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Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Question
In an open system, 500 kg/h of air is being compressed from 100 kPa at
280 K to 600 kPa and 400 K. The air enters the compressor at a linear
velocity of 50 m/s and leaves at a velocity of 100 m/s. The power required
for the compressor is 50 kW, and the heat loss from the turbine is
estimated to be 10,000 kJ/h. Determine the specific enthalpy change that
associated with the process. The process is in steady state and has no
change in its mass flow. (1 kW = 3600 kJ/h)
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- A mass flowrate of 1 Ibm/s of water at 80 F and 70 pisa is mixed with 1 Ibm/s of saturated vapor water at 70 psia in a mixing chamber. During this process 100 Btu/s of heat is lost from the mixing chamber to the surrounding environment. The exiting stream leaves the mixing chamber at 70 psia. In the question that follows, select the answer that is closest to the true value. What is the quality of the exiting stream ?arrow_forwardAir enters an adiabatic chamber steadily at 300kPa, 200 C, and 45 m/s. It leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 110cm^2. The molar mass is 29 g/mol. Determine the density of the air at the inlet of the nozzle. DeterMine the mass flow rate of air through the nozzle. Knowing the specific enthalpy of air at the inlet is 475 kJ/kg, use energy balance to determine the specific enthalpy of air at the outlet of the nozzle. Calculate the change in specific entropy between the inlet and outlet of the nozzle.arrow_forward
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