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Question
The rate of change of velocity along the depth of layer is ___________
Options:
A .  \(\frac{∂v}{∂z}=\frac{1}{γ_w}\frac{∂^2 \overline{u}}{∂z^2}\)
B .  \(\frac{∂v}{∂z}=\frac{k}{γ_w}\frac{\overline{u}}{∂z^2} \)
C .  \(\frac{∂v}{∂z}=\frac{∂^2\overline{u}}{∂z^2}\)
D .  \(\frac{∂v}{∂z}=\frac{k}{γ_w}\frac{∂^2 \overline{u}}{∂z^2}\)
Answer: Option D
Answer: (d).\(\frac{∂v}{∂z}=\frac{k}{γ_w}\frac{∂^2 \overline{u}}{∂z^2}\)

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