what is capillarity??
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the tendency of a liquid in a capillary tube or absorbent material to rise or fall as a result of surface tension.
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Capillary rise or capillarity is a phenomenon in which liquid spontaneously rises or falls in a narrow space such as a thin tube or in the voids of a porous material. Surface tension is an important factor in the phenomenon of capillarity. ... It can be either concave or convex, depending on the liquid and the surface.
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