can these be combined?? 1. The problem statement, all variables and given/known data why does the angular momentum,L of a electron in allowed orbit (for instance,n=3) is different when i used L=mrw and L=nh/2pi??I'hv assumed tat the electron as non-relastivistic.. 2. Relevant equations i let speed of electron =70x105m/s and rn=ao9 *mass of electron,me=9.1x10-31kg 3. The attempt at a solution K=1/2mev2-(1) K=mer2w2-(2) (1)=(2) 1/2mev2=1/2mer2w2 v=rw v=rnw where the rnis the radius of permissible orbit in atom v=ao9x w w=1.47x1016 then,i started to find L (not 'light"in death note of course ^^) L=mrw =m(9ao)w =6.37x10-24J s but when i used L=nh/2pi the answer is 3.17x10-34J s is the angular velocity couldnt use in this respect or the different is negligible??