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  4. The relative velocity of two parallel layers of water is 8 cm / sec. If the perpendicular distance between the layers is 0.1 cm. Then velocity gradient will be

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Q. The relative velocity of two parallel layers of water is $8 \,cm / sec$. If the perpendicular distance between the layers is $0.1\, cm$. Then velocity gradient will be

Mechanical Properties of Fluids

Solution:

$d v=8\, cm / s$ and $dx =0.1 \, cm$
Velocity gradient $=\frac{ dv }{ dx }=\frac{8}{0.1}=80 / s$