The speed of the water in a river is $V$ near the surface. If the coefficient of viscosity of water is $\eta$ and the depth of the river is $H$, then the shearing stress between the horizontal layers of water is

  • A
    $\eta H / V$
  • B
    $\eta V / H$
  • C
    $\frac{V}{\eta H}$
  • D
    $\eta V H$

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