(II) Below a certain threshold pressure, the air
Chapter 18, Problem 18.46(choose chapter or problem)
(II) Below a certain threshold pressure, the air molecules(0.3-nm diameter) within a research vacuum chamber are inthe collision-free regime, meaning that a particular airmolecule is as likely to cross the container and collide firstwith the opposite wall, as it is to collide with another airmolecule. Estimate the threshold pressure for a vacuumchamber of side 1.0 m at 20C.
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