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A skier starts from rest at the top of a hill. The skier coasts down the hill and up a second hill, as the drawing illustrates. The crest of the second hill is circular, with a radius of r = 34 m. Neglect friction and air resistance. What must be the height h of the first hill so that the skier just loses contact with the snow at the crest of the second hill?
tim and rick both can run at speed vr and walk at speed vw with vrgtvw . they set off together on a journey of
Photorefractive keratectomy (PRK) is a laser-based surgery process that corrects near- and farsightedness by removing part of the lens of the eye to change its curvature and hence focal length. What is the energy of a single photon
In fair weather, over flat ground, there may be a downward electric field of 155 N/C. (a) Assume that the Earth is a conducting sphere with charge on its surface.
Illustrate what is the magnitude of the apparent weight of a 78kg astronaut 5200km from the center of the Earth's moon in a space vehicle moving at constant velocity?
A ball of mass 0.240 grams and positive charge, q =39.3 microC, is suspended on a string of negligible mass in a uniform electric field. We observe that ball hangs at an angle of theta =15.0 o from the vertical. What is the magnitude of electric f..
A laser emits a narrow beam of light. The radius of the beam is 1.0 mm, and the power is 2.8 mW. What is the intensity of the laser beam
four protons are placed at the corners of a square of side length a 1.0 angstrom. the square is in the x y quadrant of
Electromagnetic wave 1 has a maximum electric field of 56V/m , and electromagnetic wave 2 has a maximum magnetic field of 2.0muT, Calculate the average intensity of the first wave
In a mall, a shopper rides up an escalator between floors. At the top of the escalator, the shopper turns right and walks 11.42 m to a store. At what angle is the escalator inclined above the horizontal
The shaft of a pump starts from rest and has an angular acceleration of 3.00 rad/s2 for 15.0 s. What is the angle through which the shaft has turned
What is the speed of the large cart after the impact.
A cube of edge length l = 3.80 cm is positioned as shown in Figure P30.35. A uniform magnetic field given by B = (5.50 i + 4.00 j + 3.00 k) T , Calculate the flux through the shaded face
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