- #1

FNL

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The momentum and angular momentum of a closed system depend on its motion as a whole (uniform translation and uniform rotation). We can therefore say that the statistical state of a system executing a given motion depends only on its energy. In consequence, energy is of exceptional importance in statistical physics.

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My question , or what I can't understand is how it comes that (momentum and angular momentum of a closed system depend on its motion as a whole); while energy does not depend on that motion in order to get that importance for the distrubtion function?