what is Newtons law of viscosity
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it states that shear stress be adjacent fluid layers is proportional to velocity gradient be 2 layers.the ratio of shear stress to shear pressure is constant for a given temperature or pressure..
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,Newton's viscosity law's states that, the shear stress between adjacent fluid layers is proportional to the velocity gradients between the two layers. The ratio of shear stress to shear rate is a constant, for a given temperature and pressure, and is defined as the viscosity or coefficient of viscosity
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