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Q. A tennis player hits a ball 2.0 above the ground. The ball leaves his racquet with a speed of 21.0 at an angle 5.5 above the horizontal. The horizontal distance to the net is 7.0 , and the net is 1.0 high. By how much does the ball clear the net?

Q. A silver medallion is sealed within a transparent block of plastic. An observer in air, viewing the medallion from directly above, sees the medallion at an apparent depth of 1.3 cm beneath the top surface of the block. How far below the top surface would the medallion appear if the observer (not wearing goggles) and the block were under water?

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