One horsepower (1 hp) is the unit of power based on the work that a horse can do in one second. this is defined, in english units, as a force of 550 lb that can move an object 1 foot in 1 s. in si, 1 hp equals 745.7 w, or 745.7 j of work delivered in 1 s. suppose you have a horse that delivers 745.7 w of power, but that it does the work in only 0.55 s. how much work has this horse done?

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)