Question

what is the significance of determination of viscosity

Answer 1

Answer : Viscosity is the measure of a substance's resistance to motion under an applied force. The result is typically expressed in centipoise (cP), which is the equivalent of 1 mPa s (millipascal second). Shear stress is the force per unit area required to move one layer of fluid in relation to another. 

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Answer 2

The significance of the determination of viscosity is
the state of being thick, sticky, and semi-fluid in consistency, due to internal friction.
a quantity expressing the magnitude of internal friction in a fluid, as measured by the force per unit area resisting uniform flow
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