8.A standard rotary pump is capable of producing a vacuum on the order of 
Torr. What is the
single-particle collisional frequency and mean free path for N 2 at this pressure and 300 K?
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8.A standard rotary pump is capable of producing a vacuum on the order of Torr. What is the
single-particle collisional frequency and mean free path for N 2 at this pressure and 300 K?