The efficiency of an average gasoline powered car is about 20%. This means

What energy transformation takes place when a radio is plugged in and turned on?

Which units are used for measuring energy?

On a summer day, asphalt is hot on your bare feet because the asphalt has _______ heat from the sun.

Putting reflecting films on your car window helps keep the interior cool by

Which statement BEST describes what happens to water molecules when the temperature of liquid water is increased?

A fire is used to drive a steam engine which moves a locomotive (train). Which of these forms of energy is used to move the locomotive?

Which statement about heat transfer is true?

A group of students walk into a cold classroom. After several minutes, they feel as though the temperature in the room has increased. Which of these statements BEST describes why the room feels warmer to the students?

A car was sitting in sunlight all day long. The heat that is in the car now was transferred into the car by which of the following processes?

Solar panels used light energy from the sun to create electricity. Which of these statements describes what happens to the energy during this process?

Most computers have fans to keep the computer from overheating. Which of these BEST describes why this is necessary?

Which examples best demonstrates the process of conduction?

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