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A ray of light travels through 3 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 degree angle of incidence. The index of refraction of material a is na = 1.20. The angles of refraction in materials b and c are, respectively, 43 degrees and 60.1 degrees. Find the indices of refraction in these two media.
Two compact sources of sound oscillate in phase with a frequency of 120 Hz where the speed of sound is 340 m/s. What is the amplitude of the resultant wave at that point
A rocket fires two engines simultaneously. One produces a thrust of 615 directly forward while the other gives a thrust of 474 at an angle 39.6 above the forward direction.
An explosive is fired from the ground at an angle of 53.1° and a speed of 30.0 m/s. What is the speed of the explosive at the maximum height
Suppose that a person pushes a box with a constant force of 100 N over a distance of 25 meters. What is the change in kinetic energy
An electric power station is producing 1.60 × 103 W of power that is to be sent to a small town located 11 km away, Find the power lost in heating the wires if the voltage is stepped up from 130 V to 1400 V
A block is pushed up a 20.0 (degrees) frictionless incline with an initial speed 12.0 m/s. How much time does it take to return to its starting position
you ar charged to work on reducing expenditures for a company.you think that the company can save considerable money on fuel costs by lowering the room temperature of the building for daily use, How much heat will be saved each morning
Suppose that on earth you can throw a ball vertically upward a distance of 1.02 m. how high could you throw a ball on Pluto
The potiential energy of a + 2 * 10^-6 C charge decreases from 0.06J to 0.02J, What is the change in electric potiental between these two points
Two skaters, a man and a woman, are standing on ice. Neglect any friction between the skate blades and the ice. Determine the acceleration (magnitude and direction) of the man
A flight controller determines that an airplane is 30.0mi south of him, Half an hour later the same plane is 30.0mi north west of him, What is the magnitude of its velocity during this time
A spaceship of mass 2.2×106kg is cruising at a speed of 5.4×106m/s when the antimatter reactor fails, blowing the ship into three pieces. What is the speed of the third piece
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