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Answer to Question #152180 in Mechanical Engineering for erikha
Question #152180
A 500 cubic feet per minute of air enters a system whose density is 0.075 lbm/ft3 and discharges it with a density of 0.34 lbm/ft3. The pressure at the suction is 10 psia and at the discharge is 80 psia. The increase in the specific internal energy is 35.8 BTU/lbm. Determine the work in Hp.
Expert's answer
"m = \\rho V"
"m= 0.075 \\times 500 = 37.5" lb/min
According to the balancing work equation
"w= \\frac{-2384.378}{42.4}"
= 56.235 hp
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A pump delivers 50 kg/s of water from 100 kPa to 300 kPa. The inlet and discharge piping are on the same level, but the diameter of the inlet piping is 16 cm, whereas that of the discharge piping is 11 cm. Determine the work done in kW.
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