What is Viscosity?
Viscosity is the mechanical friction between molecules in motion, and the resistance to deformation because of mutual attraction of the molecules (in other words, resistance to flow).
There are two types of viscosity.
1. Dynamic viscosity, also known as absolute viscosity, is the tangential force per unit area required to move one horizontal plane with respect to another horizontal plane at a unit velocity when maintained a unit distance apart by the fluid.
2. Kinematic viscosity, it is the ratio of absolute/dynamic viscosity to density.
