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A centrifugal pump impeller is rotating at 1200 rpm in the direction shown in Fig. P12.14. The flow enters parallel to the axis of rotation and leaves at an angle of 30° to the radial direction. The absolute exit velocity, V2, is 90 ft/s.
(a) Draw the velocity triangle for the impeller exit flow.
(b) Estimate the torque necessary to turn the impeller if the fluid is water. What will the impeller rotation speed become if the shaft breaks?
long metallic rods of circular cross section are heat treated by passing an electric current through the rods to
Suggest three specialized software tools that might be developed to support a process improvement program in an organization.
Calculate the force P necessary to start the block C sliding upward, as shown. The coefficient of static friction for all contact surfaces is 0.25. Neglect the weights of blocks A and C.
Suppose you are working for a start-up company that is designing a very new and innovative product. Does the client–user–designer model still apply? Who is your client in this case? Since you don’t have any customers yet, who are the users and how ca..
A Pitot-static probe connected to a water manometer is used to measure the velocity of air. If the de?ection (thevertical distance between the ?uid levels in the two arms) is 7.3 cm, determine the air velocity. Take the density of air to be 1.25 k..
A machine has a first cost of $45 000 and operating and maintenance costs of SO.22 per unit produced. It will be sold for $4500 at the end of five years.
A storm with winds of 30 mph deposits 16 in. of snow having a specific weight of 5.0 lbf/ft3. A1/2 size scale model is to be used to investigate the effectiveness of a proposed snow fence. If the air density is the same for the model and the stor..
your friend a 75 kg mountain climber is suspended from a cliff by a rope. calculate the tension in the rope in newtons
during drilling of a deep oil well the drill pipe got rigidly stuck. it was necessary to determine the depth at which
Convince yourself that the sum of two TEM waves which have components in opposite directions can produce a TM wave. What are the additional conditions necessary for this to happen?
consider refrigerant r-134a flowing in a smooth horizontal 10-mm-inner-diameter tube of wall thickness 2 mm. the
Calculate the initial potential of the cell.
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