What is capillarity? Give two practical illustrations of capillarity.
(N/A) Capillarity is the phenomenon of the rise or fall of a liquid in a capillary tube (a tube with a very fine bore) when it is dipped in the liquid. This effect is caused by the surface tension of the liquid and the adhesive and cohesive forces acting at the liquid-solid interface.
Two practical illustrations of capillarity are:
$1$. The rise of oil in the wick of a lamp: The oil rises through the fine spaces between the threads of the wick due to capillary action,allowing it to reach the flame.
$2$. Absorption of ink by a blotting paper: The blotting paper contains a large number of fine pores which act as capillary tubes,drawing the ink into the paper through capillary action.
Two practical illustrations of capillarity are:
$1$. The rise of oil in the wick of a lamp: The oil rises through the fine spaces between the threads of the wick due to capillary action,allowing it to reach the flame.
$2$. Absorption of ink by a blotting paper: The blotting paper contains a large number of fine pores which act as capillary tubes,drawing the ink into the paper through capillary action.
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