Explain coeffecient of viscosity , its units and give its dimensional formula.

Explanation

Coefficient of viscosity of a liquid may be defined as the tangential viscous force required to maintain a unit velocity gradient between its two parallel layers each of unit area.
Dimensional formula ` = [ML ^(-1) T ^(-1) ] , ` Unit ` - Nsm ^(-2) or kgm ^(-1) s ^(-1) `