points to something beyond
>what it says -- or that there is something "underneath" the text which
>is its meaning or foundation.  But what happens when somebody tries to
>"get at" this meaning in Hamlet's speech?  Well, he paraphrases the
>speech.  In other words, he offers up another articulation -- another
>speech -- that claims to explain the first one.  But then somebody can
>read that second articulation, that paraphrase, and ask "What does
>THAT mean?"  And then a third party will paraphrase the paraphrase.
>And then somebody can ask of that third articulation "What does THAT
>mean?", etc.  So it becomes clear that meaning is achieved through
>diachronic paraphrases (i.e., paraphrases that follow one another in
>time) -- which topples the notion that the meaning or the signified
>exists *at the same time* as the signifier.  But that very
>contemporaneousness is the necessary basis of the signifier/signified
>dichotomy.
Once again, you are arbitrarily importing your temporal sensibilities
into your analysis of the grasp of meaning.  Suppose that understanding
is like intellectual capital.  Then Shakespearean capital accrues in my
mental bank account simultaneously with my understanding of Hamlet's
soliloquy.  Five minutes later you come along asking for an explanation
of my understanding.  Absent the faculties of mind-reading, the required
explanation can proceed only through interlocution, a diachronic process
that depends on a physical (re)production of symbols, be they graphemes
or phonemes, not unlike an economic exchange of material goods.  But
there is no valid way to make the logical leap from the necessarily
diachronic nature of verbal communication to the summary denial of the
synchronic faculty of understanding, just as there is no way to conclude
that electronic banking is impossible since the Phoenicians have taught
us to rely on tangible coins of the realm.
>In other words, it is impossible for the signified to be something
>that both (1) exists at the same time as the signifier and (2) is
>distinct from it.  There are people who claim this is not impossible,
>and those people are what we call religious people.  They must
>manufacture out of thin air a transcendental realm where this
>signified could be said to exist contemporaneously with its sensible
>partner, the signifier.  Here on earth, however, no two things can
>occupy the same space.
>
>If you really want to know what Hamlet's speech "means" -- read it
>again.  In other words, the signified _is_ the signifier -- either the
>original one, or one of the subsequent paraphrases.  The meaning is
>the articulation and the articulation is the meaning.
>
>The signified is just a signifier that hasn't happened yet.  "Meaning"
>exists in the deferral, the temporal movement from one signifier to
>another.
This is just plain dumb.  To adapt Denyer's example, if a child asks
me for a puppy, I will not be able to gratify him by paraphrasing the
term `puppy'.  I will not accept Derrida's insistent claims to the
contrary until and unless he accepts from his publisher the sequence
of letters `A', `R', `G', `E', `N', and `T' in lieu of his royalties.
>>if Derrida didn't have to extend the courtesy [of reading beyond the 
>>first chapter] to Husserl, I certainly don't have to extend it to him.
>What a whimsical way to excuse your lack of scholarship.  It allows
>you to (A) critique Derrida without reading him and (B) make a claim
>about his familiarity with Husserl -- even though such a claim could
>only be made upon a thorough reading of Derrida!  "I haven't read any
>of Derrida's 40-odd books," you say, "but I know what he doesn't
>address."
When and where did I say that?  In any event, I need not have read
"any of Derrida's 40-odd books" to know that he based his critique
of Husserl on all of thirty pages he excerpted and translated from
_Die Krisis der europaeischen Wissenschaften und die transzendentale
Phaenomenologie_.  By this standard of critical concern, the first
chapter of _De la grammatologie_ should suffice to return the favor.
>>>I suspect you won't bring to
>>>the table any persiflage from "Of Grammatology," so why don't you 
>>>excerpt something from Denyer's critique and well have a look at it? 
>>Nonsense.  I need not do more than cite Galois to rebut a presumption of
>>trisecting an angle with a compass and a ruler.  Science is a collective
>>enterprise.  In the interests of keeping it that way, you are welcome to
>>traipse to the library on your own.
