iron and copper ball A and B having equal masses and temperature of 200 degree Celsius each are kept on wax slab. Which one makes a deeper hole. Explain with reason

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.

How would a small bar magnet be oriented when placed at position x?

If a stone with an original velocity of 0 is falling from a ledgeand takes 8 seconds to hoybthe ground whays the final velocity of the stone