Which of the following processes involves heating up water by doing work on it?

Question

Which of the following processes involves heating up water by doing work on it?

Group of answer choices

Stirring it vigorously

Putting it in a microwave oven

Exposing it to sunlight

Lighting a fire under it

Answer 1

Hey Xochitl,

For an object to "heat up", its internal energy must be increasing (by definition). For something's energy to increase, this means that something is doing work on it (again, by definition). So, anything that heats up water will be "doing work on it". Hope this helps.