>Your diversion is a bit clumsy.  I ask you to support your critique
>of Derrida by bringing some Derrida to the table, or even something
>written *about* him -- and you start yammering about Galois and
>trisecting angles?  Who do you think you're fooling?  At least I
>backed up my what I was saying about Sokal with something he actually
>wrote.  I have yet to see any of the people who talk about Derrida's
>"nonsense" have the balls to do the same.
Perhaps you are laboring under the tiresome presumption that I fished the
foregoing Derridean quotation out of my butt?  As for the rest, I am not
about to humor you by initiating a tedious exchange of "this is not what
he meant at all."  If I wanted to talk to Jacques Derrida, I would have
gone forty miles south to his Stateside court.  At this time however, I
am talking to one Brian Artese, whom I accordingly expect to bring his
own interpretations to the table.  If you want to supplement them with
textual references, I have most of the Minuit and Seuil publications at
hand.  Let's see what you got.
>>The cogito is not a logical
>>inference.  It is an immediate intellectual recognition of the locus of
>>cognitive responsibility for presently occurring thinking.  Then again, I
>>would not expect the notion of being responsible for your own beliefs to
>>be intelligible to a sophistical controversialist such as yourself.
>It's uncanny how often people who claim to be the gatekeepers of
>"rigorous logic" let themselves be mystified by blantantly religious
>discourse.  Pray tell, *where* is this "locus of cognitive
>responsibility"?  Where is this center?  In the skull?  What is this
>"source" of consciousness that is somehow *more* than the aggregate of
>all particular thoughts?  What forces me to accept the existence of this
>transcendent source, besides your arbitrary positing of it?  You'll find
>that this "locus" you're talking about is indistinguishable from "the
>soul": it serves all the same totalizing purposes, and follows all the
>same transcendental rules.
Like I said, I would not expect the notion of being responsible for
your own beliefs to be areeable to you.  Rationalism is a question
of cognitive norms, of which parrhesia is the first and foremost.
Since a rhetorician labors under an obligation to serve any cause
that retains his services, he must exempt himself from the duty of
honest truth-telling.  Unfortunately for you, this medium promotes
the preservation and reproduction of your utterances in a way that
serves as a natural remedy against prevarication and dissimulation.
So on the Usenet, the responsibility for your own beliefs is forced
upon you by the nature of their expression.  You post, therefore you
are.
>The cogito is not a logical inference?  Then what is that "therefore"
>doing in there?
Just read the book.  It's all explained there in black and white.
Cordially, - Mikhail | God: "Sum id quod sum." Descartes: "Cogito ergo sum."
Zeleny@math.ucla.edu | Popeye:   "Sum id quod sum et id totum est quod sum."
itinerant philosopher -- will think for food  ** www.ptyx.com ** MZ@ptyx.com 
ptyx ** 6869 Pacific View Drive, LA, CA 90068 ** 213-876-8234/874-4745 (fax)
Return to Top
Subject: Re: Can Science Say If God Exists?
From: nebula@spacelab.net
Date: Wed, 23 Oct 1996 20:30:09 -0400
In other words what you are trying to say here is that god only exists in 
the limits of some human primitive minds.
Return to Top
Subject: Re: r constant
From: vorwerkp@ohsu.edu
Date: 24 Oct 1996 00:19:33 GMT
in response to your R question, I beieve it is named after a man named
Rydeburg (sp?). This is equivalent to 1.987cal mol^(-1) K^(-1) or
                                      8.314 J mol^(-1) K^(-1)
I believe most current text books refer to as the gas constant, but I am
sure if you wanted to check on it you could just pick up a chemistry text
5 or more years old.
                                        Derek Slottke
                                      OHSU Ped. Endo.
                                      PSU physics undergrad
                                      slottked@ohsu.edu
Return to Top
Subject: Re: Curvature of Space-Time
From: nurban@csugrad.cs.vt.edu (Nathan Urban)
Date: 23 Oct 1996 19:55:11 -0400
(Followups to sci.physics.relativity.)
