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Q. A major league pitcher can throw a baseball in excess of 42.9 m/s. If a ball is thrown horizontally at this speed, how much will it drop by time it reaches the catcher who is 18 m away from the point of release?

Q. A proton orbits a long charged wire, making 2 times 10^ {6} revolutions per second. The radius of the orbit is 1.40 cm.

What is wire's linear charge density?

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Category:- Physics
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