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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 uniform bar ab of mass m 1.00 kg and length l 30.0 cm lies a horizontal plane. an additional mass m 1.00 kg is
a heat engine with a thermal efficiency of 40 receives heat from a reservoir at a temperature of 300of and rejects heat
1.7 lbm object falling at 162 fts enters a viscous liquid and is essentially brought to rest before it strikes the
Calculate the maximum energy that a 3-MeV alpha particle can transfer to an electron in a single collision
moist air at standard conditions in an indoor building space has a dry bulb temperature of 72f and relative humidity
an electric motor weighing 750 lb and running at 1800 rpm is supported on four steel helical springs each having eight
a piston-cylinder assembly contains 1kg of water initially occupying a volume of 0.5m3 at 1bar. energy transfer by heat
Prepare a 3-input, 5 bit multiplexer that fits in a 24-pin IC package. Write the truth table and draw a logic diagram and logic symbol for the multiplexer.
Every other day, the pile is aerated by throwing the mixture into a new pile. Draw a graph showing the temperature in the pile during the first two weeks and explain why this occurs.
An accelerometer is used to measure vibration of a motor mount. The steady state vibration has amplitude of 10g at a frequency of 7.5 Hz.
a projectile is fired at an angle of 62deg from the horizontal with a velocity of 704 ftsec. if it lands 4.75 seconds
an automobile is modeled as a single-degree-of-freedom system vibrating in the vertical direction. it is driven along a
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