Nd/Na = -V.g.hd(beta-beta1)/KT

NdNa: No of particules(mole)
V: Volume
g: gravitational acceleration
hd: distance
beta: densities(mass/volume)
k: Boltzman constant (joules/kelvin)
T: absolute temperature(kelvin)
volume = L3
gravitational acceleration L/T2
1joule = 1kgm2/S2