Author Question: A neutron in a nuclear reactor makes an elastic head-on collision with a carbon atom initially at ... (Read 74 times)

james0929 · **on:** Jul 28, 2018

A neutron in a nuclear reactor makes an elastic head-on collision with a carbon atom initially at rest. (The mass of the carbon atom is 12 times that of the neutron.) What fraction of the neutron's original kinetic energy is retained by the neutron?
a. 14.4
c. 41.4
b. 28.4
d. 71.6

Question 2

We have a hollow metallic sphere with charge +5.0 C and radius 5.0 cm. We insert a -10 C charge at the center of the sphere through a hole in the surface. What charge now rests on the outer surface of the sphere?
a. +10 C
c. -5 C
b. +5 C
d. +15 C