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From: kk9w@pur-ee.UUCP (Andersen)
Newsgroups: net.physics
Subject: eV Revisited
Message-ID: <1559@pur-ee.UUCP>
Date: Wed, 8-Feb-84 08:46:22 EST
Article-I.D.: pur-ee.1559
Posted: Wed Feb  8 08:46:22 1984
Date-Received: Fri, 10-Feb-84 02:45:43 EST
Organization: Electrical Engineering Department , Purdue University
Lines: 16


  I think some people missed the point of what I said in my last
note on this subject of mass vs. energy.  I think what I wrote was
clear, but here is another attempt.

  Mass and energy are related to each other by a constant.  This
constant is c^2.  If you know something's mass and want the energy
associated with that mass, you use the well known equation E=mc^2.
Likewise, to obtain mass from energy, divide the energy by c^2.
The point of the whole thing is this.  You cannot specify mass
by using units of energy.  You have to use units of mass, and the
unit of mass associated with eV is eV/c^2.   Not simply eV.

  Not a big point, but one I thought I should make.  

Dave  pur-ee!kk9w