Some oxygen molecules are enclosed in a container at pressure and temperature t such that their mean free path is 0.03 m and r.m.s. speed is 483 m/sec. the ti

Some oxygen molecules are enclosed in a container at pressure P and temperature T such that their mean free path is 0.03 m and r.m.s. speed is 483 m/sec. The time interval in sec, during which half the molecules are unscattered, is