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A simple steam power system has a turbine inlet state of 6.0 MPa and 540 0C and an exhaust pressure 0.008 MPa. The cooling water in the condenser experiences a temperature rise from 20 to 27 0C and T0 is 20 0C. The adiabatic efficiencies of the turbine and pump are 85 and 70 percent, respectively. Determine, in kJ/kg of steam,The availability changes across the two turbine stages, condenser, reheat section, boiler and pump
neil a. armstrong was the first person to walk on the moon. the distance between the earth and the moon is 3.85 108 m.
for the following cross sectiondetermine the coordinates x and y of the centroid c of the area shown in the
Characterize the three basic materials (metals, ceramics and polymers) in regarding to modulus of elasticity, strength, ductility and coefficient of thermal expansion.
initially an insulated rigid tank contains 2.01 kg of water at 277.7oc and 1 mpa. a heater in the wall of the tank
a pure jet engine propels an aircraft at 250 ms through air at 45 kpa and -13 degc. the inlet diameter of this engine
a projectile is launched at a with a spped u and 45 degree launch angle. if the peak of the trajectiry is at 8 km from
an insulated piston-cylinder device initially contains 0.3 m3 of carbon dioxide at 200 kpa and 27 ordmc. an electric
a rigid tank is divided into two equal parts by a partition. one part of the tank contains 9.2 kg of compressed liquid
water vapor enters a compressor at 50 kpa and 150 c and leaves at 400 kpa with the same specific entropy as at the
Assume you are given a spherical joint where the ball has a radius of 20 mm and socket has a radius of 22 mm. If the contact load is 50 N, E = 210 GPa, and ν = 0.3, determine (a) the radius of the contact area, (b) the maximum contact pressure.
a pulley with diameter d 27in weighs 80 lb. it is mounted on a diameter d 2-in axle. a weight of 1000 lb is to be
a solid object of aisi 302 steel at a temperature of 850?c is quenched in mineral oil at a temperature of 25?c. the oil
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