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A centrifugal pump is used to raise water against a static head of 18.0 m. The suction and delivery pipes, both 0.15 m diameter, have, respectively, friction head losses amounting to 2.25 and 7.5 times the dynamic head. The impeller, which rotates at 1450 rev/min, is 0.25 m diameter with eight vanes, radius ratio 0.45, inclined backward at β'2 = 60°. The axial width of the impeller is designed so as to give constant radial velocity at all radii and is 20 mm at impeller exit. Assuming a hydraulic efficiency of 0.82 and an overall efficiency of 0.72, determine
a. the volume flow rate;
b. the slip factor using Busemann's method;
c. the impeller vane inlet angle required for zero incidence angle;
d. the power required to drive the pump.
for some transformation having kinetics that obey the avrami equation the parameter n is known to have a value of 1.1.
Video V1 starts the process with "Introduction to rolling bearings". The video number is noted after the question. 1. List three different types of bearings and one of these specific bearing's properties. V1
if a rectangular box with water accelerates to the right that has the dimensions ofleft side height 40cmlength
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a vessel contains 2 litres of gas at a pressure of 300kpa and a temperature of 27c .3 litres of gas at the same
A 25-kg block of copper at at initial temperature of 150 C equilibrates with 0.79 kg of liquid water at an initial temperature of 20 C in an insulated tank. If the average specific heat of copper can be taken to be 0.395 kJ/kg.K, determine the final ..
A sphere 1 ft in diameter is moving horizontally at a depth of 12ft below a water surface where the water temp is 50 deg F. Vmax=1.5Vo, where Vo is the free stream velocity and occurs at the max sphere width. At what speed in still water will cavitat..
Determine the coefficients for the balanced chemical reaction at stoichiometric conditions for both petrol and E10 with air.
a single unit of product a requires 2.4 minutes of punch press time and 5.0 minutes of assembly time. the profit for
mr. jones plans to purchase a new 18000 automobile. he wants to borrow all the money for the car and repay it in equal
Evaluate the steady-state surface temperature. If the heater is activated from an initial temperature of 27°C, estimate the time required for the surface temperature to come within 10°C of the steady- state value.
for antoine equation in the formlog10vp a- btcwith vp in mm hg and t degree c the constants for n-pentane are a6.853
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