Nuclear fission occurs when uranium nuclei splits into heavier metals hydrogen nuclei fuse together to make helium uranium is split into two less heavier elements and a lot of energy is released none of the above

The right option is (C).

In the nuclear fission reaction, the nucleus of atoms breaks in such a way that it converts into another smaller size atoms. On this breakdown, with new atoms, some neutrons and lot of energy also released. To initiate fission reaction, some initial energy required which is fulfilled by bombardment of neutrons. For example in Uranium-235 by bombardment of neutrons, the breakdown reaction starts, in which the two lower weight atoms like krypton-92, barium-141 formed and two neutrons with a lot of energy. The Urr-235 converts to two lower weight atoms and energy. So, the right option is (C).

0.11 m/s and 0.28 m/s should be correct

your answer is c! hope this : )