The value of viscosity of a fluid represents a measure of how easily the given fluid can...

The value of viscosity of a fluid represents a measure of how easily the given fluid can flow. The higher the viscosity value is, the more resistance the fluid offers to flow. For example, it would require less energy to transport water in a pipe than it would to transport motor oil or glycerin. The viscosity of many fluids is governed by Newton’s law of viscosity where τ is

shear stress (N/m²), μ is viscosity, and d_u is change in flow speed (m/s) over a height d_y (m). What is the appropriate unit for viscosity?