A ray of light is directed down on to the surface of the water in a fish tank, making an angle of 30° with the surface. The light that is transmitted into the water makes an angle of 49° with the surface.
a) What is the angle of incidence at the air – water interface?
by What would be the angle of retlection for the partially reflected light?
c) What is the angle of refraction for the light transmitted into the water?
d) what is the angle of deviation for this transmitted light?
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Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

1point) a skydiver weighing 130 lb (including equipment) falls vertically downward from an altitude of 14,000 ft and opens the parachute after 20 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.85|v|0.85|v| when the parachute is closed and is of magnitude 17|v|17|v| when the parachute is open, where the velocity vv is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. find the speed of the skydiver when the parachute opens. speed is 150.6121788 ft/s find the skydiver's height when the parachute opens. height is 2338.98591 ft find the limiting velocity vlvl after the parachute opens. (think about whether this should be positive or negative.) vl=vl= 7.647 ft/s

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10