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Water in a river 20 m deep is flowing at...

Water in a river 20 m deep is flowing at a speed of 10 `ms^-1`. The shearing stress between the horizontal layers of water in the river in `Nm^-2` is (Coefficient of viscosity of water = `10^-3` SI units)

A

`1xx10^-2`

B

`0.5xx10^-2`

C

`1xx10^-3`

D

`0.5xx10^-3`

Text Solution

Verified by Experts

The correct Answer is:
D
Shear stress,`tau = eta ((dv)/(dx)) = 10^(-3) (10/20) = 0.5xx10^(-3)N//m^(2)`
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