In article <326C3334.647C@direct.ca>, SAggarwal  wrote:
> Alan "Uncle Al" Schwartz wrote:
> > The fishnet (or rubber sheet) analogy is a projection of four-space onto
> > two dimensions, with curvature in the third.  That is as far as the model
> > goes.  It obviously suffers inadequacies as an analytical tool.
> So does the curvature of space-time affect the 5th dimension (if it
> exists) or is it more like looking at the world through a fisheye lens
> (just affects the dimension in question)?
I think that it is usually best to ignore the "5th dimension".  To
visualize a 2D surface, one is accustomed to pretending it's embedded in
a 3D Euclidean space.  This is not necessary.  (And can even be
misleading.  Have you seen a drawing of a Klein bottle?  The bottle's
surface does not intersect itself, yet it must be drawn that way to
embed it in R^3.)  So try to think of 4D spacetime by itself, without it
being embedded in a hypothetical 5D space; we don't see any "fifth
dimension", so it's probably not a good thing to pretend it's there.
> > >3. If the answer is no to the first two, then how do I know how to
> > >orient myself when    looking at the curvature of space-time?
> > Do the math (icky).  Any frame of reference is a valid frame of
> > reference.  Both epicycles and elliptical planetary orbits work to equal
> > accuracy.  The Copernican universe is easier on human intuition.
> So it is similar to the Star Trek thing, everything is oriented on the
> same plane (just depends what you define it to be)?
Well...  I'm not sure what you mean by everything being oriented on the
same plane.  The analogy I used earlier is the one I think is most apt:
you may make measurements of a vector in any direction you choose,
giving you the components of the vector in that direction.  Make enough
linearly independent measurements, (for an n-dimensional vector, n
measurements are necessary, of course) and you can reconstruct the entire
vector, a geometric entity.  Curvature is similar, except it's not a
vector, it's a tensor.
> > >4. Is space-time surrounding a star/planet/etc. perfectly spherical
> > >(assuming object    is perfectly spherical)?
> > Is the mass  spinning?  Is it magnetic?
> This brings up another question that is touched upon here, Earth and the
> moon would affect space-time differently (neglecting mass differences)?
> Interesting.
Slightly.  The rotational and magnetic effects are not large in that
case.
> > accelerating linearly or angularly?
> Does this include things like friction, orbits and the like?
Yes.
-- 
Nathan Urban | nurban@vt.edu | Undergrad {CS,Physics,Math} | Virginia Tech
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Subject: Re: Electrical resistance of vacuum (was Electrical arcing)
From: "Paul B.Andersen"
Date: Wed, 23 Oct 1996 23:24:10 +0200
sammya@ix.netcom.com wrote:
> 
> A few days ago I posted a question on wether it was possible to attain
> a certain field strength without arcing (because when I did my
> experiment in air it arced).  I made the suggestion of doing this in
> vaccum and somebody pointed out that vacuum is a poor resistor.  How
> can this be?  If a vacuum can be defined as nothing (well...I think 10
> e -6 torr is almost nothing) how can it be a poor resistor?  Somebody
> else pointed out that vacuum is a good resistor at a low enough
> pressure but as it gets lower the resistance then lowers (he refered
> to Paschens law)
This is not an answer to the question above but ..
I have no idea of the nature of your experiment,
so the following may be no option in your case. 
Have you considered using short pulses?
If you use pulses a few nanosecs long,
the avalanche process will not have time to
build up.
I have done this once in an experiment where very 
high field strength was needed. It worked very
well. But it requires an awesome bandwidth in
your measuring equipment.
It is quite easy to make nanosecs long pulses with
a fiew kV amplitude. I will explain how, if it is of
any interest.
Paul
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Subject: Re: r constant
From: vorwerkp@ohsu.edu
Date: 24 Oct 1996 00:19:52 GMT
in response to your R question, I beieve it is named after a man named
Rydeburg (sp?). This is equivalent to 1.987cal mol^(-1) K^(-1) or
                                      8.314 J mol^(-1) K^(-1)
I believe most current text books refer to as the gas constant, but I am
sure if you wanted to check on it you could just pick up a chemistry text
5 or more years old.
