Thread: Why is Space a Vacuum
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Old January 28th, 2004, 05:49 AM
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Default Re: Why is Space a Vacuum
When molecules move and collide with something, they exert force on it, transfering some kinetic energy. This is what pressure is, a measure of the average force that the matter is exerting upon a surface, an object, a probe, etc.

[ January 28, 2004, 03:49: Message edited by: Imperator Fyron ]
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