When light is put off, a spark is produced across a

switch. Why?

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%?