Select any and all of the following statements that are false. select all that apply. a : stationary electric charges act like magnetic poles. b : magnetic monopoles are only found at the core of stars. c : magnetic poles always come in pairs. d : stationary electric dipoles have magnetic fields. e : magnetic fields are always static.

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)