Question

Which of the following statements is true?

Incandescent light bulbs are almost 100 percent efficient.
Endothermic reactions release heat.
Heat is considered "lost" energy because it cannot be used for work.
An electric drill gains energy in the form of heat and sound.

Answer 1

D

Step-by-step explanation:

Answer 2

I know i'm late but here the answer Heat is considered "lost" energy because it cannot be used for work.

Step-by-step explanation: