General Aim of Determination of the Coefficient of Viscosity
To determine the coefficient of viscosity of a liquid.
Method of Determination of the Coefficient of Viscosity
Measurement of viscosity by stokes' method
Learning Objectives of Measurement of Viscosity by Stokes Law Experiment
Employ Stoke’s method to find the terminal velocity of an object in a viscous medium.
Enumerates the different factors that could alter the viscosity of a liquid.
Theory of Determination of the Coefficient of Viscosity
When a metallic ball is allowed to fall through a liquid, it will reach its terminal speed after moving a certain distance through the liquid, where its weight is balanced by the viscous (drag) Stoke’s force due to the viscosity of the fluid, and the buoyant force acting on it. Writing the equilibrium condition for these forces enables us to derive a formula that can be used to determine the viscosity coefficient of the liquid.
Determination of the Coefficient of Viscosity Principle of Work
Determination of the coefficient of viscosity experiment depends on measuring the fall - terminal speed of a metal sphere that falls in a glass jar filled with a viscous fluid, as a function of the sphere’ radius. Hence the viscosity coefficient of the liquid can be readily determined.
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