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The figure shows the commonly observed decrease in diameter of a water stream as it falls from a tap. The tap has internal diameter `D_(0)` and is connected toa large tank of water. The surface of the water is at a height `b` above the end of the tap. By considering the dynamics of a thin "cylinder" of water in the steam answer the following: (ignore any reistance to the flow and any effects of surface tansion, given `rho_(w) =` density of water) The equation for the water speed `v` as a funcation of the distance `x` below the tap will be:A. `v = sqrt(2gb)`B. `v = [2g (b + x)]^(1//2)`C. `v = sqrt(2gx)`D. `v = [2g (b - x)]^(1//2)` |
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Answer» Correct Answer - B `v = sqrt(2gh) = sqrt(2g(b + x))`. |
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