[MooCow]

I'm having a tough time trying to understand the difference between average kinetic energy, rms speed, and mean free path.

I know the equation for rms, u=(3RT/M)^1/2, where R is the gas constant (8.314 J/mol), T is temperature in K, and M is molar mass in kg/mol.

I think average kinetic energy is E_k=(3/2)(RT). But I'm not sure....

And I have no idea what the equation is for mean free path.

>.<

[Mitch]

http://en.wikipedia.org/wiki/Root_mean_square#Relationship_to_the_arithmetic_mean_and_the_standard_deviation