Question

23. When air of density 1.3 kg/m flows across the top of the tube shown in the accompanying figure, water
rises in the tube to a height of 1.0 cm. What is the speed of the air ?
1.0 cm​

Answer 1

The speed of the air is V = 12.4 m/s

Explanation:

1 / 2ρair v2 = ρwghw

V = √ 2ρwghw / ρ (air)

V = √ 2 x 10^3 x 10 x 10^-2 / 1.3

V = 12.4 m/s

Thus the speed of the air is V = 12.4 m/s

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