Polarizability of Liquid Helium

[mikehibbert]

Homework Statement

What's the polarizability of liquid helium given:

density= 145kgm^-3
relative permittivity = X = 1.0566

Homework Equations

alpha (polarizability) = (3(permittivity of free space))/N) / ((X-1)/(X+2))

The Attempt at a Solution

because N is molecules/volume, N=145/6.645x10^-27=2.18x10^28

plug everything in I get alpha = 2.26x10^-41

but I have no idea if this is right or not because I've never had to calculate it before??

 

[mikehibbert]

well that's great, thanks for all the help :/