If the distance between two masses is tripled, the gravitational force between changes by a factor of

A. 1/9

B. 1/3

C. 3

D. 9

What is the difference between O and O2

Dave recorded the effects of staying up late on his energy level. which of these is a control variable?

The motion of a car on a position-time graph is represented with a horizontal line. What does this indicate about the car's motion? A. It's not moving. B. It's moving at a constant speed. O C. It's moving at a constant velocity. OD. It's speeding up.

What area of the united states is characterized by fault block mountains with streams that drain into adjoining basins?

Earth's polar ice caps contain about 2.3 * 1019 kg of ice. This mass contributes essentially nothing to the moment of inertia of the earth because it is located at the poles, close to the axis of rotation.

A 0.25 kg hockey puck is sliding along the ice with an initial velocity of 5 m/s when a player strikes it with his stick, causing it to reverse its direction and giving it a velocity of 30 m/s.

The physiological aim of drive reduction theory is

You are caring for a person who was involved in an automobile collision. The woman is complaining of pain in her abdomen, nausea and extreme thirst. She also is breathing rapidly. Which of the following would you suspect?

A fountain of water and steam that erupts from the ground

A heavy rope, 50 ft long, weighs 0.5 lb/ft and hangs over the edge of a building 120 ft high. how much work is done (in ft-lb) in pulling half the rope to the top of the building?