Question

Which of the following has mechanical energy?
Car battery
Compressed spring
Glowing incandescent lightbulb
Nucleus of uranium atom

Answer 1

Mechanical energy can have mechanical systems. The only mechanical system in the list is the compressed spring. A car battery and a glowing incandescent lightbulb have electrical energy, a nucleus of atom has potential (internal) energy.

Answer 2

Answer: It's Compressed Spring. I know cuz I took the test and it says what I got right and what I didn't get right