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A skier starts from rest at the top of a frictionless incline of height 20.0 m, as shown in the figure. As the bottom of the incline, the skier encounters a horizontal surface where the coefficient of kinetic friction between skis and snow is 0.216. Find the horizontal distance the skier travels before coming to rest if the incline also has a coefficient of kinetic friction equal to 0.216. (The incline makes an angle ? = 20.0° with the horizontal.)
A 12.0-V battery produces 215mA when it's across a 42.0? load. What's the battery's internal resistance
A single 6.3 μF capacitor is connected across the terminals of a 60 Hz voltage source, what is the capacitive reactance of the capacitor
Two concentric hollow metal spheres have radii r1=1.50E-2 m and and r2=6.80E-2 m. At a point 9.80E-2 m from the center of the spheres, the electric field is directed outward and has a magnitude 2.08E+2 N/C. At a distance 5.80E-2 m from the center,..
A plate carries a charge of -2.0 microcoulombs while a rod carries a charge of 2.5 microcoulombs. How many electrons should be transferred from the plate to the rod, so that both objects have the equal charge.
A toroidal solenoid has 550 turns, cross-sectional area 7.00cm2 , and mean radius 4.90cm, Calcualte the coil's self-inductance
A tennis ball of mass 57 g is traveling in the + x direction with a speed of 38 m/s. What is the change in momentum of the ball during the hit
What is the magnitude of the vertical component of its velocity as it strikes the ground.
Two indentical spaceships are travelling in the same direction. an observer on earth measure the first to have a speed of 0.80c, determine the speed of second spaceship
A 42.0-kg child swings in a swing supported by two chains, each 3.05 m long. The tension in each chain at the lowest point is 345 N. Find the child's speed at the lowest point
an object and lens positioned to form a well-focused, inverted image on a viewing screen. What happens to the image on the screen
State the condition that is necessary for a charge to move in a wire. Relate the definition of electric current to the units of current. Explain the cause of resistance and how the resistance of a wire can be determined.
You want to use a lens with a focal length of 37.0cm to produce a real image of an object, with the image twice as long as the object itself. Where should the object be placed
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