Question 1

What is dynamic viscosity?

Accepted Answer

Dynamic viscosity measures a fluid's resistance to shear flow. Water at 20°C has a viscosity of about 1 mPa·s (1 cP).

Question 2

What is the difference between poise and pascal-second?

Accepted Answer

1 poise (P) = 0.1 Pa·s. The centipoise (cP) equals 1 mPa·s.

Question 3

What are typical viscosity values for common fluids?

Accepted Answer

Air: 0.018 mPa·s. Water (20 °C): 1 mPa·s. Olive oil: ~80 mPa·s. Honey: 2,000–10,000 mPa·s. Peanut butter: ~250,000 mPa·s. Glass: ~10¹⁵ mPa·s.

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