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Viscosity

Viscosity is a measure of the resistance of a fluid to deformation under shear stress.

It is commonly perceived as "thickness", or resistance to pouring.

Viscosity describes a fluid's internal resistance to flow and may be thought of as a measure of fluid friction.

Thus, water is "thin", having a low viscosity, while vegetable oil is "thick" having a high viscosity.

Note: This article excerpts material from the Wikipedia article "Viscosity", which is released under the GNU Free Documentation License.

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