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An air bubble of radius  is rising up at a steady rate of  through a liquid of density  , the coefficient of viscosity neglecting the density of air, will be ( )

a)

23.2 units

b)

83.5 units

c)

334 units

d)

167 units


Question ID - 57334 | Toppr Answer

An air bubble of radius  is rising up at a steady rate of  through a liquid of density  , the coefficient of viscosity neglecting the density of air, will be ( )

a)

23.2 units

b)

83.5 units

c)

334 units

d)

167 units

1 Answer - 5876 Votes

3537

Answer Key : (d) -

(d)

Let a bubble of radius  and density  is rising up in a liquid whose density is  and coefficient of viscosity .

Then effective force acting downward

Viscous force acting upward

Since bubble is moving up with constant velocity , there is no acceleration in it, the net force acting on it must be zero.



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