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Water at 40 °C is pumped from an open tank through 200 m of 50-mm-diameter smooth horizontal pipe as shown in Fig. P12.22 and discharges into the atmosphere with a velocity of 3 m/s. Minor losses are negligible.
(a) If the efficiency of the pump is 70%, how much power is being supplied to the pump?
(b) What is the NPSHA at the pump inlet? Neglect losses in the short section of pipe connecting the pump to the tank. Assume standard atmospheric pressure.
a he-xe mixture containing .75 mole fraction of helium is used for cooling of electronics in an avionics application.
Sketch and label velocity triangles for the flow entering and leaving the rotor row. Use V for absolute velocity, W for relative velocity, and U for blade velocity. Assume flow enters and leaves each blade row at the blade angles shown.
Comparison of the infrared intensities of the v = 1 S 2 transition inds a ratio of 0.100 for DI molecules (ve = 1640cm-1 ) in the v = 1 state to HI molecules (ve = 2310cm-1 ) in the v = 1 state. What is the ratio nDI>nHI in the entire sample?
Determine the minimum power input required for this air-conditioning system.
a shaft of radius r and length l is subjected to a uniformly distributed shear. the shaft is fixed at one end and not
1 steam at 3 mpa and 400 c enters an adiabatic nozzle steadily with a velocity of 40 ms and leaves at 2.5 mpa and 300
Twenty-five input signals, each band-limited to 3 kHz, are each sampled at an 8 kHz rate and then time-multiplexed.
A tank of 20 ft3 volume is half-filled with liquid water, and the remainder is filled by vapor at 550 psia. The water is heated until one-half of the liquid (by volume) is evaporated, while an automatic valve lets saturated vapor escape at such a rat..
what is thermal energy storage? how does it differ from thermal energy generation? what role do the terms play in a
Block A has a mass of 5 kg and is placed on the smooth triangular block B having a mass of 30 kg. If the system is released from rest, determine the distance B moves from point O when A reaches the bottom. Neglect the size of blockA.
Calculate the time required to effect a 90 percent purge of the sampler with a flow rate of 125 cm3/min.
the tank has a 180mm diameter and 12 mm wall thickness. knowing that the tank contains compressed air under a pressure of 8 Mpa, determine the magnitude t of applied torque for which the maximum normal stress in tank is 75 Mpa.
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