$A$ diatomic molecule has how many degrees of freedom?

$A$ diatomic gas consisting of rigid molecules is at a temperature of $87^{\circ} C$. If the moment of inertia of the rotating diatomic rigid molecule is $2.76 \times 10^{-39} \text{ g cm}^2$,then the rms angular speed of the molecule is (Boltzmann constant $= 1.38 \times 10^{-23} \text{ J K}^{-1}$).

State the law of equipartition of energy.

The number of translational degrees of freedom for a diatomic gas is

Derive the equation for the internal energy of a gas in terms of its degrees of freedom.

If $\gamma$ is the ratio of specific heats of an ideal gas,the number of degrees of freedom of the gas molecules is .......