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A small air turbine with an isentropic efficiency of 80% should produce 270 kJ/kgof work. The inlet temperature is 1000 K and the exhaust pressure is 100 kPa. Find the required inlet pressure and the exhaust temperature. Assume air is an ideal constant-Cv0 gas.
a cylindrical piston-chamber contains an ideal gas in equilibrium with the surroundings at a temperature of 293 k a
a regional power plant is updating one of its existing 25mw natural gas turbans with a new more efficient model as a
Solve for the pressure of a gas using both equations at a temperature of 400K and a molar volume of 1x 10-4 m3/mol. For the van der Waals EOS, use parameters of a= 4.1x10-1 (m3/mol)2 Pa, and b=4.3x10-5 m3/mol.
determine the force in member of the loaded truss. assume that the four external reactions at and are equal in
a steel thermal diffusivity 0.00001172 k43 cylinder 10 cm in diameter and 10 cm long is initially at 300degc. it is
the water level of a tank on a building roof is 20m above the ground. a hose leads from tank bottom to the ground. the
at the beginning of the compression process of an air-standard otto cycle p1 14.7 lbin2 and t1 530degr. the maximum
the friction force acting at the chip-tool interface the main (tengential ) cutting force is 1500N . Find the orthogonal rake angle of the cutting tool?
an air-standard otto cycle has a compression ratio of 7.5. at the beginning of compression p1 85 kpa and t1 305 k.
the annual cost of operating a heat pump at year-end prices is r with units of yr. the costs are expected to inflate at
if coal that has 2.25 sulfur and a heat content of 13000 btulb is burned in a 40 efficient 400-mw plant estimate the
an instrument having a resonance frequency of 1414 rads with a damping ratio of 0.5 is used to measure a signal of 6000
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