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When air of density 1.3 kg/m3 flows across the top of the tube shown in the accompanying figure, water rises in the tube to a height of 1.0 cm. The speed of the air (in m/s) is ______

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answer is 12.40.

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Detailed Solution

12ρairv2=ρwghwv=2ρwghwρair=2×103×10×10−21.3=12.4m/s
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When air of density 1.3 kg/m3 flows across the top of the tube shown in the accompanying figure, water rises in the tube to a height of 1.0 cm. The speed of the air (in m/s) is ______