Though the velocity of air molecules is nearly `0.5 km//s`, yet the smell of scent spreads at a much slower rate. Why ?

The kinetic theory of gases states that the average squared velocity of molecules varies linearly with the mean molecular weight of the gas. If the root mean square (rms) velocity of oxygen molecules at a certain temperature is 0.5 km/sec. The rms velocity for hydrogen molecules at the same temperature will be :

R.M.S. velocity of oxygen molecules at N.T.P is 0.5 km.ls. The R.M.S velocity for the hydrogen molecule at N.T.P is

The respective speeds of five molecules are 1, 2, 3, 4 and 5 km//s . The ratio of their rms velocity and the average velocity will be

The velocity of 4 gas molecules are given by 1km/s , 3km/s , 5 km/s and 7km/s . Calculate the difference between average and RMS velocity .

A man sets his watch by the noon-whistle of a factory at a distance of 1.5 kilometers. By how many seconds is his watch slower than the clock of the factory? (Velocity of sound in air is 332 m s^(-1) )

The root mean square velocity of a gas molecule at 100 K and 0.5 atm pressure is 106.4 m s^(-1) . If the temperature is rasied to 400 K and the pressure is raised to 2 atm, then root mean square velocity becomes

A flask contains 10^(-3)m^(3) gas. At a temperature, the number of molecules of oxygen at 3.0xx10^(22) . The mass of an oxygen molecule is 5.3xx10^(-26) kg and at that temperature the rms velocity of molecules is 400m/s. The pressure in N//m^(2) of the gas in the flask is ..............

If three gas molecules have velocity 0.5, 1 and 2 km//s respectively, find the ratio of their root mean square speed and average speed.

A body starts rolling over a horizontal surface with an initial velocity of 0.5 m//s^(2) . Due to friction , its velocity decreases at the rate of 0.05 m//s^(2) . How much time will it take for the body to stop?

The velocity of a moving galaxy is 300 km s^(-1) and the apparent change in wavelengtth of a spectral line emitted form the glalxy is observed as 0.5 nm. Then, the actual wavelength of the spectral line is