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

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

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