Advertisements
Advertisements
प्रश्न
Why moon has no atmosphere?
Advertisements
उत्तर
Moon has no atmosphere. The escape speed of gases on the surface of the Moon is much less than the root mean square speeds of gases due to low gravity. Due to this, all the gases escape from the surface of the Moon.
APPEARS IN
संबंधित प्रश्न
Which of the following gases will have the least rms speed at a given temperature?
Write the expression for rms speed, average speed and most probable speed of a gas molecule.
A fresh air is composed of nitrogen N2 (78%) and oxygen O2 (21%). Find the rms speed of N2 and O2 at 20°C.
Calculate the temperature at which the rms velocity of a gas triples its value at S.T.P. (standard temperature T1 = 273 K)
The number of molecules in 100 cc of gas at N.T.P. is ______ if the mass of each molecule is 4.556 x 10-25 kg and R.M.S. speed is 250 m/s.
To what temperature should hydrogen at 227° C be cooled at constant pressure so that root mean square velocity of its molecule becomes half of its previous value?
Ratio of pressures exerted by two gases is 4 : 3 and their densities are in the ratio 3 : 4. The ratio of their R.M.S. velocities is ____________.
Compare the rms speed of hydrogen molecules at 227°C with the rms speed of oxygen molecules at 127°C. Given that molecular masses of hydrogen and oxygen are 2 and 32 respectively.
Which of the following relations is correct for root means square speed of a gas at temperature T?
(m = mass of molecule, K = Boltzmann constant)
At which temperature the r.m.s. velocity of a hydrogen molecule equal to that of an oxygen molecule at 47°C?
