Re: 4

From: Uncle Al (UncleAl0_at_hate.spam.net)
Date: 02/14/05 

Date: Mon, 14 Feb 2005 13:10:39 -0800

"St. M" wrote:
>
> An accelerating spaceship gives the
> astronauts the sensation of weight.

We know about the Equivalence Principle,

Jahrbuch der Radioaktivität u. Electronik 4 411 (1907)
The Collected Papers of Albert Einstein, Vol. 2 English translation,
A. Beck, trans. (Princeton University Press: Princeton, NJ, 1989) p.
252.

<http://wugrav.wustl.edu/people/CMW/update98.pdf>
<http://www.astro.northwestern.edu/AspenW04/Papers/lorimer1.pdf>
 Equivalence Principle testing

<http://www.npl.washington.edu/eotwash/pdf/prl83-3585.pdf>
http://arXiv.org/abs/gr-qc/0301024
 Nordtvedt Effect

> Can
> we say that this accelerating motion
> simulates gravity or is it real gravity
> that is being produced?

Moot point re linear acceleration. Read the references, above.
Angular acceleration gives you a transverse Doppler effect.
 
[snip]

> The Principle of Equivalence says that it
> is impossible to distinguish between
> accelerated motion and the effects of
> gravity. An alternate form of this
> principle is that gravitational mass and
> inertial mass are equivalent. Can you
> explain the second form of the principle
> by using the first form?

If m_g and m_i were not fundamentally indistinguishable for any and
all bodies, what could we say about contrasted local bodies' free fall
paths in vacuum, difference/average?

<http://www.npl.washington.edu/eotwash/equiv.html>
Phys. Rev. D 7(12) 3563 (1973)
http://arXiv.org/abs/gr-qc/0209110
http://arXiv.org/abs/gr-qc/9806062
http://arXiv.org/abs/gr-qc/9805088
http://arXiv.org/abs/gr-qc/0212034
http://Phys. Rev. D 43(12) 3789 (1991) 

-- 
Uncle Al
http://www.mazepath.com/uncleal/
 (Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf

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