Unit of Surface Tension

Surface tension is an interesting topic to study. It is mainly defined as the attractive force that is found mostly in liquids which pulls molecules in the surface together resulting in the minimizing of the surface area. In more technical terms, surface tension is the energy required to increase the surface area of a liquid by a unit of area. The surface tension is present due to the imbalance of inter-molecular attractive forces or the cohesive forces between molecules. This phenomenon mostly occurs with water, but it can happen with other liquids as well. Surface tension is represented by the symbol γ (alternatively σ or T) and is measured in force per unit length. However, here we will look at some of the units of surface tension.

SI Unit of Surface Tension

The SI unit of surface tension is newton per meter or N/m.

Other Common Surface Tension Units

The cgs unit of surface tension is dyne per centimetre. It can be represented as;

It can also be measured as surface energy using J/m2 or alternatively ergs per square centimetre.

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