Directory For a Sex Photos : science-gifs:A heated drum is cooled with water. Temperature is proportionate to pressure (PV=NRT), so when the pressure difference between inside and outside is great enough the drum collapses.
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» science-gifs:A heated drum is cooled with water. Temperature is proportionate to pressure (PV=NRT), so when the pressure difference between inside and outside is great enough the drum collapses.