why murcury does not wet wood whereas water does?
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When liquid water is confined in a tube, its surface (meniscus) has a concave shape because water wets the surface and creeps up the side. Mercury does not wet glass - the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass.
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BECAUSE THE COHESIVE FORCE BETWEEN WATER MOLECULES AND WOOD IS GREATER THAN THE FORCE OF ADHESION BETWEEN WATER M MOLECULES.
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