List of top Physics Questions on Atoms and Molecules

If the ratio of the acceleration due to gravity on the surface of earth to that on the surface of the moon is 6:1, then the ratio of the periods of a simple pendulum on their surfaces is

A planet with radius R and acceleration due to gravity g, will have atmosphere only if r.m.s. speed of air molecules is less than

The ratio of the kinetic energy values of 4g of hydrogen ($H_2$) to 7g of nitrogen ($N_2$) at room temprature is

The molecules of a given mass of gas have a root mean square velocity of 200 ms^-1 at 27°C and 1.0 × 10⁵ N m^-2 pressure. When the temperature is 127°C and the pressure 0.5 × 10⁵ N m^-2, the root mean square velocity in ms^-1 is