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At a coal-burning power plant a steam turbine is operated with a power output of 465 MW. The thermal efficiency of the power plant is 31.6%. (a) At what rate is heat discarded to the environment by this power plant? (b) At what rate must heat be supplied to the power plant by burning coal?
In order to determine a newly developed material's specific heat conduct, material scientists conduct an experiment. what is the specific heat of the unknown
A rifle is aimed horizontally at a target 1,699.92 m away. The bullet hits the target 2.18 inch below the aim point. determine the bullets time of flight
On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 2.60 times as far as he would have on earth, given the same initial velocities on both planets. The ball is launched at a speed of 43.0 m/s at an an..
A prescription for a corrective lens calls for +1.50D. The lensmaker grinds the lens from a "blank" with n = 1.56, What should be the radius of curvature of the other surface
question1a hotel elevator ascends 160 with a utmost speed of 4.9. its acceleration and deceleration both have a
A 66-g ice cube at 0°C is placed in 865 g of water at 26°C. What is the final temperature of the mixture
A string provides a horizontal force which acts on a 500 N rectangular block at top right-hand corner, find the tension in the string required to start to tip the block over
A truck is traveling at 11.4 m/s down a hill when the brakes on all four wheels lock. How far does the truck skid before coming to a stop
An object of mass 3.3 kg is projected into the air at a 55° angle. It hits the ground 3.4 s later. What is its change in momentum while it is in the air
Suppose that protons are fired towards the large flat side of a charged conducting plate. How long does it take for the particles to hit the plate
A metal bar, pivoted at one end, oscillates freely in the absence of a magnetic field. But, when it oscillates between the poles of a magnet, its oscillations are quickly damped. Why? (Such magnetic damping is used in a number of practical devices..
A pitched ball is hit by a batter at a 45°angle and just clears the outfield fence, 98 m away. find the velocity of the ball when it left the bat
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