                                        Derek Slottke
                                      OHSU Ped. Endo.
                                      PSU physics undergrad
                                      slottked@ohsu.edu
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Subject: ANNOUNCE: Australian Minerals Exploration Technologies CRC
From: David O'Brien
Date: Thu, 24 Oct 1996 08:41:33 +0800
Keywords: Minerals Exploration, Geophysics, Airborne Electromagnetic,
Regolith.
The Cooperative Research Centre for Australian Minerals Exploration
Technologies (CRCAMET) announces its presence on the World Wide Web 
at:
         http://www.cs.curtin.edu.au/~david/crcamet
The mission of the centre is to develop and deliver to the 
Australian mineral exploration industry, dramatically improved 
(especially airborne electromagnetic) methods for exploration in
environments characterised by complex, conductive regolith cover. 
These methods include image processing and visualisation 
techniques.
The page aims to provide easy access to the centers publications,
partners and courses, and is frequently revised with announcements
such as employment opportunities. We hope that you visit the page
and find it a useful resource.
-- 
David O'Brien             |     http://www.cs.curtin.edu.au/~david
Perth, Western Australia. | Ph:(61 9) 351 3475; Fx:(61 9) 351 2819
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Subject: Re: Sophistry 103 (was: I know that!)
From: zeleny@oak.math.ucla.edu (Michael Zeleny)
Date: 24 Oct 1996 01:09:02 GMT
weinecks@mail1.sas.upenn.edu (Silke-Maria  Weineck) writes:
>It is very rare that physicists submit to humanities journals; if you 
>are suggesting that the article should have been sent out to another 
>physicist, I whole-heartedly agree. As things stand, however, the hoax 
>proves that the grad student whom A.Ross let judge the article didn't 
>know much about either science or literary theory -- and what does that 
>prove? 
That the postmodern "authorities", whose idiotic theses Sokal cites and
purports to sustain with parodic arguments, are full of shit.  Is that
good enough for you?
Cordially, - Mikhail | God: "Sum id quod sum." Descartes: "Cogito ergo sum."
Zeleny@math.ucla.edu | Popeye:   "Sum id quod sum et id totum est quod sum."
itinerant philosopher -- will think for food  ** www.ptyx.com ** MZ@ptyx.com 
ptyx ** 6869 Pacific View Drive, LA, CA 90068 ** 213-876-8234/874-4745 (fax)
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Subject: Re: a falling penny
From: "Trinition"
Date: 24 Oct 1996 00:53:40 GMT
Patrick Clark  wrote in article
<326D7008.3930@worldnet.att.net>...
> For years my high school students have been telling me that if you 
> drop a penny from the top of the Empire State Bldg, by the time it 
> reaches the ground it will be going fast enough to kill someone.
> Is this true or is it just one of those beliefs (like the direction of 
> the spin in an emptying toilet bowl depending on your hemisphere) that 
> is not based on fact?
> I would think that the penny would reach terminal velocity, due to air 
> resistance, pretty quickly.  I do not know how quickly, or what the 
> terminal velocity is.  Is there some way to calculate the theoretical 
> terminal velocity of a flat disk like a penny?  I realize that dealing 
> with air resistance and a spining disk is not a trivial problem.  In 
> high school physics we almost completely ignore air resistance. I 
> would like to be able to give my students a correct answer to their 
> question.  Any suggestions as to how we could determine the velocity 
> of a penny dropped from the top of our school building?
> Any help would be appreciated.
> 
> Thanks,
> Pat Clark
> 
The supposedly interesting point about the statement is thata penny could
hurt anything. It's coomonly thought of as small, useless, and light.  The
assumption is that it will obtain high speed givn far enough to fall. 
