a ray of monochromatic light having a frequency of 5.25 x 10^14 hertz is traveling from ethyl alcohol into zircon. the angle of incidence in ethyl alcohol is 39 degrees. a) determine the angle of refraction. b) some of the light is reflected so what is the angle of reflection? c) what is the speed of light in zircon? d) what is the wavelength of this light in zircon?

What is the length x of the side of the triangle below? (hint: use the cosine function)

The summit of chimborazo, in ecuador, which is at a distance of about 6,384 km from the earth’s center. the bottom of the mariana trench, in the western pacific ocean, which is nearly 6,370 km from the center of the earth. on the surface of earth on the equator line.

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s