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Q. A major-league pitcher can throw a baseball in excess of 41.9 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches the catcher who is 18 m away from the point of release?

Q. When two identical ions are separated by a distance of 5.6 x10-10 m, the electrostatic force each exerts on the other is 6.6 x10-9 N. How several electrons are missing from each ion?

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