Consider a sample of oxygen at `300K`. Find the average time taken by a molecule to travel a distance equal to the diameter of the earth.

Explanation

`bar(v) = sqrt((8 R T)/(pi M_(0))) = sqrt((8 xx 8.3 xx 300)/(pi xx 32 xx 10^(-3)))`
`= 445 m//s`
`t = (2 R_(e))/(v), R_(e)` : radius of earth
`= (2 xx 6400 xx 10^(3))/(445) = 28764 s`
`= 8 hr`