chemical -> mechanical -> heat mechanical -> heat -> chemical heat -> mechanical -> chemical mechanical -> nuclear -> heat
I gave my students this multiple choice question: A student rapidly rubs the palms of both hands together. Which sequence correctly describes the energy transformations that occur?

Only one answer is correct among these 4 choices:
- chemical -> mechanical -> heat
- mechanical -> heat -> chemical
- heat -> mechanical -> chemical
- mechanical -> nuclear -> heat

Could you tell me which one is correct?

chemical -> mechanical -> heat