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An extreme skier, starting from rest, coasts down a mountain slope that makes an angle of 25.0o with the horizontal. The coefficient of kinetic friction between her skis and the snow is 0.200. She coasts down a distance of 10.4 m before coming to the edge of a cliff. Without slowing down, she skis off the cliff and lands downhill at a point whose vertical distance is 3.50 m below the edge. How fast is she going just before she lands? (HINT: Use energy considerations.)
Charges of 4.0 mC and - 6.0mC are placed at two corners of an equilateral triangle with sides of 0.10 m. At the third corner, what is the electric field created by these two charges
The angular momentum of a flywheel having a rotational inertia of 0.200 kg m2 about its central axis decreases from 5.00 to 1.20 kg m2/s in 2.20 s. What is the average power of the flywheel
An Escort and a Camaro traveling at right angles collide and stick together. What was the speed of the Camaro
A sailor strikes the side of his ship just below the waterline. He hears the echo of the sound reflected from the ocean floor directly below 1.6 s later. How deep is the ocean at this point
A Hall probe uses the Hall effect to measure the size of magnetic fields - it does this by measuring the potential difference across the electric field created by the displacement of charge
A very long, hollow cylinder (radius 4.7cm) is formed by rolling up a thin sheet of copper, Use Ampère's law to find the magnetic field outside the cylinder at a distance 6.8cm from the axis
A sledge loaded with bricks has a total mass of 17.9 kg and is pulled at constant speed by a rope inclined at 20.3° above the horizontal. What is the mechanical energy lost due to friction
Light of wavelength 587.5 nm illuminates a slit of width 0.75 mm. Calculate the width of the central maximum
A hollow, conducting sphere with an outer radius of 0.253m and an inner radius of 0.190m has a uniform surface charge density of +6.64×10?6 C/m^2. What is the electric flux through a spherical surface just inside the inner surface of the sphere
A particle having a mass of 0.180 gcarries a charge of ?2.34×10^?8. What are the direction of the minimum magnetic field that will balance the earth's gravitational pull on the particle
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.55 104 m/s, and the radius of the orbit is 5.40 106 m. What is the orbital speed of the second satellite
A point source emits sound waves with a power output of 120 W. At what distance will the decibel reading be 140 dB, which is noise level of a loud indoor rock concert
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