However, as the other posts have pointed out, it will reach terminal
velocity because of air, and furthermore because of tumbling.
My freshman year of college, I took Honors Physcis, and we covered this
sort ofthing.  Although I don't remember the exact formula, it was a firt
order differential equation (I hope my memory doesn't fail me).  The fast
the object moves, the more resistance, the more the velocity is affected. 
In other words, the change in velocity depends on the velocity.  I think
the solution came out to something like that of a capcitor chargin
(1-e^(-t/(RC))).  But, any calculus oriented physics book should have the
formula, I'd suggest checking there.
Brian
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Subject: Re: Project question
From: kfischer@iglou.com (Ken Fischer)
Date: Wed, 23 Oct 1996 22:31:48 GMT
maegan (maegan@sisnet.ssku.k12.ca.us) wrote:
: I am doing a science project and my question is; what is the relationship
: between Angle of decent and acceleration rate. I intend to take a piece of
: string attach it to the ground, hold it in place at various angles, put a
: wooden ball at the top and allow the ball slide down the string. I will
: clock the time the ball takes to hit the ground. I will record and graoh
: the results. does this sound like a scientificly sound, are there any
: holes or would there be any variables in this experiment? 
: I would appreciate an answer.
       Galileo Galilee (sp) did something like that a few 
hundred years ago, so did Newton, have fun.
Ken Fischer 
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Subject: Re: Q: Temperature of sky
From: kfischer@iglou.com (Ken Fischer)
Date: Wed, 23 Oct 1996 20:37:30 GMT
Philip Gibbs (philip.gibbs@pobox.com) wrote:
: Matt Feinstein wrote:
: > Philip Gibbs  wrote:
: > >Gregor Thalhammer wrote:
: > >> What's the temperature of the uncovered sky at night if it were 
: > >> modelled by a black body. (Don't tell me it were 2.7 K!)
: > >It is difficult to reply to your question because you
: > >have forbidden us from responding with the correct
: > >answer.
: > ...humidity and the amount of cloud cover.  A clear nighttime sky will
: > have a blackbody radiance with a peak around  10 microns; in degrees,
: > a really cold sky can have a temperature of -20C.  See 'The Infrared
: > Handbook'  published by ERIM, Chapter 3, for more info.
: Ok, but presumeably the correct answer then, is that 
: it cannot be modelled as a black body. It is at best
: a supposition of black body spectra from various 
: sources including the CBR and atmospheric radiation.
        The sky would have to be modeled to include all
temperatures, some in the upper atmosphere reach many 
hundreds of Kelvin.    Why would the CBR be included,
isn't it a radio frequency?
Ken Fischer 
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Subject: Re: PEACE VACCINE (or more precisely, PEACE GENETIC-VACCINE)
From: "Bill Lee"
Date: 24 Oct 1996 02:22:00 GMT
Alexander Abian  wrote in article
<54efbl$or@news.iastate.edu>...
> 
> 
> 
> 
> The  NATURE,  for the survival among the myriad of species such as
various 
> bacteria, viruses, bacilli, giraffes, cats, dogs, tigers, whales,
elephants,
> human beings, etc, etc,    selects the ones who are stronger than the
others.
> 
> Except for (hopefully all)  human beings, all other species blindly and 
> speechlessly surrender to (for us) the cruel, atrocious, heinous,
nefarious,
> monstrous and wicked NATURAL SELECTION FOR SURVIVAL which is administered
by
> the ruthless (for us the human beings), truculent and brutal NATURE.
> 
> Unfortunately, very unfortunately they are human beings who also 
> slavishly surrender to Nature's nefarious Natural Selection. They say
> "don't tamper with Nature", "don't meddle with Nature" - Let people
> die of Bubonic Plague, let people die of Cholera , let people die of 
> typhoid  - it is the NATURE's way of eliminating the weak - the ones
> who are weaker than the bacteria of Bubonic plague; it is the NATURE's
> way to eliminate the weak - the ones who are weaker than the bacteria 
> of Typhoid, etc., etc.
