Almost all of the electricity that people use is

produced by

1. motors.

2. batteries.

3. transformers.

4. generators.

What is internal energy?

What is the average speed in km/h of a car that travels 160km for 2h?

Briefly explain how an electric generator works.

If the activation energy required for a chemical reaction were reduced

In the bottom of death valley, you will find layers of gravel deposited by rivers. based on materials presented in class, what is a likely explanation for this occurrence of river gravels in the valley bottom?

A microwave oven operating at 120 volts is used to heat a sandwich if the oven draws 12.5 amperes of current for 45 seconds what is the power dissipated by the oven?

Which of the transformers are step-up transformers? Which of the transformers are step-down transformers?

1 A plane moving at 30m/s drops a load 200m down to the ground. How long did it take to hit the ground.

Can a body be in equilibrium if it is in motion? Explain

What is the average speed in kilometers per second of the earth around the sun?