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Studiot
Studiot is offline
#5
May13-10, 02:50 AM
P: 5,462
internal energy is energy that cannot be accounted for by specifying position, velocity, or mass.
I think this is a very good quote, if you exclude the mass.

Andy, are you sure you want to include mass, isn't internal energy an extensive property, ie twice the mass means twice the internal energy, all other things being equal?