A tree leaf appears to be green. Which statement explains why the leaf isn't a blackbody radiator? A. The leaf emits light but does not reflect it.
B. The leaf emits only blue and yellow light.
C. The leaf reflects light and does not emit it.
D. The leaf does not change temperature when it reflects light.

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.