Aball of mass 100.0g strikes a ballistic pendulum of mass 2.0kg and is caught in the catcher. the center of mass for the pendulum rises a vertical distance of 20.0cm during the collision. determine the initial speed of the ball.

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.