The poise (P) is the CGS unit of dynamic viscosity, named after the French physicist Jean Léonard Marie Poiseuille. One poise equals 0.1 Pa·s or 100 centipoise. Water at 20°C has a viscosity of approximately 0.01 P (1 cP), while motor oil is around 1–3 P.
Pascal Second
The pascal second (Pa·s) is the SI unit of dynamic viscosity. It measures a fluid's resistance to deformation under shear stress. Water has a dynamic viscosity of about 1 mPa·s (1 centipoise) at 20°C, while honey is approximately 2–10 Pa·s.
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