Steam enters an adiabatic turbine at 6mpa, 600°c, and 80 m/s and leaves at 50 kpa, 100°c, and 140 m/s. if the power output of the turbine is 10 mw determine (a) the reversible power output and (b) the second-law efficiency of the turbine. assume the surroundings to be at 25°c.

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

On a average work day more than work place firs are reorted

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.