(part 1 of 2) A neutron in a reactor makes an elastic head on collision with the nucleus of an atom initially at rest.
Assume: The mass of the atomic nucleus is
about 14.7 the mass of the neutron.
What fraction of the neutron's kinetic energy
is transferred to the atomic nucleus?
1. 0.238549
2. 0.298761
3. 0.271318
4. 0.286041
5. 0.256837
6. 0.290161
7. 0.29141
8. 0.211115
9. 0.270659
10. 0.253598

(part 2 of 2)
If the initial kinetic energy of the neutron is
4.42 x 10^-13 J. find its final kinetic. energy.

i guess it’s a and b

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conservation of mass

mass before something happens = mass afterwards

1.195000

explanation:

total mass=0.0117+0.0137+0.0881+0.0111

total mass= 0.01172kg

total velocity = 0.283-0.743+0.871-0.799+0.155+0.637+0.301=0.102

momentum=mv=0.1172*0.102=1.195000//