6 A vacuum pump can generate vacuum of about 1 nTorr

Last updated: 7/4/2023

6 A vacuum pump can generate vacuum of about 1 nTorr Assuming that air consists of N molecules with a collision diameter of 390 pm at 23 C calculate a the mean speed of the molecules b the mean free path c the collision frequency in the gas Given KT 2op z mean speed Ans a 472 02 m s b 1 45 104 m c 0 0324 sec 1