A5-gram [g] rubber ball is released from a height of 8 meters [m] above a flat surface on the moon. gravitational acceleration on the moon is 1.62 meters per second squared [m/s2]. assume that no energy is lost from frictional drag. what is the velocity, in units of meters per second [m/s], of the rubber ball the instant before it strikes the flat surface?

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.