Aman drops a baseball off of the top of the empire state building. if the action force is the pull of the earth on the ball, then what is the reaction force?

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?

1kg of water needs to recieve 4200j of energy to go from 90 degrees to 91 degrees. what is the specific heat capacity of water? what are the units?

During the past 150 years in the united states, how did energy consumption compare to population growth