Answer Happy

10 rl CE ere IS You e M Moderating a Neutron In a nuclear reactor, neutrons released by nuclear fission must be slowed down before they can trigger additional reactions in other nuclei. To see what sort of material is most effective in slowing (or moderating) a neutron, calculate the ratio of a neutron's final kinetic energy to its initial kinetic energy, Kf/K₁, for a head-on elastic collision with each of the following stationary target particles. (Note: The mass of a neutron is m 1.009 u, where the atomic mass unit, u, is defined as follows: 1u= 1.66 x 10-27 kg.)
An electron (M = 5.49 x 10-u). Express your answer using four significant figures. Submit Part B Y A proton (M=1.007 u). Express your answer using one significant figure. K₁ K₁ Submit Part C 195) ΑΣΦΑ Request Answer K K 1971 ΑΣΦ Request Answer The nucleus of a lead atom (M) 207.2 u) Express your answer using four significant figures. 196) ΑΣΦ ? ? ? ctor's a