Arecent study has shown an increase in the number of predators in an ecosystem. which of the following is a possible cause for the growth? a. a decrease in the population of prey it feeds on. b. an increase in the population of prey it feeds on c. a decrease in the biodiversity of the ecosystem d. an increase in the number of predators that feed on it select the best answer from the choices provided a b c d

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)