What is viscosity of water?

The viscosity of water at a temperature of 20 degrees Celsius is approximately 0.01 poise or 10-3 Pa. s (Pascal seconds). Viscosity is a measure of the resistance of a fluid to deformation at a given rate.

How do you find the viscosity of poise?

1 poise = 100 centipoise = 1 g cm−1 s−1 = 0.1 Pa s. 1 centipoise = 1 mPa s. Kinematic viscosity has SI units of m2 s−1. The physical unit for kinematic viscosity is the stokes (St), named after George Stokes.

How is water viscosity measured?

Capillary Viscometers Measuring viscosity via a capillary tube is one of the oldest methods of determining the kinematic viscosity of a sample, requiring prior knowledge of the density and volume of the sample of interest. This fluid is passed through a vertical U-tube of known dimensions and very small diameter.

What is the absolute viscosity of water?

The viscosity of water at 20 oC is commonly used as a primary standard. As mentioned earlier, the SI unit of absolute viscosity is Poiseuille , which relates to the viscosity of water at 20 oC.

What is the viscosity of water at room temperature?

Water has a viscosity of 1 cP at room temperature and honey ranges from 2,000-10,000 cP.

What is the least viscous liquid?

The least viscous liquid is the Helium II phase, which is superfluid. It occurs when it is cooled to a temperatura equal or less than 2.173 K (approximately -271,0ºC or -455,8ºF). Its viscosity is much lower than the viscosity of the Helium I. The data: Helium I – at 3.0 K : 0,0033 mPa x s; 0,033 cP.

What is viscosity of water in SI units?

Viscosity of liquids is expressed in a variety of units: with the standard SI unit being the Pascal second or Poiseuille. That unit does not prove to be convenient for many uses, but note that the viscosity of water at 20°C is almost exactly 1 if expressed in centipoise or milli-Pascal seconds.