Two people are paddling a row boat. Together they exert a horizontal force of 500 N toward the back of the boat. The water resists (opposite direction) the motion of the boat with a force of 200 N. If the combined mass of the boat and the two people in it is 200 kg, what is the acceleration of the rowboat? *

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)