particle physics
hi, can anyone help me with a few questions please, just hints in the way to go about them would be fine.
1) Why doesnt the semi empirical mass formula accurately predict the binding energy of helium?
2)using the semi empirical mass formula, reduce it for a particle which contains only neutrons(i can do this part) and add a further term in for the gravitational potential energy of a uniform sphere which is (3/5)GM^2/R.
Assuming that each neutron occupies a box of 1fm along each side, express R in terms of the number of neutrons.
