The correct answer is:
C. It is given off as heat.
When energy is conserved or transferred, some of it often dissipates as heat due to inefficiencies in the process, making it unavailable for doing useful work.
Multiple Choice Question
When energy is conserved or transferred, some energy becomes unavailable to do useful work. What happened to the unavailable energy?
A.
It is conducted.
B.
It is completely destroyed.
C.
It is given off as heat.
D.
It is given off as microwaves.
1 answer