In the nuclear reactors, subatomic particles termed neutrons are slowed down by permitting them to collide with the atoms of a moderator material, such as carbon atoms, which are 12 times as enormous as neutrons.
Part A: In a head-on elastic collision by carbon atom, determine what percentage of a neutron's energy is lost? Deduce answer in two significant figures.
Part B: When the neutron consists of an initial speed of 1.6×107, determine what will be the speed after collision? Deduce answer in two significant figures.