Viscosity is the resistance of a fluid (liquid or gas) to a change in shape or movement of neighbouring portions relative to one another. Viscosity...

The reciprocal property of viscosity is called fluidity, a measure of the ease of flow.

The unit of viscosity is newton-second per square metre, which is usually expressed as pascal-second in SI units.

The viscosity of liquids decreases rapidly with an increase in temperature, and the viscosity of gases increases with an increase in temperature. T...