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From: crm@duke.UUCP (Charlie Martin)
Newsgroups: net.misc,net.physics
Subject: Re: perpetual motion
Message-ID: <5623@duke.UUCP>
Date: Tue, 26-Mar-85 10:56:28 EST
Article-I.D.: duke.5623
Posted: Tue Mar 26 10:56:28 1985
Date-Received: Sat, 30-Mar-85 00:39:08 EST
References: <608@vortex.UUCP> <368@talcott.UUCP> <5226@tektronix.UUCP>
Reply-To: crm@duke.UUCP (Charlie Martin)
Organization: Duke University
Lines: 23
Xref: watmath net.misc:7690 net.physics:2338
Summary: 

In article <5226@tektronix.UUCP> carlc@tektronix.UUCP (Carl Clawson) writes:
>In article <368@talcott.UUCP> gjk@talcott.UUCP (Greg Kuperberg) writes:
>>
>>According to Einstein, if you
>>can create energy, you can also create *momentum*.
>
>I don't believe Einstein said this.  If he did, he was wrong.
>(Are you sure it wasn't Tesla?  He seems to be the hero of the week.)
>Rather than me posting a more detailed explanation, try reading
>the first chapter or two of a freshman physics book.
>

The problem being that you read *Newtonian* physics/mechanics in the
first couple chapters of a freshman physics book, and the person is
talking about General Relativity here...

This is referring to the something-energy-momentum tensor that was
bandied about in this same group really recently.
-- 
			Opinions stated here.

			Charlie Martin
			(...mcnc!duke!crm)