A viscous fluid is flowing through a cylindrical tube. The velocity distribution of the fluid is best represented by the diagram
None of this
(c)
Write one of the practical use of viscosity.
In an experiment, a small steel ball falls through a Iiquid at a constant speed of $10\, cm/s$. If the steel ball is pulled upward with a force equal to twice its effective weight, how fast will it move upward ? ……… $cm/s$
Spherical balls of radius $ 'r'$ are falling in a viscous fluid of viscosity '$\eta$' with a velocity $ 'v'. $ The retarding viscous force acting on the spherical ball is
$1$ poiseille $=$ ………. poise
Write $\mathrm{SI}$ and $\mathrm{CGS}$ unit of coefficient of viscosity.
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