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l2 A close analysis of the water waves is made by placing small corks at points A to H in water and observing their movements as waves pass through. The wave shown above is moving to the right. At the exact moment shown in the picture, which of the corks shown: a) are stationary? b) are in phase? c) are moving vertically downward? /3 9
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a) stationary are B, D,H b)inphase A and F c)moving vertically down wardis A,E,]F P 20W 14) intensity at a distance ris-I ;r-

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