1) Air is heated electrically in a constant-diameter tube in a steady-flow process. At the entrance,...

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1) Air is heated electrically in a constant-diameter tube in a steady-flow process. At the entrance, the air has a velocity of 5 m/s and is at 350 kPa, 25C. The air exits at 320 kPa, 90C. Calculate the velocity at the exit and the mass flow rate per unit area. 2) The compressor of a large gas turbine receives air from the surroundings at 97 kPa, 27C. At the compressor outlet, the pressure is 390 kPa; the temperature is 190C, and the velocity is 100 m/s. The power input to the compressor is 2000 kW. Determine the mass flow rate of the air. 1) Air is heated electrically in a constant-diameter tube in a steady-flow process. At the entrance, the air has a velocity of 5 m/s and is at 350 kPa, 25C. The air exits at 320 kPa, 90C. Calculate the velocity at the exit and the mass flow rate per unit area. 2) The compressor of a large gas turbine receives air from the surroundings at 97 kPa, 27C. At the compressor outlet, the pressure is 390 kPa; the temperature is 190C, and the velocity is 100 m/s. The power input to the compressor is 2000 kW. Determine the mass flow rate of the air.