What is the microscopic origin of pressure?

Explanation

According to the kinetic theory of a gases, the pressure exerted by the molecules depands on
(i) number density`n=N/V `
Mass of the molecule
(iii) Mean square speed
The perssure is given by `p=1/3 nm barv^(2) (or) P=1/3 N/V m barv^(2)`