1.

The average velocity of the tube of area a is given by _________

A. \(v_{av}=\frac{iγ_w}{8ηπ}a \)
B. \(v_{av}=\frac{\frac{iγ_w}{8ηπ}}{a}\)
C. \(v_{av}=\frac{iγ_w}{2ηπ}a\)
D. \(v_{av}=\frac{\frac{iγ_w}{4ηπ}}{a}\)
Answer» B. \(v_{av}=\frac{\frac{iγ_w}{8ηπ}}{a}\)


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