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A cutting tool uses a nozzle that generates a high speed jet of liquid water (water temperature: 20 °C). Assume an exit velocity of 500 m/s with a jet diameter of 2 mm, at steady state.
(a) Determine the mass flow rate of liquid water through the nozzle.
(b) Determine the pump power required to generate this water jet from a steady supply of 20 °C liquid water at rest. Assume the specific enthalpy of the water at the inlet of the pump and at the exit of the nozzle to be the same.
Using a centrifugal pump, and a flow rate of 60 gal/min, calculate the break hp of the pump using water with a density of 62.4lbm/ft3 and do the same for a nonviscous liquid having a density of 0.85g/cm3.
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