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Viscosity :-
The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress.[1] For liquids, it corresponds to the informal concept of "thickness"; for example, honey has a much higher viscosity than water. the viscosity of liquids and gases are affected by temperature but in opposite ways meaning that upon heating, the viscosity of a liquid decreases rapidly, whereas gases flow more sluggishly. There are numerous ways to measure viscosity. A more advanced design of measuring viscosity known as the Ostwald Viscometer. An Ostwald Viscometer consists of two reservoir bulbs and a capillary tube. The viscometer is filled with liquid until the liquid reaches the mark on the viscometer with the aid of a pipette to accurately measure out the volume of needed liquid.
This video explains how to determine the coefficient of viscosity of a given viscous liquid by measuring terminal velocity of a given spherical body.
