The temperature of a gas consisting of rigid diatomic molecules is `T = 300 k`. Calculate the angular root mean square velocity of a rotating molecule if its moment of inertia is equal to `I = 2.1.10^-39 g.cm^2`.

Explanation

The root mean square angular velocity is given by
`(1)/(2) I omega^2 = 2 xx (1)/(2) kT (2 "degrees of rotations")`
or `omega = sqrt((2 kT)/(I)) = 6.3 xx 10^12 rad//s`.