Capillary Action in Thin Tubes

Capillary action explains why liquid can rise or fall in a very thin tube compared with the liquid around it. A capillary is a narrow cylindrical tube, and the effect becomes noticeable when it is dipped into a liquid. The movement happens because two forces act in opposite directions.

Cohesive f...

Capillary action is the ability of a liquid to flow against gravity in narrow spaces.

It occurs due to the combination of two opposing forces: cohesive forces, which cause the liquid to minimize the surface area and form a round shape, and adhesive forces, which cause the liquid to cling to the surface.

Consider capillary tubes in ...