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Determine the maximum work that can be extracted from a pond containing 105 kg of water at 350 K when the temperature of the surroundings is 300 K. Notice that the temperature of water in the pond will be gradually decreasing as energy is extracted from it; therefore, the efficiency of the engine will be decreasing. Use temperature intervals of (a) 5 K, (b) 2 K, and (c) 1 K until the pond temperature drops to 300K.
Twenty ceramic specimens were tested to fracture. The measured fracture loads in N were 279, 195, 246, 302, 255, 262, 164, 242, 197, 224, 255, 269, 213, 172, 179, 143, 206, 233, 246, 295. A. Determine the Weibull modulus, m.
A closed, rigid tank is filled with a gas modeled as an idea gas, initially at 27 degrees C and a gage pressure of 300 kPa. The gas is heated, and the gage pressure at the final state is 367 kPa. Determine the final temperature, in C. The local atmos..
What is the surface absorptivity to direct solar radiation that is incident at an angle of 45° from the normal? What is the absorptivity to diffuse irradiation?
a cast-iron bar 2 in. in diameter and 5 ft. long is surrounded by a shell of structural steel 0.25 in thick. compute
A piston-cylinder device is insulated and contains 0.005 m3 of saturated liquid water at a constant pressure of l50 kPa. An electric resistance heater inside the cylinder is now turned on, and 1800 kJ of energy is transferred to the steam.
Experiments have shown that the transition from laminar to turbulent conditions for flow normal to the axis of a long cylinder occurs at a critical Reynolds number of ReD,c = 2 X 105, where D is the cylinder diameter.
a vehicle has an inline 6 engine with a total displacement of 2979 cm3 and a compression ratio of 10.2. from the
Calculate the force required to punch out a rectangular hole 100m x 50mm in a 2mm thick aluminium sheet. The ultimate strength in shear is 125 MN/m^2.
consider the incompressible-flow field u ax by v cx dy w 0. for what conditions on constants a b c d is this flow
a v belt and v pulleys with a29 degrees are used to transmit a couple from pulley a to pulley b. the radius of each
consider the reversible adiabatic flow of stream through a nozzle. steam enters the nozzle at 1 mpa and 300degc with a
preparing cad geometry for fea element selection meshing and mesh optimisation as well as model simplification. in the
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