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A model is to be built for studying the performance of a turbine having a runner diameter of 3 ft, maximum output of 2200 kW under a head of 150 ft and a speed of 240 rpm. Determine the diameter of the model runner and its speed if the corresponding model power is 9 kW and the head is 25 ft.
An alternating copolymer is known to have a number-average molecular weight of 100000 g/mol and a degree of polymerization of 2210. If one of the repeat units is ethylene, which of styrene, propylene, tetrafluoroethylene, and vinyl chloride is the ot..
in a tensile test for an alloy used for ballistic-missile launch tubes on boomer submarines the yield strength was
steam enters a nozzle at 8 mpa 400oc with a velocity of 36.9 ms. at the exit of the nozzle the pressure and temperature
a piston-cylinder device contains 5 kg of refrigerant-134a at 0.7 mpa and 60 degrees c. the refrigerant is now cooled
a stunt driver travels a total distance of 1172 feet moving at a constant speed of 40 miles per hour while weaving
A dockworker applies a constant horizontal force of 71.0 to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 11.5 in a time 5.00 . what is the mass of the ice block?
A Carnot refrigerator using R-134a absorbs heat from a refrigerated space at 0oC and rejects heat to a kitchen at 27oC.The refrigerant enters the evaporator with a quality of zero and exits with a quality of one. The operating pressure of the evapora..
A paddle wheel and an electric heater operate in a system. If the torque is 200 N-m, the rotational speed is 400 rpm, the voltage is 20 V, and the amperage is 10 A, What is the rate of doing work?
Along the abscissa, show the time in working days and in percentage of project duration.
one pound-mass of water at 600f expands against a piston in a cylinder until it reaches an ambient pressure of 14.7psi
Calculate the throat and exit areas of a nook to expand air at the rate of 4.3 kg/s from 8.3 bar. 327 °C into a space at 1.13 bar. Neglect the inlet velocity and assume isentropic flow.
A water pump is driven by a steam turbine. The steam at the inlet is at 10 bars and 280 C, and leaves the turbine at 1.5 bars. Saturated liquid water enters the pump at 20 C at 100,000 kg/hr, and the water exits at 100 bars.
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