Our friend peter back at the zoo is using a crane to lift an elephant into an enclosure. the elephant weighs 10,000 n. the crane lifts the elephant 5 meters in 25 seconds. how much power was used to accomplish this task?

Lets say that an object of a certain volume has a certin mass. what happens to its mass when you double its volume?

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

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?