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What is surface tension simple definition?

Surface tension could be defined as the property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of the water molecules.

What is surface tension in chemistry?

Surface tension is a fundamental property of the surface of liquid. Surface tension is responsible for the curvature of the surfaces of air and liquids. Surface tension is responsible for the ability of some solid objects to “float” on the surface of a liquid.

What is viscosity and its SI unit?

Informally, viscosity is the quantity that describes a fluid’s resistance to flow. Fluids resist the relative motion of immersed objects through them as well as to the motion of layers with differing velocities within them. The SI unit of viscosity is the pascal second [Pa s], which has no special name.

What is cP in terms of viscosity?

The poise (symbol P; /pɔɪz, pwɑːz/) is the unit of dynamic viscosity (absolute viscosity) in the centimetre–gram–second system of units. A centipoise is one hundredth of a poise, or one millipascal-second (mPa⋅s) in SI units (1 cP = 10−3 Pa⋅s = 1 mPa⋅s). The CGS symbol for the centipoise is cP.

What is Decapoise?

The SI (MKS) unit is the decapoise (also spelled dekapoise), though the SI unit the pascal second (Pa s), which is dimensionally correct, is also seen. If, for a transverse velocity gradient of 1 m s−1 per cm, the tangential force per unit area is 1 N m−2, the dynamic viscosity is one decapoise.

What is viscosity used for?

What is Viscosity. Viscosity is an important property of fluids which describes a liquids resistance to flow and is related to the internal friction within the fluid. The most common type of flow behavior is shear flow where layers of fluid move relative to each another in response to a shearing force.

What is viscosity of water?

Water has a viscosity of 0.0091 poise at 25 °C, or 1 centipoise at 20 °C. As a function of temperature T (K): (Pa·s) = A × 10B/(T−C)

What is Newton’s law of viscosity?

Newton’s viscosity law’s states that, the shear stress between adjacent fluid layers is proportional to the velocity gradients between the two layers. The ratio of shear stress to shear rate is a constant, for a given temperature and pressure, and is defined as the viscosity or coefficient of viscosity.

Who invented the concept of viscosity?

Jean Léonard Marie Poiseuille