Two brothers are sitting on a wide bench on a carnival carousel. aiden sits at a distance r away from the center of the carousel. daniel sits at a distance 0.75r away from the center after the carousel begins moving in uniform circular motion, what is the ratio of daniels centripetal acceleration to aidens centripetal acceleration? a. 3: 4 b. 1: 1 c. 9: 16 d. 4: 1

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)