Capillarity

 

Capillarity

Capillarity is the rise or fall of liquid in narrow tube. A tube with a very hole (bore) is called capillary tube

Nb:

i)        When you dip a capillary tube in water, the water rise due to greater adhesive force

ii)       When you dip a capillary tube in mercury, the mercury falls due to greater cohesive force

iii)     The greater adhesive and cohesive the greater the capillarity action

Application of Capillarity

i)        The raising of oil in the wicks of lamps in the cotton threads

ii)       The absorption of water by a towel

iii)     Water rises in the soil because the soil is composed of fine particles

iv)     It facilitates the transport of water and nutrients from the roots

v)       Ink rises into the blotting paper through those fine pores