Two gases are at absolute temperatures $300 \ K$ and $350 \ K$ respectively. The ratio of the average kinetic energy of their molecules is:

The kinetic energy,due to translational motion,of most of the molecules of an ideal gas at absolute temperature $T$ is proportional to:

Obtain an expression for the momentum of a gas transferred to the walls of a container in time $\Delta t$.

If $10^{22}$ gas molecules,each of mass $10^{-26} \ kg$,collide with a surface (perpendicular to it) elastically per second over an area of $1 \ m^2$ with a speed of $10^4 \ m/s$,the pressure exerted by the gas molecules will be of the order of:

$10^{23}$ molecules of a gas, each having a mass of $3 \times 10^{-27} \,kg$, strike per second per $cm^2$ of a rigid wall at an angle of $60^{\circ}$ with the normal and rebound with a velocity of $500 \,m/s$. The pressure exerted by the gas molecules on the wall is: (in $\,N/m^2$)

The kinetic energy of $1 \ g$ of $He$ gas at $272^{\circ}C$ is ........... $J$.