17. The different between length of a certain brass rod and that of a steel rod is claimed to be
constant at all temperature. Is this possible?

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.

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity