The phase of the moon you see depends on what?

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.

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

Describe uniform velocity and variable velocity in short