var('k v A n b m T')
A=(2*pi*k*T/m)**1.5/n
b=m/2
var('vmean vrms vmostprob')
f=function('f', v)
f=4*pi*v*v*e**(-b*v*v)/A
assume(b>0)
vmean=integrate(v*f/n,v,0,oo)
vmean

Krane-10-10.1 (last edited 2010-12-18 11:29:35 by SabareeshNikhil)