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A pump is located between two reaches of horizontal piping. The conditions upstream of the pump are D1 ¼ 75 mm and p1 ¼ 450 kPa, and downstream of the pump D2 ¼ 100 mm and p2 ¼ 900 kPa. For a discharge of Q ¼ 100 L=min and a loss across the pump of hL ¼ 7 m, what is the required input power of the pump if its efficiency is 78%?
assume the roller coaster (h1 = 37 m, h2 = 13 m, h3 = 30) passes point A with a speed of 3.10 m/s. If the average force of friction is equal to one third of its weight, with what speed will it reach point B? The distance traveled is 55.0 m.
A ball of mass 1.7 kilogram is hung from a spring which stretches a distance of 0.27 meter. Calculate whta is the spring constant of the spring
Two identical insulating balls are suspended by a seperate 0.25m threads that are attached to a common point on a ceiling. Each ball has a mass of 8.0 x 10E-4 Kg. At first the balls are uncharged and hang straight down.
a spherical shell of inner radius 2.0 cm and outer radius 6.0 cm is charged to 9 nc a point charge of -6 nc is placed
A charge of 4.18 µC is located at the origin. A charge of -7.75 µC is located 4.80 cm along the x axis, that is, at the point (4.80,0.00) cm. Find the electric potential 2.95 cm along the y axis, that is, at the point (0.00, 2.95) cm
A mass rests on top of the piston. The initial temperature of the system is 305 K and the pressure of the gas is held constant at 137 kPa. The temperature is now increased until the height of the piston rises from 23.4 cm to 27.0 cm. What is the f..
A particle has an acceleration of 6.39 for 0.28. At the end of this time the particle's velocity is 9.31 .What was the particle's initial velocity.
This demonstration is more complicated because it involves a vector. For a rotating wheel, the direction of the angular momentum, , is found by curving the fingers of your right hand in the direction of the rotation, your thumb then points along .
A copper wire of length 16 cm is in a magnetic field of 0.19 T. If it has a mass of 9.0 g, What is the minimum current through the wire that would cause a magnetic force equal to its weight
A right circular cylinder has radius of 1cm and contains Hg ( d= 13.596 kg/l), Determine length of mercury column and length of water column
A glass is half-full of water, with a layer of vegetable oil(n = 1.47) floating on top. A ray of light travelingdownward through the oil is incident on the water at an angle of70.3°. Determine the critical anglefor the oil-water interface.
You are standing 4.5m from a convex security mirror in a store. You estimate the height of your image to be half of your actual height. Estimate the radius of curvature of the mirror
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