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air flows into a heat engine at ambient conditions 100 kpa 300 k energy is supplied as 1200 kj per kg air from a 1500 k
air enters an adiabatic nozzle at 60 psia and 1020degf with low velocity and exits at 800 fts if the isentropic
air enters a steady-flow turbine at 1600 k and exhausts to the atmosphere at 1000 k the second law efficiency is 85
air enters a frictionless duct with v1 70 ms t1 600 k and p1 350 kpa letting the exit temperature t2 vary from 600
air enters a 30-cm-diameter cooling section at 1 atm 35degc and 60 percent relative humidity at 120 mmin the air is
air enters a 28-cm diameter pipe steadily at 200 kpa and 20degc with a velocity of 5 ms air is heated as it flows and
air at 7degc enters a turbojet engine at a rate of 16 kgs and at a velocity of 300 ms relative to the engine air is
air at 1 atm 15degc and 60 percent relative humidity is first heated to 20degc in a heating section and then humidified
acetylene gas at 25oc is burned with 140 theoretical air which enters the burner at 25c 100 kpa 80 relative humidity
a water jet that leaves a nozzle at 60 ms at a flow rate of 120 kgs is to be used to generate power by striking the
a vertical 12-cm diameter piston-cylinder device contains an ideal gas at the ambient conditions of 1 bar and 24degc
a valve in a cylinder has a cross sectional area of 11 cm2 with a pressure of 735 kpa inside the cylinder and 99 kpa
a vacuum gage indicates that the pressure of carbon dioxide in a close tank is - 10 kpa a mercury barometer gives the
a vacuum gage connected to a tank reads 15 kpa at a location where the barometric reading is 750 mm hg determine the
a vacuum gage connected to a chamber reads 35 kpa at a location where the atmospheric pressure is 92 kpa determine the
a u-tube manometer filled with water density 1000 kgm3 shows a height difference of 25 cm what is the gauge pressure if
a turbine receives air at 1500 k 1000 kpa and expands it to 100 kpa the turbine has an isentropic efficiency of 85 find
a steam turbine has an inlet of 2 kgs water at 1000 kpa 350oc and velocity of 15 ms the exit is at 100 kpa x 1 and
a steam power plant operates on a simple ideal rankine cycle between the pressure limits of 1250 and 2 psia the mass
a ski lift has a one-way length of 1 km and a vertical rise of 200 m the chairs are spaced 20 m apart and each chair
a room is heated as a result of solar radiation coming in through the windows is this a heat or work interaction for
a room contains 50 kg of dry air and 06 kg of water vapor at 25degc and 95 kpa total pressures the relative humidity of
a river flowing steadily at a rate of 240 m3s is considered for hydroelectric power generation it is determined that a
a rigid tank contains an ideal gas at 300 kpa and 600 k now half of the gas is withdrawn from the tank and the gas is