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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?
In a large centrifuge used for training pilots and astronauts, asmall chamber is fixed at the end of a rigid arm that rotatesin a horizontal circle. A trainee riding in the chamber of acentrifuge rotating with a constant angular speed of 2.5 rad/s..
ne kilowatt-hour (kWh) is the amount of work or energygenerated when one kilowatt of power is supplied for a timeof one hour. find the numbner of joules of energy in one kilowatt-hour
Coherent light with wavelength 609 passes through two very narrow slits, and interference pattern is observed on a screen a distance of 3 from the slits.
A certain laser emits light in a narrow band of wavelengths entered at 509.3 nm and by a ''wavelength width'' (such as on the scale of figure 33-1) of 0.0104 nm. What is the corresponding ‘frequency width'' in hertz for the emission?
A disk, with a radius of 0.25 m, is to be rotated like a merry-go-round through 1000 rad, starting from rest, gaining angular speed at the constant rate ?1 through the first 500 rad and then losing angular speed at the constant rate -?1 until it i..
A rope applies a horizontal force of 193 N to pull a crate a distance of 1.89 m across the floor. What is the work done by the frictional force
n unmarked police car traveling a constant 95 km/h is passed by a speeder traveling 130 km/h. how much time passes before the police car overtake the speeder
The total consumption of electrical energy in the United States is about 1.00×1019 Joules per year. find the average rate of electrical energy consumption per person
A hunter aims directly at a target (on the same level) 101m away. If the bullet leaves the gun at a velocity of 203m/s, by how much will it miss the target.
A figure skater performs a triple axel. She rotates around her longitudinal axis three times while in the air. She is airborne for 0.8 s. Calculate her average angular speed during the jump
Does the fact that Maxwell's equations do not need to be modi?ed because of the special theory of relativity, whereas Newton's laws of motion do, mean that Maxwell's work is somehow greater or more signi?cant than Newton's? Explain.
A 7 grams bullet, when fired from a gun into a 0.80 kilogram block of wood held in a vise, penetrates the block to a depth of 7 centimeter. Find to what depth will the bullet penetrate the block in this case
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