> 
> Yes, irrational animals, animals without creative intelligence die
> as victims of the  powerful bacteria  and viruses. As a result many 
> species became extinct. Letting the Nature to continue its  NATURAL
> SELECTION  only vicious, toxic, poisonous, deadly-powerful bacteria
> and viruses will survive and will remain on  the Planet Earth continuing
> among themselves the cruel struggle for survival.
> 
> Fortunately, human beings have intelligence, brain, ingenuity, technology
> and means of altering the very fabric of human species in order to
> overpower the deadly viruses!! And, not to allow  Nature to make
> selections at the expense of the human beings.
> 
> Contrary to the extinction of some species, because of Humans tampering
> with Nature,  human species is growing and the life span of  average
> humans has grown more than 30 years during the  19-th and 20-th
centuries.
> 
> We have defied the NATURAL SELECTION of the Nature.  We will continue
> to defy and to augment the life span of humans  and will inhabit other
> planets - but will not surrender to the (for us) nefarious Natural
> Selection which gives priority of survival to the viruses of smallpox
> and measles over the survival of human beings.
> 
> The danger for our survival will then chiefly depend on those human
> beings in whom NATURE has instilled the war- mongering and war-waging
> and man-slaughtering instincts and genetic trends. But we will
> solve this by Genetic Engineering, by  PEACE  GENETIC VACCINES or simply
> by PEACE VACCINES. The study of the (brain) genes of  those humans in
which the
> man-slaughtering, genocidal, war mongering  instincts and genetic trends
> are instilled by Nature (for purposes which are absolutely invalid
> today)  in view of our technology and the human genius will allow us
> to eliminated those genes by   PEACE VACCINE. Everyone will be inoculated
by
> PEACE VACCINE and a healthier, intellectually more brilliant and
> aggressive and technologically more advanced human species will emerge 
> which will not even dream to solve socio-economic problems by waging
> wars, by nuclear weapons and by germ warfairs.  Enough of these childish
> idiotic ways of solving human conflicts.  PEACE VACCINE IS THE WAY 
> THE ONLY WAY OF THE FUTURE.
> No education, no religious indoctrinations, no moral lecturing, no any
kind
> of  education  will (as centuries of past have shown)  do the job.  In
fact 
> the preachers of PEACE very often are the most vicious war-mongerers. 
> Vaccinating especially them is the only solution.  
> With all the nuclear proliferation around (I do not believe that
> any power and especially the super powers have ceased nuclear testings -
> they continue to test and test and test and test clandestinely), the
> only hope of human survival is the PEACE VACCINE , just as anti-smallpox 
> vaccine curtailed  a phase of Nature's Natural Selection, i.e.- letting 
> the child die and the virus  survive,  the PEACE VACCINE WILL PREVENT 
THE
> NUCLEAR HOLOCAUSTS AND WORLD WARS AND ANY WARS TO OCCUR. 
> -- 
> 
>
--------------------------------------------------------------------------
>    ABIAN MASS-TIME EQUIVALENCE FORMULA  m = Mo(1-exp(T/(kT-Mo))) Abian
units.
>        ALTER EARTH'S ORBIT AND TILT - STOP GLOBAL DISASTERS  AND
EPIDEMICS
>        ALTER THE SOLAR SYSTEM.  REORBIT VENUS INTO A NEAR EARTH-LIKE
ORBIT  
>                      TO CREATE A BORN AGAIN EARTH (1990)
> 
> 
> 
Interesting...
Actually, humanity is more fragile than you seem to think. A meteor can end
our civilization rather abruptly. I know it sounds like science fiction,
but there actually exists a small but real probability of collision(there
has been a recent interest in charting asteroids near the earth).
	There is no evidence that we are beyond nature's control. After all, all
evidence suggest that our understanding of the universe is limited.
