Re: [Phys-l] the uniqueness of entropy

[Moses Fayngold <moshfarlan@yahoo.com>]

The connection between energy conservation and translational invariance with 
respect to time has been formulated for mechanical energy (the Noether theorem).
A more general connection quoted in the previous messages, as far as I 
understand it, relates to dynamical systems, that is, includes again only 
mechanical energy.
I do not see how such definition (energy<-->time evolution) can include, e.g., 
the thermal energy, especially, for quantum systems of N identical particles 
with huge N, energy exchange through radiation etc. 


Moses Fayngold, 
NJIT 




________________________________
From: "carmelo@pacific.net.sg" <carmelo@pacific.net.sg>
To: phys-l@carnot.physics.buffalo.edu
Sent: Sat, July 2, 2011 10:49:24 PM
Subject: Re: [Phys-l] the uniqueness of entropy

Quoting ludwik kowalski <kowalskil@mail.montclair.edu>:

> Suppose I say "energy is a physical quantity whose value is given by
> the mathematical expression that generates an infinitesimal virtual
> displacement of a dynamical system in time."
>
> Would this be acceptable?

Not sure. Perhaps, it is also a kind of physical interaction?


Best regards,
Alphonsus



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