CBSE Class 11-science Answered
surface tension
Asked by sonali221994 | 21 Apr, 2010, 11:31: AM
Expert Answer
The cohesive forces i.e. attraction between liquid molecules are responsible for the phenomenon known as surface tension. The molecules at the surface do not have other like molecules on all sides of them and consequently they cohere more strongly to those directly associated with them on the surface. This forms a surface "film" which makes it more difficult to move an object through the surface than to move it when it is completely submersed.
It's defined as force per unit length drawn in free surface of the liquid.
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Answered by | 21 Apr, 2010, 11:47: AM
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