Why does hot air rise?
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Aug7-04, 04:07 AM
Chroot is correct, hot air rises because it occupies a greater volume per unit mass of air than cooler air. It is simply an application of Archimedes principle.
Incidentally, if the volume remained constant as the temperature rose, then according to GR/SR since energy is a mass equivalent the hotter body would sink rather than rise.
I'm glad you mentioned Archimedes.
I had the same problem covered in the topic "heat & weight".
I don't know if it's still around.