Question

question: suppose you rub two surfaces together or strike a piece of metal with a hammer. either of these examples is a/an ____ source of heat energy. answer input: spelling counts but capitalization doesnt.

Explanation:

Rubbing surfaces or striking metal with a hammer involves doing work (mechanical action) that converts mechanical energy into heat energy. This process is known as a mechanical source of heat, as the heat is generated through mechanical means like friction or impact.

Answer:

mechanical