A more exact kinematic viscosity for water at 20.2 oC (68.4 oF) is 1.0038 mm 2/s (cSt). The specific gravity for water at 20.2 oC (68.4 oF) is almost one, and the kinematic viscosity for water at 20.2 oC (68.4 oF) is for practical purpose 1.0 mm 2/s (cStokes). Since the Stoke is a large unit it is often divided by 100 into the smaller unit centiStoke (cSt) - where Stoke comes from the CGS (Centimetre Gram Second) unit system. In the SI-system the theoretical unit of kinematic viscosity is m 2/s - or the commonly used Stoke (St)where Μ = absolute or dynamic viscosity (N s/m 2) Kinematic viscosity can be obtained by dividing the absolute viscosity of a fluid with the fluid mass density like Kinematic viscosity is the ratio of - absolute (or dynamic) viscosity to density - a quantity in which no force is involved.
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