Aperson has a mass of 42.0-kg. what is the persons weight on the moon?

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

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?