Asap ! explain why it is easier to move a heavy box on a dolly than it is to slide the box over the ground. (hint: discuss different types of friction)

Picture a all traveling at a constant speed around the inside of a circular structure. is the ball accelerating? explain your answer

Will a heavier bowling ball hit pins better than a lighter bsll

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)