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A fire truck draws water from an open constant-level reservoir through a hose of 0.2 ft2 cross section. The water is discharged from the pump through another 0.2 ft2 hose to a surge tank pressurized to 120 psig with air at the top. The pump adds 970 ft lbf/slug of energy to the fluid. The water level in the surge tank is 3 ft above the pump centerline. From the surge tank the water flows steadily through a hose of 0.04 ft2 area to a nozzle of 0.01 ft2 area. The nozzle exit is held at the same level as the water free surface in the surge tank. Neglect all frictional losses and sketch the system. Find the:
a) speed of the water leaving the nozzle
b) elevation of the pump relative to the reservoir
c) power required to drive the pump if it has an 80% efficiency
d) maximum height above the reservoir that the stream of water exiting the nozzle can reach.
the centerboard of a sailboat is 2.5m long and has a chord of 1m. approximate the centerboard as a flat plate in water
the 1.25 in diameter steel shaft bc is built into the rigid wall at c and supported by a smooth bearing at b. the lever
an airplane moves forward at a speed w1 971 kph. the frontal intake area of the jet engine is a1 0.8 m2 and the
a water cooled spherical object of diameter 10 mm and emissivity 0.9 is maintained at 4000c. what is the net transfer
a 6 nominal pipe size schedule 40 steel pipe has a chamfered entrance and 300 ft. long. the velocity is 20 ft per sec.
a balloon uses hot air to provide its lifting capacity. prior to its release it is tethered to the ground by a steel
the flat plate 1 m in length and 1 m in width is placed parallel to the air stream at 27ordmc 1 atm. the air free
Given a lifting (rotating) cylinder in cross flow of radius a with a lift coefficient of C1=5, calculate the peak (suction) pressure coefficient, Cp. Use potential flow relations and assume 2-D.
a piston cylinder arrangement originally contains 0.1 kg of saturated water vapor at 10 bars. a line with steam flowing
an electrical wire having a diameter of 1.5 mm and covered with a plastic insulation thickness 2.5 mm is exposed to
For a laminar boundary layer flow over a flat plate with air at 20°C and 1atm, the thermal boundary layer thickness Dt is approximately 13% larger than the velocity boundary layer thickness D. Determine the ratio D/Dt if the fluid is ethylene glycol ..
A 7in diameter cylindrical scuba tank made from steel is being designed for an internal pressure of 1600 psi. The allowable stress of the steel is 35 ksi in tension and 16 ksi in shear. Calculate the minimum wall thickness assuming a factor of safety..
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