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H2O as saturated liquid/vapor mixture enters a counterflow heat exchanger operating at steady state at 0.7 bar with a specific enthalpy of 2431.6 kJ/kg and exits at the same pressure as saturated liquid. The steam mass flow rate is 1.5 kg/min. A separate stream of air with a mass flow rate of 100 kg/min enters at 30 degree C and exits at 60 degree C. The ideal gas model, with a constant cp = 1.005 kJ/kg*K can be assumed for the air. Kinetic and potential energy effects are negligible. Determine a) the quality (x) of the entering H 2O and b) the rate of heat transfer (Q) between the heat exchanger and its surroundings, in kW.
a pure jet engine propels an aircraft at 330 ms through air at 60 kpa and 0 degrees celsius. the inlet diameter of this
One kilogram of air as an ideal gas executes a Carnot power cycle having a thermal efficiency 50%. The heat transfer to the air during isothermal expansion is 50 kJ. At the end of the isothermal expansion, the pressure is 574 kPa and the volume is..
How is the mechanical deformation energy defined? How do you calculate the work of fracture of a brittle material?
A tensile specimen of cartridge brass sheet has a cross section of 0.320 in. × 0.120 in. and a gage length of 2.00 in. Calculate the engineering strain that occurred during a test if the distance between gage markings is 2.35 in. after the test.
a piston-cylinder device initially contains 0.25 kg of nitrogen gas at 130 kpa and 180degc. the nitrogen is now
a baggage conveyor is used to unload luggage from an airplane. the 10 kg duffel bag a is sitting on top of the 20 kg
what is the velocity of the cart when the bullet becomes embedded int he terget? during the firing, the man remains at the same position on the cart. neglect rolling resistance of the cart.
a tank of 2m3 volume contains saturated ammonia at a temperature of 40c. innitially the tank contains 50 liquid and 50
the drinking water needs of a residential hall with 20 students is to be met by a bubbler type water fountain. the
a cylinder subjected to internal pressure pi only is made of cast iron having ultimate tensile strengths in tension and
some skin divers go as deep as 50.0 m. what is the gage pressure at this depth in fresh water and what is the ratio of
a truck is traveling at v0 60mph when the driver applies the brakes to come to a stop. the deceleration of the truck
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