Liquid in a vertical tube (The height to which the column is lifted )

Description

If a tube is sufficiently narrow and the liquid adhesion to its walls is sufficiently strong, surface tension can draw liquid up the tube in a phenomenon known as capillary action. The height to which the column is lifted is related to the density of the liquid, the liquid-air surface tension, the radius of the capillary and the angle of contact. If contact angle is greater than 90°, as with mercury in a glass container, the liquid will be depressed rather than lifted.

Related formulas

Variables

hThe height to which the column is lifted (m)
γlThe liquid-air surface tension (N/m)
θThe angle of contact (degrees)
ρThe density of the liquid (kg/m3)
gStandard gravity
rThe radius of the capillary (m)