Recent content by Purnell

Hi, just curious because I don't have it in my notes, say for fixed A (Atomic Number) we have Z_s which is the proton number that gives max stability. For Z =/= Z_s there are 3 1st order weak process that occur, does anyone know what these are? And when Z is far from Z_s there are two strong...

Thanks I'll see where this idea takes me. The 72 in the expression is interesting that's = 12 x 6 which are the two powers involved in U(r). For small oscillations about the equilibrium point I do remember expanding as a Taylor Series, then eliminating everything from r^2 onwards. MM

Why aren't any of you helping me? I thought people were supposed to help? I have an exam tomorrow so I need help with this. I see other people getting help so why aren't I.

For a chain of masses lying on a horizontal frictionless surface, with each mass connected to its neighbour mass by a spring of force constant s, the equation of motion for the nth mass is: m(x_n)'' = -s[2(x_n) - x(n-1) - x(n=1)] Where: x_n is the displacement of the nth mass from its...