En cierta casa con energía solar, se almacena energía del sol en barriles llenos con agua. En lapso de cinco días nublados de invierno, se necesitaron 5,22GJ para mantener el interior de la casa a 22°C. Suponiendo que el agua de los barriles estuviera a 50°C. ¿Qué volumen de agua se necesitó? c= 4190 J/kg. K

The slope of a velocity time graph over any interval of time gives the during that interval

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)

Object a has a length of 3 cm, a width of 2 cm, and a height of 4 cm. object b is dropped into a graduated cylinder. it displaces 19 ml of water. the volume of object a is: a: greater than the volume of object b b: less than the volume of object b c: equal to the volume of object b