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The performance characteristics of a certain centrifugal pump are determined from an experimental setup similar to that shown in Fig. 12.10. When the flowrate of a liquid (SG = 0.9) through the pump is 120 gpm, the pressure gage at
(1) indicates a vacuum of 95 mm of mercury and the pressure gage at
(2) indicates a pressure of 80 kPa. The diameter of the pipe at the inlet is 110 mm and at the exit it is 55 mm. If z2 - z1 = 0.5 m, what is the actual head rise across the pump? Explain how you would estimate the pump motor power requirement.
A bullet of mass m = 25 g is fired into a wooden block of mass M = 4.5 kg. The block is attached to a string of length 1.5 m. The bullet is embedded in the block, causing block to then swing.
1) The intensity level of sound 200 m from a loud speaker at a heavy metal concert is 100 dB. At what distance from the speaker will the sound intensity level will be a tolerable 80 dB? Assume that thespeaker produce spherical sound wave.
An ideal spring with a stiffness of 379N/m is attached to a wall, and its other end is attached to a block that has a mass of 16-kg. The spring/block system is then stretched away from the spring's relaxed position until 59J of mechanical potentia..
In the picture mass 2 is initially at rest and attached to a spring of constant k. (The spring is fixed to the wall). Mass 1 travels at speed v and collides with mass 2 and the two stick together. ( There is no friction). Find an expression for the m..
A ball is dropped from a height of 1.50m and rebounds to aheight of 1.20m. Approxiamtely how many rebounds will the ball make before losing 90% of its energy
At 12 volt battery is connected in parallel with a 100,200,and 500 resistors. How much current flows through each resistors
A car and driver have a combined mass of 100 kg. What is the force of the hill on the car as it passes over the top
A crate of mass 14.0 kg is pulled up a rough incline with an initial speed of 1.50 m/s. How much mechanical energy is lost due to friction
q1. a standardized biological microscope has an 8.0--focal-length objective. what focal-length eyepiece should be used
two point charges attract each other with an electric force of magnitude f. if one charge is reduced to one-third its
Determine the energy needed to accelerate a spaceship with a mass m = 25 × 103 kilogram to a speed of 0.40c. Compare this number with the approximate annual energy usage of Earth, 1021 Joule
Ricardo and Jane are standing under a tree in the middle of a pasture. An argument ensues, and they walk away in different directions. Ricardo walks 24.0 in a direction 60.0 west of north. Jane walks 12.0 in a direction 20.0 south of west. They then ..
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