the Maxwellian distribution of velocities for particles of a gas
N represents the total number of particles, m is the mass of each particle,
and e is the base of the Naperian system of logarithms. n is a quantity
such that ndv gives the number of particles with velocities between v and
v+dv. k is the Boltzmann constant
and T the absolute temperature.
For each temperature there is a maximum in the curve at a certain
velocity which becomes larger as the temperature increases.
The average kinetic energy of a gas molecule is found to be equal to 3kT/2.