In a gas, 5 molecules have speed 150 m/s, 170 m/s, 170 m/s, 180 m/s, 190 m/s. ratio of Vrms to Vmean is nearly
1
3
0.5
0.04
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The mean free path of nitrogen molecules at 27°C is 3 × 10-7 m/s. if the average speed of nitrogen molecules at the same temperature is 600 m/s then the collision frequency will be