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Describe three daily life instances where viscosity plays an important role.

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  • Lubricating oils are viscous liquids. Gradation of lubricating oils is done on the basis of viscosity. A good quality lubricating oil does not change its viscosity with increase or decrease in temperature
  • Increase blood viscosity than the normal value is taken as an indication of cardiovascular disease.
  • Glass panes of old buildings are found to become thicker with time near the bottom. This indicates that glass is not a solid but a supercooled viscous liquid.

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