Take a bathroom scale into an elevator. Step on the scale.
What happens to the reading on the scale as the elevator begins to move upward? to move downward?

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.

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

What occurs during a combustion reaction