How fission and fusion work?

Answer 1

Nuclear fission is the splitting of heavy nuclei (as U-235) when bombarded by neutrons. The nuclear fusion is the combination of two lighter nuclei into one nucleus. Both nuclear fission and nuclear fusion result in loss of mass (or mass defect) that transforms into energy according to formula E = mc2 (c is light velocity). The resulting energy manifests itself as heat energy that could be extracted and made use of as process heat, kinetic energy, and/or electricity.