a girl whose mass is 40kg walk up a flight of 20steps each 15mm hight in 10seconds. find power developed by the girl showing the solution​

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)