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The drawing shows a ray of light travelling through three materials whose surfaces are parallel to each other. The refracted rays (but not the reflected rays) are shown as the light passes through each material. A ray of light strikes the a-b interface at a 50.0o angle of incidence. The index of reflection of materials a is na = 1.20. The angles of refraction in materials b and c are respectively, 39.0o and 53.9o. Find the indices of refraction in these two media.
What actually causes a Cepheid to vary in apparent brightness?
If friction and air resistance can be neglected, determine her speed vB when she reaches the horizontal end of the ramp at B.
A lidar (laser radar) gun is an alternative to the standard radar gun that uses the Doppler effect to catch speeders. A lidar gun uses an infrared laser and emits a precisely timed series of pulses of infrared electromagnetic waves.
the intensity in wm2 of one sound is 6.04 times as great as the intensity of another sound. relative to the quieter
a hot air balloonist rising vertically with a constant velocity of magnitude 5.0 ms releases a sandbag at an instant
A ship sets out to sail to a point 148km due north. An unexpected storm blows the ship to a point 109km due east of its starting point.
A 30-kg child rides on a circus Ferris wheel that takes her around a vertical circular path with a radius of 20 m every 22 s. What is the magnitude of the resultant force on the child
1. A 2.2 uC point charge is on the x-axis at 4.6 m, and a 4.5 uC point charge is on the x-axis at 2.8 m. Find the magnitude of the net electric field at the point on the y-axis where y= 2.2 m. The value of Coulomb constant is 8.98755 * 109 N.m2/C2. ..
In a volcanic eruption, 2 km3 of mountain with a density of 1600 kg/m3 was lifted an average height of 513 m. How much energy in joules was released
How much greater is an angular momentum of the Earth orbiting about the sun than the moon orbiting about the Earth? (Set up a ratio of angular momenta using data on inside back cover. The period of the moon is about 27.3 days.)
A boy coasts down a hill on a sled, reaching a level surfaceat the bottom with a speed of 7.1 m/s. how far does the sledtravel on the level surface before coming to rest
Earth orbits once around the sun every 365.25 days at an average radius of 1.5e11 m. Earth's mass is 6e24 kg. What is the average force that the sun exerts on the earth
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