Recent content by Cay

Thank you for replying! However, if I apply the relativistic energy formula also for the alpha particle, I get that effective mass is approximately the same as the rest mass. So I would get that β=0, which is not possible. What am I doing wrong?

I'm reposting this thread with some editing suggested by fresh_42: 1. Homework Statement Calculate the mass, velocity and the de Broglie wavelength of an electron and an alpha particle, given the kinetic energy K = 2MeV Homework EquationsThe Attempt at a Solution please find attached![/B]...