Match each word with its definition. Match the items in the left column to the items in the right column. 1. splitting of a nucleus
chain reaction
2. combining of light nuclei
fission fragment
3. residue from a split atom
excited
4. causes U-235 to fission
hydrogen
5. repeated fissions
short
6. machine that burns nuclear fuel
fission
7. range of nuclear forces
neutron
8. nucleus that has excess energy
Co-60
9. fuel used by the sun
reactor
10. isotope used in medical treatment
fusion

answer: the potential energy decreases from 379 j to 243 j

explanation:

for the law of conservation of energy, the total energy in a system must be conserved. the total energy of the system is given by the sum of kinetic (k) and potential (u) energy:

e = k + u

the total energy is e=675 j, and this does not change.

initially, the kinetic energy is k=296 j, so the potential energy is

at the end, the kinetic energy is k=432 j, so the potential energy is

so, we see that the potential energy has decreased from 379 j to 243 j.