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A 75 kilogram skier grips a moving rope that is powered by an engine and is pulled at constant speed to the top of a 23 degree hill. The skier is pulled to a distance x = 220 meter along the incline and it takes 2.0 minute to reach the top of the hill. If the coefficient of kinetic friction between the skies and the snow is uk =0.10, obtain what is the horsepower of the engine required if 30 such skiers (max) are on the rope at one time?
A water tank open to the atmosphere at the top has two smallholes punched in its side, one above the other. How high does the water stand inthe tank
Three electrons are placed at the coners of a 45 degree triangle (triangle is a right triangle). The distance along the horizontal and the vertical corners are 10^-8. Discover the magnitude and direction.
Two point charges lie on the x-axis: 1.80uC at x=1.15m, Find the place(s) where the electric field is zero
A siren has a frequency of 899 Hz when it and an observer are both at rest. Is the observer moving toward or away from the siren
a tiny sphere of mass 7.90 microg and charge ?2.80 nc is initially at a distance of 1.74 microm from a fixed charge of
A 5kg steel ball is dropped onto a copper plate from a heightof 10m. If the ball leaves a dent 3.2mm deep, what is the average force exerted by the plate on the ball during impact
A skier of mass 112 kg travels down a frictionless ski trail. If the top of the trail is a height 220 m above the bottom, what is the work done by gravity on the skier
A 27.00 kg block is pushed up a frictionless inclined plane that makes an angle of ? = 23 o with the horizontal direction. What force is needed to move the block
A uniform chain of length L and mass M is lying on a smooth table and one-third of its length is hanging vertically down over the edge of the table. If g is acceleration due to gravity, the workrequired to pullthe hanging part on to the table is
How much time elapses between first splash and second splash
The position of an object connected to a spring varies with time according to the expression x = (5.7 cm) sin(6.8?t). Find the period of this motion
monochromatic light falls on two very narrow slits 0.050 mm apart. successive fringes on a screen 5.10 m away are 5.2
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