Energy and momentum

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#1296

From: Gary Hemminger
Date: Thu, 21 Jul 1994 16:05

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I've found Feynman's Character of Physical Law to be the best general
discussio
question of conservation laws, and must say that there
seems to be no reason to put one "above the other".
Where would you "put" conservation of charge?
For me energy and momentum are mysterious quantities that
always give the same sum in a closed system.  Energy is
observed to take many forms which seem totally different,
while momentum is a directional quantity which seems to
be associated only with motion.  See also Arnold Arons,
"Development of Concepts of Physics".

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From: Gary Hemminger <hemminge@PILOT.NJIN.NET>
Subject: Energy and momentum
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