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Several geothermal power plants are in operation in the United States and more are being built since the heat source of a geothermal plant is "free energy". An 8-MW geothermal power plant is being considered at a location where geothermal water at 160C is available. Geothermal water is to serve as the heat source for a Rankine power cycle with R-134a as the working fluid. Limiting the design to a single reheat pass and a single feedwater heater (open or closed), determine the optimal pressures, temperatures, and fraction of steam extracted to maximize thermal efficiency.
The car travels up the hill with a speed of v = (0.4s) m/s, where s is in meters, measured from A. Determine the magnitude of its acceleration when it is at point s = 50 m, where p = 500 m.
for a vertical cylinder with an electric heater 2500watt at the basean inletlower part of cylinder with cold water at
Acceleration was uniform. If it assumed that the acceleration was uniform where the magnitute of the volocity of an airplane was changed from 120mph to 360mph in 6 seconds.
a stationary radar operator determines that a ship is 19 km south of him. an hour later the same ship is 16 km
Diffusion Coeffiecient, Calculate Constant, The diffusion coeffiecient for Cr^+3 in Cr2O3 is 6x10^-15 cm2/s at 727 degrees Celcius and is 1x10^-9 cm2/s at 1400 degrees Celcius.
The diffusion constant (Do) and activation energy (Q) of C in BCC Fe is 0.01 cm2/sec and 80kJ/mol respectively. In FCC Fe, the values are 0.21 cm2/sec and 148kJ/mol. At exactly 910oC these two phases can co-exist.
During the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the work input during this process. R(air)=287j/KgK
air is compressed under steady flow conditions see figure q3. the power input to the compressor is 3 kw. during the
Determine the minimum distance from a 50 ft height building from which the ball can be thrown and not hit the side of the building , but it may land on the roof depending upon how long the building is.
A bullet is fired horizontally into a wood block resting on a horizontal, frictionless surface. If the mass of the bullet is 0.02 Kg and the velocity is 600 m/s
a cylindrical bar of aluminum 19 mm 0.75 in in diameter is to be deformed elastically by application of a force along
Estimate the energy that must have been supplied to cause the specimen to reach failure.
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