Which of the following statements is supported by the picture shown above?

A. The Earth has a magnetic field that can be detected with a compass.

B. The Earth is orbited by one moon.

C. Three-fourths of the Earth's surface is covered by a thin layer of water.

D.
The Earth is made mostly of rock.

Which of the following are appropriate acceleration units?

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.