Apparent weight. A superhero of mass 75 kg stands on a bathroom scale in an elevator. Find the reading on the scale if the elevator: a) moves upwards at constant speed of 3 m/s. b) moves downwards at constant speed of 3 m/s. c) moves upwards and speeds up at a rate of 3 m/s2 d) moves upwards and slows down at a rate of 3 m/s

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.