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2 m^3 of air in a rigid and insulated container that is fitted with a paddle wheel assembly. The air starts at 300 K and 200 kPa. The paddle wheel does 750 kJ of work on the system. Assuming the air behaves as an ideal gas with cv= 0.72 kJ/kg-K, find (a) the mass of the air, (b) the final temperature of the air, and (c) the entropy produced.
a closed system of mass 5.3 lb. undergoes a process in which there is a heat transfer of 215 ft-lbf from the system to
consider 2.5 of austenite containing 0.65 wt c and cooled to below 727 degrees c.a what is the proeutectoid phase?b how
What is the total energy stored in the two capacitors when the series combination is connected to the battery?
air in a piston-cylinder device has 400 degrees f 1000 kpa with a volume of 3.5 ft3. combustion heats it to 1500 k in a
A refrigerator with a COP of 3 removes 1.5 kW from the cold space at -9 °C while rejecting heat to the kitchen at 22 °C.
The plate is submerged in a liquid is a vertical position with the parallel sides horizontal and the shorter parallel side at the top and exactly in the surface of the liquid. The static moment of the plate with respect to the surface of the liqui..
1 steam at 3 mpa and 400 c enters an adiabatic nozzle steadily with a velocity of 40 ms and leaves at 2.5 mpa and 300
a compressor operating adiabatically is to compress 2.83 m3min of air at 29.4 c and 102.7 knm2 to 311.6 knm2. calculate
a single-pane glass window is used in a heated dwelling. outside the dwelling the ambient temperature is 0degc while
the force exerted on the cue ball by the cue is horizontal. determine the value of h for which the ball rolls without
1. list three engineering components applications that in your judgment need high stiffness and low weight. what
a refrigerator is to remove heat from the cooled space at a rate of 2300 kjmin to maintain it temperature
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