Calculate the number of molecules in one cc of a perfect gas at `27^@C` and at a pressure of 15 mm of mercury. Take mean KE of a molecule at `27^@C` as `5xx10^(-11)` J and density of mercury = 13600 `kg/m^3` and g=`9.8 m/s^2`.

Find the number of molecules in 10cm^3 of a perfect gas at at 40^@C and at a pressure of 2cm of mercury. Mean KE of a gas at 40^@C=6xx10^(-21) J. Density of mercury = 13600 kg/m^3 .

Calculate the number of molecules per cc of a gas if the diameter of molecules of gas is 2xx10^(-10) m and the mean free path of the molecules of the gas is 2.4xx10^(-9) m.

What is the number of molecules in a container of volume 5 m^3 at a pressure of 2xx10^(-5) N/m^2 and at a temperature of 300 K ? Take k_B = 1.4 xx 10^(-23) J/K.

Calculate the number of molecules in one litre of gas at N.T.P. if mass of each molecule is 4.55xx10^(-25) kg and its R.M.S velocity at NTP is 350 m/s.

The rms speed of the molecules of a gas of density 4 kg m^(-3) and pressure 1.2 xx 10^5 Nm^(-2) is :

A breaker of circular cross section of radius 4cm is filled with mercury up to a height of 10cm . Find the force exerted by the mercury on the bottom of the beaker . The atmosphere pressure = 10Nm^-2 . Density of mercury =13600kg m^-3 , Take g= 10m/s^2 .

Compute the terminal velocity of rain drop of radius 0.3 mm take coefficient of viscosity of air= 1.83xx10^(-5) poise and density of air 1.3 kg m^(-3) Density of water= 10^3 kg m^(-3) and g =9.8m s^(-2)

The density of H_2 at 0^@ C and 760 mm pressure is 0.00009 g/cc. Find te R.M.S velocity of H_2 molecules.

The average speed of an ideal gas molecule at 27^@C is 0.3 sec^(-1) . The average speed at 927^@C will be …m sec^(-1).