An above ground Swimming pool of 30ft diometer and • 5ft depth is to be filled from a garden hose (smusit Interior) . of length loft and diameter 5 in. If the pressure at the faucet to which the hose is attached remains at 55 psi how long will it take to fill the pool ? The water exits the hose as a free Jet 6 Ft above the faucet.

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)

The ph is the a.independent variable b.the dependent variable c.control group

Which is an example of an exothermic process?