I've been working at this problem for about an hour and can't seem to make any progress. Any help would greatly be appreciated. 1. The problem statement, all variables and given/known data Estimate the ground state energy level of a proton in the Al nucleus which has a potential energy of 100 MeV. Compare your answer to that calculated from the infinite square model. The radius of the Al nucleus is 5 fm. 2. The attempt at a solution I thought that for the first part of the question this equation should be used En = n2*h2/(8*m*L2) However, I was getting nowhere close to the answer of 1.72 MeV. For the second part I figure that it would involve Schrodinger's equation and and this equation: [tex]\psi[/tex] = (2/L)1/2*sin(n*pi*x/L) Oddly enough using the first equation and using the diameter instead of the radius I got the right answer for the second part of the question of 2.05 Mev; however, I don't think that I solved it correctly.