Jim pushes hard on a rock that weighs 500 pounds. He pushes with a force of 50 pounds, but the rock doesn't move. How much work did Jim do?

What can waxing replace?

State laws of electromagnetic induction

Explain why a magnet from your refrigerator could not be used to life something as heavy as a car?

A ball on a string makes 25.0 revolutions in 9.37 s, in a circle radius 0.450 m. What is it's velocity?

If a kiteboarder sails across the water at 40 km/hr, how far has she traveled in 15 minutes

Which of the two resistors dissipates the larger amount of power?

Three students derive the following equations in which x refers to distance traveled, v the speed, a the acceleration (m/s^2), and t the time, and the subscript (0) means a quantity at time t=0: a) x=vt^2 + 2at, b) x=v0t+1/2at^2, and c) x=v0t+2at^2.

Which is a use of fiber optics?

When a positively charged conductor touches a neutral conductor, the neutral conductor will:

Definition of the rule E=mc^2