Therefore, can we really claim to be aware and to be able to deal with all
natural threats to the existence of our species? Humans have only existed
for a very brief period of geological time, currently extinct species have
existed a quite a while longer before being wiped out. As things stand, I
don't think the market's ripe for !!!THE PEACE VACCINE!!!. We probably
still have other genocidal threats to worry about.
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Subject: Re: Hermeneutics and the difficulty to count to three...
From: moggin@bessel.nando.net (moggin)
Date: 23 Oct 1996 21:11:03 -0400
Robert Vienneau :
>A traditional metaphor (from Popper?) - and it's a good one - is that
>science is reconstructing a fleet of ships while in full sail at mid
>sea.
	It's Neurath (as quoted by Quine): "We are like sailors who
must rebuild their ship on the open sea, never able to dismantle it in
dry-dock and to reconstruct it there out of the best materials."  Of
course, it may go back before that -- I wouldn't be half surprised.
-- moggin
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Subject: Re: friction-coefficient of
From: Lyman@cwcas.demon.co.uk (Lyman Chan)
Date: Thu, 24 Oct 1996 02:22:37 +0000
George Bedard  wrote:
> When a block(longer than it is wide or high) is sliding down and incline
> plane, will it have less friction if it is put on its smaller end?  And why!
> Does the center of mass have anything to do with sliding friction on an
> inclined plane?
Simple School physics will allow to see roughly what is the motion of
the a block sliding down an inclined plane depend on. For example, apply
Newton's Laws of motion parallel and perpendicular to the slope, you
should get
        mgsin(b) - umgcos(b) = ma
                           a = g[sin(b) - ucos(b)]
[where b = angle of inclination, and u = coefficent of friction]
since g = 9.81 m/s/s, therefore the motion of a block sliding down an
inclined plane depends on u, the coefficent of friction, and b, the
angle of inclination.
It doesn't matter how you position your block, the weight, i.e., mg,
acts throught the centre of mass or the centre of gravity of the block;
which is same however you position it.
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Subject: Re: r constant
From: "Trinition"
Date: 24 Oct 1996 01:00:54 GMT
Kipps  wrote in article <326D55E7.4F2@total.net>...
> Does anybody know what the R constant stands for in the Ideal Gas Law - 
> PV = nRT? Why is it the letter "R"?
> 
> Tyler
> 
Well, I don't know, but here are my two guesses:
1. Either some French weirdo picked a French word or name that began with
'R'.
2. It simpl means 'Ratio' as in the ratio between PV and nT.
I checked one of my old chemistry books,a nd it simply said the derivation
of the formula (which I hoped would provide more insight) was beyond the
scope of this book.  You gotta loe that catch all statement.
Brian
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Subject: Re: Breakdown of Einstein's theories.
From: "Trinition"
Date: 24 Oct 1996 01:10:30 GMT
Prasanna Sritharan  wrote in article
<3264302C.712F@po.pacific.net.sg>...
> I understand that Einstein's theories of relativity break down at
> energies beyond the speed of light, but what happens to his theories
> when electromagnetic energy is slowed by a medium, such as a translucent
> glass block? The speed of light has slowed down, but do Einstein's
> theories still hold when this happens? Can a particle surpass the speed
> of light without violating Einstein's principles when light is slowed?
> 
> Prasanna Sritharan.
> 
I'm not sure if this answerrs your question, but there is the sort of
equivalent of a sonic boom with light when particles travel faster than the
speed of light in a medium.  My College Physics professor does research on
such things.  Accelerating particles to faster than the speed of light in
different mediums yields what he phoentically called "Schrinkoff" light
(some Russian guy's last name, I think).
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Subject: Re: Can Science Say If God Exists?
From: st86m@Rosie.UH.EDU (slobbering skeleton)
Date: 24 Oct 1996 01:30:54 GMT
In article <545s4i$kn6@muss.CIS.McMaster.CA>, pritchjm@muss.cis.McMaster.CA (J.M. Pritchard) writes:
>In article ,
>Aaron Boyden  <6500adb@ucsbuxa.ucsb.edu> wrote:
>
>>On 12 Oct 1996, Libertarius wrote:
>
>>> >Or, as Ivan Karamazov might say, if there is no God, there is no
>>> reason you
>>> >shouldn't kill anyone you please.
