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Question: Dimensional analysis is useful in the design of centrifugal pumps. The pressure rise across a pump (proportional to the head developed by the pump) is affected by the fluid density, p, the angular velocity, o, the impeller diameter, D, the volumetric flow rate, Q, and the fluid viscosity, µ. Find the pertinent dimensionless groups, choosing them so the Δp, Q, and µ each appear in one group only. Find similar expressions replacing the pressure rise fust by the power input to the pump, and then by the efficiency of the pump.
Determine the speed of M2 at a time 1.85 s after the system is free from rest.
A car starts at a position of x=2km and has a speed of 1 mph. After 56 s thecar has a speed of 44 mph. Determine the magnitude of the car's average acceleration during this time.
the space shuttle takes off from cape canaveral in florida and orbits earth 17 times before landing back at cape
An air bubble ascends from the bottom of a lake 15 m deep. The temperature at the bottom of the lake is 4oC, what would be the volume of the bubble at the top of the lake?
A block is connected among two springs on a frictionless, horizontally level track. The other end of each spring is respectively anchored to a vertical pin set at opposite ends of the track.
A 35-kg block is supported by the spring arrangement shown. The block is moved vertically downward from its equilibrium position and released.
State the condition that is necessary for a charge to move in a wire. Relate the definition of electric current to the units of current. Explain the cause of resistance and how the resistance of a wire can be determined.
Imagine that I hang a heavy copper ring on a string attached to the ceiling and throw a strong magnet through the ring with the North Pole leading and the South Pole trailing? Draw a picture of the situation. Define the coordinate system you can us..
Monochromatic light of wavelength 675 nm falls on a slit. If the angle among the first bright fringes on either side of the central maximum is 21.5°, estimate the slit width.
A tiny ball (mass = 0.013 kg) carries a charge of -21C. What is the electric field magnitude that would cause the ball to float above the ground
A rocket cruising past earth at 0.800c shoots a bullet out the back door, opposite the rocket's motion, at 0.900c relative to the rocket. What is the bullet's speed relative to the earth
a skydriver weighs 131 lb. when the skydriver reahces terminal speed, how much air drag does the skydriver is experience
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