A 4-kg cat is resting on a bookshelf that is 2 m high. What is the cats gravitational potential energy relative to the floor if the acceleration due to gravity is 9.8m/s^2?

a. 6 J

b. 8 J

c. 20 J

d. 78 J

A mechanical wave moves through a medium, which can be what?

What social science, which deals with the behavior and thinking of organisms, differs from sociology primarily in that it focuses on individual behavior rather than on group behavior?

Which best explains the relationship between the speed of sound and the medium through which it passes?

A spring has a spring constant k of 88.0 N/m. How much must this spring be compressed to store 45.0 J of potential energy

Why are metals good conductors of electric current? Choose one of the followingDo they possess high concentrations of protonsDo they possess low concentrations of protonsDo they possess high concentrations of free electronsDo they possess low

Explain why your weight would be less in the moon than on earth even though your mass would not change. Use the law of universal gravitation in your explanation.

ions are atoms or groups of atoms that have a positive or negative charge. which of the following statements is true of ions?

1. According to the nebular theory, the solar system formed from? A. accretion of protoplanets. B. a large, thin cloud of dust and gas. C. colliding planetesimals. D. all of the above 2.

What is the difference between tangential acceleration and centripetal acceleration?

A ball rolls down a ramp. The ball has a mass of 1 kg and it has 18 joules of kinetic energy. What is the ball's speed?