>>>     I feel sorry for Ivan and other madmen whose only restraint in
>>> hurting others is a belief in eternal punishment. Mutual respect, as
>>> expressed by the Golden Rule, for example, does not have to depend on
>>> any belief system.
>
>>I, on the other hand, feel sorry for Dostoyevsky.  Surely Ivan's position 
>>is much more complicated than this.  Note, for instance, that Ivan 
>>doesn't believe in God, and yet he doesn't kill anybody in the course of 
>>the book.  Indeed, he even goes so far as to feel guilty about a murder 
>>committed by someone else, because of the nebulous possibility that he 
>>might have influenced the murderer.  
Well, a little beside the point, but he _did_ cooperate with the murder.
Although he hid the fact from himself he actually did understand 
the bastard son's half-implied conversations (for example on one night when
the murder was likely he paced back and forth in his room and kept 
looking out the window; when Smerdya (was that the name?) suggested that 
he ought to be out of the way, he went -- all the way to Moscow -- and on
the trip he spontaneously mourned to himself, "I am base!" (this before
the murder).  In fact all of the sons were responsible.  And Dostoyevski 
actually did believe that without God all is _permitted_ (but not necessarily
commited).  But of course we can't draw any ethical conclusions from
a book of fiction, however much there is in it of the religious/political
pamphlet.
Similarly, who (among those who have 
>>actually read any part of the book) really believes Alyosha would cease 
>>to be a saint if he stopped believing in God?  Or that what's his face, 
>>the actual murderer, would have been a good guy had he believed in God 
>>(assuming that he didn't, which I also have doubts about, though I 
>>haven't read the book for a while)?  And what of the Grand Inquisitor?  
>>All in all, I am absolutely appalled at the simplistic message which is 
>>being so illegitimately derived from an immensely complicated book.
>
>
>	Nothing is more depressing than seeing people draw simplistic mores 
>from great literature - but you've already said it all, Aaron.
>
>	Bravo.
>
>
>				Jeff
>
>
>
>
>
Reverend                      st86m@jetson.uh.edu
Paul Ransom    (Slobbering
Erickson        Skeleton)     http://zeus.towson.edu/~pbake/Slob.html
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Subject: Re: Sophistry 103 (was: I know that!)
From: moggin@bessel.nando.net (moggin)
Date: 23 Oct 1996 21:19:08 -0400
Jeff Candy :
>You should understand, however, that there is no shortage of 
>skepticism and hostility towards new ideas even within a particular 
>branch of physics.  Rarely is there any love lost between owners of 
>competing theories and/or explanations.  Often, even when one is correct, 
>it can be a real chore to convince others that what you say is really 
>true.  It only gets worse when someone in the humanities is peddling 
>a global perspective or all-encompassing theory; we're just not willing 
>to buy it unless a very convincing guarantee is offered. 
	And there's no reason you should.  But just as a point of
clarification, post-modernism (is that still the topic?) takes the
same skeptical view of "global perspectives" and "all-encompassing
theories."  I'm not sure _where_ in the humanities they're popular
nowadays, but it would have to be someplace else.
-- moggin
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Subject: Re: what causes electromagnetic energy to flow ?
From: "Trinition"
Date: 24 Oct 1996 01:06:35 GMT
I can remember hearing somewhere,but I don't know if was a reasonable
source...
The B field induces and E field which induces a B field...  Therefore an EM
wave propogates itself
Brian
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Subject: Re: EASY MONEY
From: ale2@psu.edu (ale2)
Date: 24 Oct 1996 02:00:49 GMT
In article <32818ec8.16607182@news.pclogiconline.com>
Locobreth@pclogiconline.com (Chris Lehenky) writes:
>     Taking 5 minutes to read this text may be the best decision you
> ever make! 
You wouldn't lie to us would you? %^)
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