Suppose a disk is 0.50 cmcm thick and 4.0 cmcm in diameter. If this disk supports half the weight of a 75 kgkg person, by what fraction of its thickness does the disk compress

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Which governments provide garbage collection services to homes and businesses

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)