An air bubble of radius |
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a) |
23.2 units |
b) |
83.5 units |
c) |
334 units |
d) |
167 units |
An air bubble of radius |
|||||||
a) |
23.2 units |
b) |
83.5 units |
c) |
334 units |
d) |
167 units |
(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.