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A 90% efficient turbine operates between two reservoirs connected by a 200-m length of 40-cm-diameter cast iron pipe that transports 0.8 m3=s of 20-C water. Estimate the power output of the turbine if the elevation difference between the surfaces of the reservoirs is 40 m.
The background sound level at your plant is 84 dBA. If a compressor generates a sound level of 87.3 dBA, what will the combined sound level be when the compressor is on
A sled starts from rest at the top of a frictionless (ice-covered), semi-spherical hill. At what angle theta max does it 'fly off' the hill
A +2.00nC point charge is at the origin, and a second -5.00nC point charge is on the x -axis at x = 0.800m. Discover the magnitude of the electric field at x = 0.200m on the x -axis? Discover the direction of the electric field at x = 0.200m on the x..
A 15-kg iron ball is dropped onto a pavement from a height of 80m. Suppose half of the heat generated goes into warming the ball. What is the temperature increase of the ball in degree C
A continuous stream of water runs from the faucet into a kitchen sink, picking up speed as it falls. What is the diameter of the flow tube of water
The needle of a sewing machine moves up and down in the same hermonic motion its driving force comes from a rotating wheel that is powered by an electric motor. how do you imagine that theup-and-down needle comapres with the period of the rotating..
A man throws a stone vertically downward with an initial speed of 11.5 m/s from the roof of a building, 39.0 meter above the ground. Determine the speed of the stone at impact
A race car starts from rest and drives as fast as possible over the"L" shaped course on the board. X=120m, R=35m. the car canaccelerate at a 9.0 m/s^2 under any condition (speeding up, slowingdown or turning). how long will it take to run the cour..
A broken down space ship flies across a soccer field (regulation length=100m) at a speed 0.55c. How long does the pilot measure the field to be
Kenny throws a basketball which has an initial speed v0. When the ball gets to its mininum speed sometime before striking the ground, What was the initial angle of the ball
John and Mary are skating at an ice rink. John skates at a constant speed of 6.8 m/s, with respect to the ice surface, directly south. What are the magnitude and direction of Mary's velocity
Calculate the focal length of the concave mirror
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