The relative velocity of two consecutive layers is $8 \ cm/s$. If the perpendicular distance between the layers is $0.1 \ cm$,then the velocity gradient will be ......... $s^{-1}$.

Explain velocity gradient and coefficient of viscosity and give their units.

Discuss the coefficient of viscosity in terms of stress and strain.

There is a $1\, mm$ thick layer of glycerine between a flat plate of area $100\, cm^2$ and a big plate. If the coefficient of viscosity of glycerine is $1.0\, kg/(m\cdot s)$,then the force required to move the plate with a velocity of $7\, cm/s$ is $.......\, N$.

In a laminar flow,the velocity of the liquid in contact with the walls of the tube is:

Define the coefficient of viscosity.