### Formula

r

the radius of tube

gamma

the liquid-air surface tension

theta

the contact angle

h

the height of the liquid column

g

local gravitational field strength (force/unit mass)

rho

the density of liquid

r

the radius of tube

gamma

the liquid-air surface tension

theta

the contact angle

h

the height of the liquid column

g

local gravitational field strength (force/unit mass)

rho

the density of liquid

Capillary action, or capillarity, is the ability of a liquid to flow against gravity where liquid spontaneously rises in a narrow space such as a thin tube, or in porous materials such as paper or in some non-porous materials such as liquified carbon fibre.

gamma

theta

h

g

rho

r

Precision

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