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Air at 17oC and 200kPa is in a rigid, 2m3, insulated tank that has a paddle wheel in it. 733 kJ of work is put into the system by the paddle wheel. How much entropy is produced?
Steam enters a diffuser at 20 psia and 240oF with a velocity of 900 ft/s and exits as saturated vapor at 240oF and 100 ft/s. The exit area of the diffuser is 1 ft2. Determine (a) the mass flow rate of steam and (b) the rate of entropy generation.
A cylindrical specimen of some metal alloy 8.7 mm in diameter is stressed in tension. A force of 1390 N produces an elastic reduction in specimen diameter of 0.0041 mm. Calculate the elastic modulus (in GPa) of this material if its Poisson's ratio is..
at the beach atmospheric pressure is 1025 mbar. you dive 15 m down in the ocean and you later climb a hill up to 250 m
a fluid flows in a certain length of cast iron pipe of 30 cm diameter with a mean velocity of 2.5 ms and head loss of
a steel shaft 120 mm in diameter is supported in flexible bearings at its ends. two pulleys each 500 mm in diameter are
A tank at an elevation of z1 = 15 m contains 0.005 kg of saturated liquid H2O at T1 = 200 C and is attached to a paddle wheel. Take the reference state to be T0 = 25 ?C and p0 = 101.3 kPa. Compute the exergy transfer due to the process and the amount..
a thin-walled uninsulated 0.3m diameter duct is used to route chilled air at 0.05kgs through the attic of a large
A fire truck draws water from an open constant-level reservoir through a hose of 0.2 ft2 cross section. The water is discharged from the pump through another 0.2 ft2 hose to a surge tank pressurized to 120 psig with air at the top. The pump adds 970 ..
A similar measurement is made applying the force parallel to one of the cube axes. Explain why the two measurements give different values of the elastic modulus.
a sled of mass m is given a kick on a frozen pond. the kick imparts to it an initial speed of 1.70 ms. the coefficient
a satellite in earth orbit has a mass of 108 kg and is at an altitude of 1.99 106 m.a what is the potential energy of
Refrigerant 22 enters the valve of a refrigeration system with a pressure of 14 bars and a temperature of 32 C and exits at a pressure of 4 bars. Neglecting heat transfer and any changes in potential and kinetic energy, determine the quality of the r..
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