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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. \(v_{av}=\frac{\frac{iγ_w}{8ηπ}}{a}\) | |