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A small model of a pump is tested in the laboratory and found to have a specific speed, N equal to 1000 when operating at peak efficiency. Predict the discharge of a larger, geometrically similar pump operating at peak efficiency at a speed of 1800 rpm across an actual head rise of 200 ft.
a scale is constructed using the 10-kg mass the 2-kg pan p and the pulley and cord arrangement. cord bca is 2m long. if
a sphereical interplanetary probe of 0.6-m diameter contains electronics that dissipate 170 w. if the probe surface
Horsepower and efficiency of three-phase motor, If a fully loaded 440V, three-phase motor draws 12.4 A at 86% power factor (pf). It's speed is 1730 rpm and its torque output to a mechanical load is 29.1 lb-ft x 1.356 = 39.5 Nm.
a car with a mass of 1570 kg is supported by four springs each with a spring constant of 25 nmm. in traveling over an
a 15-mm od copper tube conveys hot hydraulic oil. in order to dissipate the heat and cool the oil someone suggests that
a closed tank v 0.35 ft3 containing 10 lbm of water initially at 77f is heated to 350f by a heat pump that is
the compressor of a large gas turbine receives air from the ambient at 95 kpa 20degc with a low velocity. at the
q1. 1.5 kg of oxygen n2 and 0.15 kg of helium he2 are separated by a partition in a vessel.nbsp the nitrogen is at 5
a gear of mass 2.5kg rotates ar 1500rpm.due to an error in manufacture the centre of gravity of the wheel is displaced 0.5mm from the axis of rotation. calculate the out of balance force.
now consider the cooling process. it takes place in a heat exchanger hx. warm air. at 75 f is flows into one side of
air flows through an adiabatic internally reversible compressor at a rate of 0.04 kgs. at the inlet thepressure is 200
initially an insulated rigid tank contains 28.5 kg of water at 23.4oc and 101 kpa. the tank also contains a 3.14 kg
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