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A paper mill has two steam generators, one at 4.5 MPa, 300?C and one at 8 MPa, 500?C. Each generator feeds a turbine, both of which have an exhaust pressure of 1.2 MPa and isentropic efficiency of 87%, such that their combined power output is 20 MW. The two exhaust flows are mixed adiabatically to produce saturated vapor at 1.2 MPa. Find the two mass flow rates and the entropy produced in each turbine and in the mixing chamber.
A truck (T) is tied to a car (C), back bumper to back bumper. To you, the viewer, the truck is on the left, and the car is on the right (side view). Both vehicles are at rest. The rope connecting the two is initially slacked. The truck takes off, and..
Derive an expression for the bounding energy Eo in terms of the equilibrium interionic separation ro and the constants D, and p using the following procedure
you are manufacturing a frame for a vehicle out of some aluminum alloy 6061-t451 tubing. the frame is to be welded
a carnot heat pump is to be used to heat a house and maintain it at 25c in the winter. on a day when the average
Find the equations for the trajectories for Case WB (a > 0.0 0. a2 > 40) and Case IVC (α >0. β> 0. α2 = 4β). Are the straight lines indicated in class trajectories? What are the equations describing them
A four-cylinder two-stroke engine operating at 2400rpm produces 55kW of total brake power. The cylinder displacement is 1L. Assume the heat release perks of fuel to be 35MJ and the thermal efficiency to be 30%.
a heat engine accepts 200000 btu of heat from a source at 1500 r and rejects 100000 btu of heat to a sink at 600 r.
A piston-cylinder contains 50 L of saturated liquid R-134a. The piston is frictionless, and has a mass and area resulting in an applied pressure of 500 kPa on the refrigerant. The refrigerant is now heated until its temperature rises to 70 °C. Calcul..
lead experiences corrosion in an acid solution according to the following reaction pb 2h rightarrow pb2 h2 the rates
An engineering member is to be made of 18-Ni maraging steel (vacuum melted). The member is a plate loaded in tension, and it may have a crack in one edge. The dimensions are width b=35 and t=5.0mm, and the crack may be as long as a=7.0 mm.
The value of bulk modulus of a fluid is required to determine A. Reynold's number B. Froude's number
the position of a particle which moves along a straight line is defined by the relation x t3 - 6t2 - 15t - 40 where x
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