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Air is compressed from an initial temperature of 20 °C and pressure of 100 kPa to a final pressure of 1000 kPa. The isentropic efficiency of the compressor is 0.85. Find the exit temperature of the air and the specific work for the compressor. Assume variable specific heats.
Air is expanded in an adiabatic nozzle from an initial temperature of 800 °F and pressure of 150 psia to a final pressure of 20 psia. The isentropic efficiency of the nozzle is 0.95. Determine the exit velocity and exit temperature of the air. Assume constant specific heats.
A heat pump is designed to deliver 48000 BTU/hr into a residence and operates with a COP of 4.0. The inside of the house is maintained at 75 °F when the outside temperature is 15 °F. Determine the entropy generated by this device.
Ten kg of water is in a closed rigid container with a volume of 0.73 m3 and a temperature of 1000 °C. Determine the entropy generated as the temperature is reduced to 200 °C by transferring heat to a 20 °C environment.
air flows into the narrow gap of height h between closely spaced parallel disks through a porous surface as shown. use
steam enters a nozzle with a low velocity at 300f and 30 psi and leaves as saturated vapor at 10 psi. there is heat
question a 80 g frisbee is thrown from a point 0.71 m above the ground with a speed of 10 ms. when it has reached a
a pitot static probe is used to determine the airspeed of an airplane that is flying at an altitude of 6000m. if the
the crate containing 40 bricks sits on a slopped conveyor belt which is used to raise the crate to the next level of
The 10-kg block rests on the platform for which = 0.4. If at the instant shown link AB has an angular velocity = 2 rad/s, determine the greatest angular acceleration of the link so that the block doesn't slip.
a 32 lb weight is attached to the end of a spring with spring constant k 24 lbf. if the resistive force is 10 dxdt
air within a piston-cylinder assembly initially at 12bar 327 degree celcius undergoes an isentropic expansion to
what kind of metals are often recommended for use at low temperatures particularly when any sudden loading of the part
i need you to write a report about heat treatment of steel. i will attach the report format which you need to stick
a rectangular sunk key 16mm x 12mm thick x 80mm long is required to transmit 1500kn-mm torque from 60mm
an oil pump is powered by a 5kw electric motor. the pressure at the outlet and the inlet of the pump at full load is
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