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 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 .

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 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.

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 .

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.

A ballon partially filled with hydrogen at normal pressure and temperature is released from the ground . At 20 kilometer up in the atmosphere the temperature is - 40^@C and the pressure is 10 cm of mercury . Calculate the percentage increase in volume of the gas in the balloon.

A gm molecule of a perfect gas at 100^@C expands isothermally until its volume is doubled. Find the amount of work done and the heat absorbed. R = 8.3J//gm-mol//K .

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)