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Old January 5 2013, 09:31 PM   #19
Rear Admiral
Re: If hydrogen wasn't the lightest element?

newtype_alpha wrote: View Post

Excitation is detectable for some types of matter in a diffuse state -- atomic hydrogen, for example.
Then too, there is this:

Negative temperature may also have implications for cosmology. Dark energy, thought to explain the accelerating expansion of the universe, exerts negative pressure, which suggests it might have negative temperature Schneider is currently discussing the idea with cosmologists.
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