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A 12-ft^3 rigid tank contains refrigerant-134a at 40 psia and 55 percent quality. Heat is transferred now to the refrigerant from a source at 120 °F until the pressure rises to 60 psia. Assuming the surroundings to be at 75 °F, determine the a) amount of heat transfer between the source and the refrigerant and b) exergy destroyed during this process.
a 2 m3 tank containing nitrogen at 25oc and 500kpa is connected through a valve to another tank containing 3kg of
sea water specific gravity 1.03 leaks into the diesel fuel specifc gravity 0.81 tanks of a ship. diesel fuel and
the 580-ton tug is towing the 1200-ton coal barge at a steady speed of 6 knots. for a short period of time the stern
two carnot heat engines are operating in series such that the heat sink of the first engine serves as the heat source
air enters the compressor of a gas turbine at 100 kpa 300 k and a volumetric flow rate of 5.0 m3s. the air is
a medical warmer operates using a heat pump. saturated r-12 enters the compressor at a temperture of -10 c and exits as
a heater is required to supply the domestic hot water dhw in a 50 unit apartment building where the dhw load is
gusset plate Determine the resultant of the three forces tha must be carried by the gusset plate. 30 degrees off of the wall and F1, F1 = 10k, F2 = 12k, F3 = 18k
determine the equivalent state of stress on an element at the same point oriented 45 degrees clockwise with respect to
a mass of 10 tonnes is moved 20 m across the deck of an ocean vehicle of 10000 tonnes displacement. the ocean vehicle
the density of a liquid is to be determined by an old 1cm diameter cylindrical hydrometer whose division marks are
over a period of time a car engine burns 0.01kg of fuel equivalent to supply of qh from a high temperature reservoir at
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