![]() In cgs units the unit is called the centistoke. The kinematic viscosity is the dynamic viscosity divided by the density of the fluid. The unit centiPoise = 0.001 Pa s and is is sometimes written mPa s. These viscosities are at 20☌ except for the blood and blood plasma which are at body temperature, 37☌, and for steam which is at 100☌. The Poise is used in the table because of its more common usage. More commonly used is the dyne sec/cm 2 which is called Poise. Viscosity has the SI units Pascal seconds (Pa s) which is called the Poiseuille. Pure liquid water is 1,000 kg/m3 (62 lb/cu ft).Viscosity of Liquids and Gases Viscosity of Liquids and Gases Liquids The kinematic viscosity of air at 15 ☌ is 1.48 × 10-5 m2 /s or 14.8 cSt.Īt 101.325 kPa (abs) and 15 ☌ (59 ☏), air has a density of approximately 1.225 kg/m3 (0.0765 lb/cu ft), which is about 1⁄800 that of water, according to the International Standard Atmosphere (ISA). The density of water at 25 degrees Celsius is 997 kg/m3. At room temperature ( ~ 200C), its value is 998.2 kg/m3. The density of water is defined similarly to other substances. What is the density of liquid water at 25 degrees Celsius?
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