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Re: conservation of momentum (was Re: Heat as an indestructible substance)



I assume your "either" was meant to be "neither" : )

The FLT axiomizes that there exists a system energy state function
E(S,N,X). S is the entropy, N is the particle number, and X may be one or
several other state variables. The increment in energy may then be
expressed in terms of these state variables and the respective partial
derivatives:
dE = TdS + MdN + YdX. T, M and Y being the appropriate partial
derivatives. In this mathematical sense one might be tempted to view
these terms as "potential energies" - however, unlike the mechanical
potential function, they are in general path dependent.

Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
http://www.velocity.net/~trebor
----- Original Message -----
From: "Robert Cohen" <Robert.Cohen@PO-BOX.ESU.EDU>
To: <PHYS-L@lists.nau.edu>
Sent: Friday, May 09, 2003 2:33 PM
Subject: Re: conservation of momentum (was Re: Heat as an indestructible
substance)


|. . .
| In a closed system, are there any "energies" that are not either
| kinetic (either microscopic or macroscopic) in nature or potential
| in nature?