Answer :
Final answer:
Surface tension is the energy needed to increase a liquid's surface area, caused by cohesive forces between molecules. It allows objects denser than water to float.
Explanation:
Surface tension is the energy required to increase the surface area of a liquid due to cohesive forces between molecules at the surface. It creates a 'skin' on the surface of liquids like water and allows objects denser than water to float. For example, insects can walk on water due to this property.
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