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Steam enters a heat exchanger operating at steady state at 250 kPa and a quality of 90% and exits as saturated liquid at the same pressure. A separate stream of oil with a mass flow rate of 29 kg/s enters at 20C and exits at 100C with no significant change in pressure. The specific heat of the oil is c = 2:0/kJkg K. Kinetic and potential energy efects are negligible. If heat transfer from the heat exchanger to its surroundings is 10% of the energy required to increase the temperature of the oil, determine the steam mass flow rate, in kg/s.
one pound of nitrogen as an ideal gas expands isothermally at 70degf from a volume of 1 ft3 to a volume of 2 ft3.
a calculate the number of electrons in a small electrically neutral silver pin that has a mass of 8.0 g. silver has 47
if block d weighs 300 lb and block b weighs 275 lb, determine the required weight of the block c and the angle theta for equilibrium.
consider a steam power plant with reheat that operates on a modified rankine cycle. steam enters the high-pressure
a flow is described by velocity field vaibxj where a 2 ms and b 1 1s coordinates are measured in meters. a obtain
calculate the enthalpy change of the universe during the process. Cp=Cv = 4.18 kj/kgK
a curved nozzle assembly that discharges water to the atmosphere is shown. The nozzle mass is 4.5 kg and its internal volume is 0.002 m^3. The fluid is water. determine the reaction force exerted by the nozzle on the coupling to the inlet pipe.
a student measures g the acceleration of gravity repeatedly and carefully and takes a final measurement of 9.5 ms2. his
steam enters a well-insulated turbine at 10bar 300oc and 50ms and exits at 1bar and 100ms. calculate the steady-state
a 2.0 kg of water at 90 deg. c and 1 bar is placed in a vertical cylinder and sealed with a massless piston. the piston
a thin 1 mm thick ?-iron membrane at 250degc is subjected to an atmosphere of hydrogen gas on one side and the
a shaft is to be designed to support the spur pinion and helical gear shown in the figure on two bearings spaced 700 mm
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