SI unit of surface tension is

SI unit of surface tension is Newton per metre.

The CGS unit of surface tension is dyne per centimetre.

Surface tension is defined as the ratio between force and length.
Therefore, the dimensional formula of surface tension is M1L0T-2.

Applications of surface tension:

  • Soaps and detergents have less surface tension making them spread over larger areas and also in cleaning the dirt more effectively.
  • The surface tension of antiseptics such as Dettol are low making them spread faster.

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