Imagine tying a string to a ball and twirling it around you. How is this similar to the moon orbiting Earth? In this example, what is providing the constantly changing, inward force?

Byron wanted to try out different watercraft. He went 124 miles downstream in a motorboat and 45 miles downstream on a jet ski. His speed on the jet ski was 10 mph faster than in the motorboat. Byron spent a total of 4 hours on the water.

A spring with a constant of 16 N/m has 98 J of energy stored in it when it is extended. How far is the spring extended?

When may it be a good idea to use scientific notation or Si prefixes?

Why does a car burn more gasoline traveling in a city than it does traveling on an interstate?

Electromagnetic energy travels inselect one: a. long stringsb. short stringsc. burstsd. waves

What is the most useful property of semi-metals

Which of the following is most likely to have a volume of 75 cm³? A. a stereo system B. a laptop computer C. a portable mp3 player D. a plasma screen television

What was Issac Newton's contribution to our understanding of the fundamental forces of the universe? (Gravity, electromagnetic, strong force, weak force)

Q1) A motor has a rating power of 20 W and motor is used for 10 s. Calculate the energy supplied to the motor,

Why can't the efficiency of a heat engine be 100%?