21. Kinetic Theory of Ideal Gases
Mean Free Path of Gases
4:52 minutes
Problem 18.45
Textbook Question
Textbook Question(II) Below a certain threshold pressure, the air molecules (0.3-nm diameter) within a research vacuum chamber are in the “collision-free regime,” meaning that a particular air molecule is as likely to cross the container and collide with the opposite wall as it is to collide with another air molecule. Estimate the threshold pressure for a vacuum chamber of side 1.0 m at 20°C.
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