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Figure shows how the stream of water emerging from a faucet necks donw as it falls. The area changes from `A_(0)` to A through a fall of h. At what rate does the water flow from the tap ? A. `A_(0) sqrt((2ghA^(2))/(A_(0)^(2)-A^(2)))`B. `2A_(0) sqrt((ghA^(2))/(A_(0)^(2)-A^(2)))`C. `A_(0)sqrt((gh)/(2))`D. `2A sqrt((ghA_(0)^(2))/(A_(0)^(2)-A^(2)))` |
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Answer» Correct Answer - A As,`A_(0)v_(0)=Av implies v^(2)=v_(0)^(2)+2gh` `implies v_(0) =sqrt((2ghA^(2))/(A_(0)^(2)-A^(2))) " or" R=A_(0)v_(0)=A_(0)sqrt((2ghA^(2))/(A_(0)^(2)-A^(2)))` |
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