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
109 /sec
1.5 × 109 /sec
2 × 109 /sec
3 × 109 /sec
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CP and CV denote the molar specific heats of a gas at constant pressure and at constant volume respectively. If $\dfrac{\text{C}_P}{\text{C}_V} = \gamma$ and CP – CV = R, then CV is equal to