A nucleus of uranium decays at rest into nuclei of Thorium and Helium. Then :

Question

G1 Physics · Accepted Answer

Step 1: Use conservation of mass number and charge, together with Q = (m₁−m₂)c². Step 2: For fission/fusion compare total binding energies; for β decay the mass number stays unchanged. Final: B: The Helium has more kinetic energy than the Thorium nucleus.