- #36
Ken G
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Why bother to bring this up? We know that the amount that goes into rotation does not refute what I said above-- gravity always provides plenty of energy to maintain pressure balance in nonrelativistic gas. If there is some other place that energy can go for awhile, it just means the contraction will proceed even further, until the energy must once again go into pressure and balance can be achieved again. Stars are very stable to finding hydrostatic equilibrium.snorkack said:Gravity provides a certain amount of energy without caring where it goes. If it goes to translational kinetic energy, it contributes to pressure. If it goes to something else, like internal rotational energy of molecules, it does not.
I think not. Such objects cannot be in hydrostatic equilibrium, by the Hayashi theorem. They will continue to collapse until they get hotter.A body whose interior is under 2000 K, and supported by hydrostatic pressure of ideal gas diatomic molecular hydrogen, is in hydrostatic equilibrium. Is it a star?
120% is enough.And no, gravity does not provide 200 % kinetic energy that pressure needs to support it. It provides just 120 %. Gravity does provide 200 %, but 80 % go to molecular rotations, not translations.