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Q. A charge of -3 nC and a charge of -5.8 nC are separated by a distance of 50cm. Find the position at which a third charge of 7.5 nC can be placed so that net electrostatic force on it is zero.

Q. A major-league pitcher can throw a baseball in excess of 44.2m/s. If a ball is thrown horizontally at this speed, how much would it drop by the time it reaches the catcher who is 16.10 m away from the point of release?

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