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Air in a piston-cylinder is compressed from 100kpa, 25 degrees Celsius to 650kpa, 200 degrees Celsius. Using the ideal gas model, determine the change in specific entropy if the process is a) internally reversible and b) internally irreversible.
a 3-ft3 rigid tank initially contains r-134a at 120 psia and 100 percent quality. the tank is connected by a valve to a
a brake system applies a resistive torque of 25 n. how many revolutions will occur if a 300 kg solid wheel of diameter
the unit cell for uranium has orthorhombic symmetry, with a, b and c lattice parameters of 0.286, 0.587 and 0.495nm, respectively. if its density, atomic weight, and atomic radius are 19.05g/cm3, 238.03g/mol and 0.1385 nm respectively, compute the..
a massive precisely machined 6-ft-diameter granite sphere rests upon a 4-ft diameter cylindrical pedestal as shown in
a bar and fulcrum lever is being used to lift a 100lb rock. the lever is 10ft and the fulcrum is 2 ft from the rock.
an air standard otto cycle has a compression ratio of 9.5. at the beginning of the isentropic compression the working
assuming a transition reynolds number of 5 x 105 determine the distance from the leading edge of a flat plate at which
A turbine uses steam at 25MPa and 650°C at the turbine inlet to generate 17.5MW of power. The steam enters the turbine at a rate of 90000kg/h. A portion of the steam passing through the turbine is removed for the purposes of feedwater heating (Figure..
the low-temperature reservoir of a carnot heat engine is at 10 c. to increase the efficiency of this heat engine from
a steel rod of 4m length is attached at both ends at 30 degree c. the coeff of thermal expansion is 11 10-6 and moe
design a fire resistant safety sphere with diameter of 0.5m that will protect its combustible contents from fire which
a gas refrigeration system using air as the working fluid has a pressure ratio of 5. air enters the compressor at 0
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