[boyobo]

Great article. Can energy be explained in a similarly simple fashion? I'm pretty comfortable with probability theory so this entroppy explaination makes sense, but I still don't understand what energy is.

Also, who determines what a 'macroscopic variable' is? Why do there only seem to be 3 for gassess (V, T, P?)

[petschge]

There is more macroscopic variables, for example the three components of the bulk flow velocity or the density of the gas.

[boyobo]

But are those the only 6?