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Air at 4.5 bar, 550 K enters an insulated turbine operating at steady state and exits at 1.5 bar, 426 K. Kinetic and potential energy effects are negligible. Determine
(a) the work developed, in kJ per kg of air flowing.
(b) the isentropic turbine efficiency.
the upside-down steel a frame shown in the figure is to be bolted to steel beams on the ceiling of a machine room using
ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 248c and
a spring-loaded pistoncylinder assembly contains water at 500 c and 3 mpa. the setup is such that pressure is
Determine the total mass of nitrogen (N2), in kg, required to inflate all four tires of a vehicle, each to a gage pressure of 180 kPa at a temperature of 25oC. The volume of each tire is 0.6 m^3, and the atmospheric pressure is 1 atm.
the closed tank is pressurized at 15 psig by air as shown. the liquid is water. determine the velocity of the water
A mass transfer tower operating at 1 atm and 300 K uses water, which enters free of ammonia at the top, to reduce the ammonia (NH3) concentration in air exhausted from a reactor. At one plane (W) in the tower, the concentrations of ammonia in the liq..
a circular tube of outer diameter 5 cm and inner diameter 4 cm is used to convey hot fluid. the inner surface of the
Compute the corresponding volume flow rate if the diameter at A is 5.0 cm. The phenomenon that occurs at a when p2 falls to nearly zero is known as cavitations. The water vaporizes into smallbubbles.
a reversible heat engine operating a 1500 f source and the atmosphere at 0 f produces work to drive a reversible heat
Determine the time required by a diesel-electric locomotive, which produces a constant drawbar pull of 60,000 lb, to increase the speed of an 1800 ton freight train from 20 mi/hr to 30 mi/hr up to 1-percent grade. Train resistance is 10 lb per ton.
A hypothetical element has an atomic weight of 91.6 g/mol, a density of 9.60 g/cm3, and an atomic radius of 0.137 nm. Determine whether its crystal structure is FCC, BCC, or simple cubic.
Estimate the length of the tube and the number of coil turns required to provide an exit temperature of Tm,o = 38°C for the biological fluid. Assume that the water bath is an extensive, quiescent medium,
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