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In the figure, the fresh water behind a reservoir dam has depth D = 14.4 m. A horizontal pipe 4.18 cm in diameter passes through the dam at depth d = 6.40 m. A plug secures the pipe opening.
(a) Find the magnitude of the frictional force between plug and pipe wall.
(b) The plug is removed. What water volume exits the pipe in 3.45 h?
Calculate the force required to pull a copper ball of radius 3.00 cm upward through a fluid at the constant speed 6.00 cm/s
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A hard disk in your computer spins at 5400 rpm. if this disk turns through 12 revolutions before coming to a stop, find the disks angular acceleration
A penny of mass 3.10 g rests on a small 20.0-g block supported by a spinning disk
question1a 14 g rifle bullet travelling 200 ms buries itself in a 3.5 kg pendulum hanging on a 3.3 m extended string
A target glider, whose mass m2 is 320 g, is at rest on an air track, a distance d = 53 cm from the end of the track. A projectile glider, How much more time elapses before the gliders collide again
You have three light-bulbs in series. The first is 60W the next is 120W and the last is 240W. They are all at 120v. Which light-bulb has the highest resistance. I use the equation.P=I^2R and found the 240W to be the highest. This is wrong. Which ligh..
A loaded railroad car of mass 6000 kg is rolling to the right at 2.0 m/s when it collides and couples with an empty freight car of mass 3000 kg, What is the velocity of the pair after the collision
If there had been no explosion, the shell would have landed a distance from the mortar. Suppose that air resistance and the mass of the shell's explosive charge are negligible. Determine the distance from the mortar at which the larger piece of th..
An ideal gas is confined to a cylinder by a piston. The piston is slowly pushed so that the gas temperature remains at 20 degrees C. find the entropy change of the gas
A very fast-moving train car passes you, moving to the right at 0.50c. You measure its length to be 12m. How long does David measure the train car to be
You and a friend have been given the task of designing a display for the Physics building that will demonstrate the strength of the electric force, calculate the necessary amount of charge on the marble for a reasonable ramp angle of 15 degrees
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