Question

which of the following is an example of energy transfer by convection? you create heat by rubbing your hands together. an electric current warms up a tv. a refrigerator cools the air within it, which in turn cools food.

Explanation:

• Rubbing hands creates heat via friction (conduction/mechanical to heat), not convection.
• An electric current warming a TV is electrical energy to heat (not convection).
• A refrigerator cools air (a fluid), and the cooled air (moving fluid) transfers heat to cool food, which is convection (heat transfer via fluid movement).

Answer:

A refrigerator cools the air within it, which in turn cools food.