As a skateboarder moves downhill, some of the energy of the skateboarder is

A) lost.

B) kinetic.

C) potential.

D) kinetic and some is potential.

How far, in terms of wavelength, does a wave travel in one period?

What energy source would be abundant in california due to its position on a plate boundary?

When a forklift raises an object, is it doing positive or negative work on the object? Which type of work is the force of gravity doing on the object? Explain your answers. This is not a math problem, this is physics.

A seismogram shows that P waves travel a. at the same speed as surface waves. b. more slowly than S waves. c. at the same speed as S waves. d. faster than S waves.

Which of the following statements is true? A. All metals are magnetic. B. All the magnets are made of iron. C. Earth is a giant magnet.

A commercial jet flies at 550mi/hr for 3000mi. For how much time does the jet fly?

If almost any system in stable equilibrium is slightly disturbed, it will then exhibit simple harmonic motion because 1. the change in potential energy is proportional to the cube of the displacement from the equilibrium position. 2.

Is the following statement true or false? Nuclear fission occurs naturally in stars.

Why is it useful to calculate average speed?

Which describes freefall