Surface tension is a property exhibited by the surface of
liquids. It arises due to the cohesive forces between molecules. When molecules of
liquids are not totally surrounded by other molecules of the liquid itself they tend to
get attracted to molecules of other materials around them. Surface tension is defined in
units of force per unit length or N/m.
Surface tension is
what attracts molecules of liquids to form drops, it allows light objects to float on
the surface of liquids, and insects to walk on water, it creates a layer of separation
between substances that are not similar like oil and water.
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