How much time elapses between first and second splash

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Q. Heather and Jerry are standing on a bridge 45m above a river. Heather throws a rock straight down with a speed of 19m/s. Jerry, at exactly the same instant of time, throws a rock straight up with the same speed. Overlook air resistance. How much time elapses between the first splash and the second splash?

Reference no: EM1369098

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