Your email address will not be published. 2. A graph is plotted between concentrations of various solutions on the x-axis and ŋsp/C on the y­ axis. Viscosity and Density (Metric SI Units) In the SI system of units the kilogram (kg) is the standard unit of mass, a cubic meter is the standard unit of volume and the second is the standard unit of time. In other words, viscosity describes a fluid’s resistance to flow. The compounds of normal chain length have usually greater viscosity values than branched-chain Similarly, the viscosities of Tran’s isomers are greater than cis-isomers. When we move towards the center of the tube, then the velocities of the successive layers go on increasing. units, the following equation is used. The viscosity of air and of some liquids is utilised for damping the moving parts of some instruments. The time of flow of the liquid through the capillary tube is noted. If the chain length of the molecule is shorter, the viscosity is less. s/cm ^ 2 or 0.890 cP. Nice explanation. Also, the viscosity of liquids decreases as the temperature increases, while for gases, it increases with the increase in temperature. A definite volume of liquid is put in bulb ‘B’ and then sucked in bulb ‘A’. If you wish to learn more physics concepts with the help of interactive video lessons, download BYJU’S – The Learning App. In physics, hydrodynamics of fluid dynamics explains the mechanism of fluid such as flow of liquids and gases. Some of the liquids are associated and so their viscosities Dunston in 1909, gave a useful relationship. The property of a fluid by virtue of which an internal frictional force acts between its different layers which opposes their relative motion is called viscosity. In order to decide, which type of flow is there, we should use the empirical equation called Reynold’s number. Viscosity Units: 3. We can verify the structure of the compound by comparing the theoretical and experimental Rheochors Table. Viscous forces are intermolecular forces acting between the molecules of different layers of liquid moving with different velocities. The strength of intermolecular forces can also be depicted from the Values of viscosity. Viscosity is measured in terms of a ratio of shearing stress to the velocity gradient in a fluid. For example, for random coiled molecules. Although all liquids have a certain value of viscosity, the for liquids is generally considered as high or low, keeping the viscosity of water as a benchmark. CGS Unit of Viscosity. The layer adjacent to the walls of the tube is stationary. Moreover, the diameter of the tube should be very small. 5. If a sphere is dropped into a fluid, the viscosity can be determined using the following formula: ... For a few applications, kinematic viscosity is more useful than absolute or dynamic viscosity. One can understand the content easily. 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