Recent content by TheBoy

I made a mistake. u/p is .564 m^2/kg for the k electrons

Homework Statement Determine the number of K electrons ejected from a foil of lead with thickness 0.5 x 10^20 atoms/cm^2. It is bombarded by 10^4 photons that each have an energy of 88keV. Homework Equations From a figure in the book, it shows that u/p (7.483 cm^2/g = .7483 m^2/kg). I...

Never mind, I figured it out :) There were 1000 initial atoms and 2% of them emit energy in the form of gamma rays at 4.4 MeV. So 1000 x 0.02 x 4.4 MeV = 88 MeV Huzzah, huzzah u_u it feels good to solve your own problems.

Homework Statement I have to figure how many beta particles are released and how much energy is released as gamma rays in the complete decay of 1000 atoms of (12/5) Boron. Homework Equations Mass of one boron atom is 10.811 g. I think we may be able to use E = mc^2 somehow but I'm not sure...