Re: A question on inelastic relativistic collisions

[Bob Sciamanda <trebor@VELOCITY.NET>]

SR requires that any energy transport requires mass transport, which means
momentum.
Use Einstein's gedanken  experiment about radiant energy emitted at one end
of a box and absorbed at the other end; just substitute another mechanism of
energy transport (eg heat) for the radiant energy.

Bob Sciamanda
Physics, Edinboro Univ of PA (ret)
trebor@velocity.net
http://www.velocity.net/~trebor

-----Original Message-----
From: Herbert H Gottlieb <herbgottlieb@JUNO.COM>
To: PHYS-L@LISTS.NAU.EDU <PHYS-L@LISTS.NAU.EDU>
Date: Sunday, February 21, 1999 10:02 PM
Subject: Re: A question on inelastic relativistic collisions


> On Sun, 21 Feb 1999 16:56:48 -0500 "L. R. Cartwright (Larry)"
> <physics@SCNC.CPS.K12.MI.US> writes:
> > I thought this issue was resolved in the '50s, and the thermo
> > community decided that we would call energy "heat" only if it was in a
> state of
> > maximum entropy, i.e. totally disordered;  i.e. energy becomes heat
> > by becoming disordered and the net momentum goes to zero.  Ergo, if it's
>
> > heat then there's no momentum to consider.  Am I missing something here?
> I recall that  in the 60's, 70's and 80's Zemansky was adament in
> defining heat as some kind of energy that is transferred from an object
> at a higher temperature to one of lower tgemperature.
>
> Herb Gottlieb from New York City
> (Where is is getting cold now and more cold is forcast for the next few
> days)