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A 200g hockey puck is launched up a metal ramp that is inclined at a 30° angle. The coefficients of static and kinetic friction between the puck and the ramp are Us= 0.40 and Uk = 0.30, and the puck's initial velocity at the base is 3.8m/s parallel to the sloping surface of the ramp. What speed does the puck have when it slides back down to its starting point?
Two small balls are given positive charges. When they are a distance of 15.6 apart, the repulsive force between them has a magnitude of 0.220. What is the charge on the second sphere
An electron moving along the x axis has a position given by x = 12 te-t m, where t is in seconds. How far is the electron from the origin when it momentarily stops
A 76.9 kg man steps out a window and falls (from rest) 1.09 m to a sidewalk. What is his speed just before his feet strike the pavement
a beam of light with red and blue components of wavelengths 670 nm and 425 nm respectively strikes a slab of fused
A reflecting telescope has a main mirror with fM = 570 mm. If an eyepiece with a magnification of 45 is used, what is the total magnification of the telescope
the uss enterprise accelerates from rest at 100000 ms2 for a time of four seconds. how far did the ship travel in that
A tennis player swings her 1000 g racket with a speed of 15.0m/s . She hits a 60 g tennis ball that was approaching her at a speed of 15.0m/s. compute the average force that the racket exerts on the ball
The speed of light in a certain piece of clear plastic is 1.87 108 m/s. A ray of light strikes the plastic at an angle of 17°. At what angle is the ray refracted
a photocell that detects the amount of light transmitted through the finger at each wavelength. Identify the frequency of each of these light sources. If 66% of the energy of the red source is absorbed in the blood, by what factor does the amplitu..
A very powerful vacuum cleaner has a hose 3.00 cm in diameter. With the end of the hose placed perpendicularly on the flat face of a brick, what is the weight of the heaviest brick
A cylindrical copper cable carries a current of 1100 A. There is a potential difference of 1.6 multiplied by 10-2 V between two points, What is the radius of the cable
Your spaceship lands on an unknown planet. To determine the characteristics of this planet, you drop a 1.30 kg wrench from 3.50 m above the ground, What is the mass of the planet
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