How is a quarter wavelength in the pipe
going to change the math?

6–55 refrigerant-134a enters the condenser of a residential heat pump at 800 kpa and 358c at a rate of 0.018 kg/s and leaves at 800 kpa as a saturated liquid. if the compressor consumes 1.2 kw of power, determine (a) the cop of the heat pump and (b) the rate of heat absorption from the outside air.

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain