How to calculate gravitational potential energy?

A ball rolls down a ramp. A small amount of friction heats up the ball. What energy transformations are taking place?

A wire with a linear mass density of 1.19 g/cm moves at a constant speed on a horizontal surface and the coefficient of kinetic friction between the wire and the surface is 0.250. If the wire carries a current of 1.

A machine is rolling a metal cylinder under pressure. The radius of the cylinder is decreasing at a constant rate of 0.05 inches per second and the volume, V, is 128pi cubic inches. At what rate is the length, h, changing when the radius, r, is 1.

Which of the following is a feature of the color of an object? A. It is a subjective experience, based on the frequencies of light waves the eye receives. B. It is a subjective experience, based on the amplitude of light waves the eye receives. C.

If my weight on Earth is 140lbs, what is my mass?

A bathroom scale is compressed 0.21 in. when a 210 -lb person stands on it. Assuming that the scale behaves like a spring that obeys Hooke's law, how much does someone who compresses the scale 0.06 in.

Explain what happens when a ferromagnetic material is made into a permanent magnet.

You are drawing a branching diagram to show the relationship between Turtles frogs and alligators which two organisms does the diagram indicateas having the most recent common ancestor

Estimate the length of the neptunian year using the fact that the earth is 1.50Ã108km from the sun on average.

Identify one type of electromagnetic energy that has a shorter wave length than green light