I dont know if there is a special place for fluids. so i'll post it here.....(adsbygoogle = window.adsbygoogle || []).push({});

When a tube of small radius is placed in a liquid, the liquid rises or falls in the tube, due to adhesive and cohesive forces. also the height of the liquid in the tube is given by

[tex] h = \frac { 2 T cos\theta}{\rho g R} [/tex].

where T is surface tension, [tex]\theta[/tex] is the angle of contact, [tex]\rho[/tex] is the density of the liquid, R is the radius of the capillary tube..

However, if a tube a insufficient length is taken, i.e l <= h then something happens. i am not sure what......but i think, the liquid does NOT spill over, i.e the full height of the liquid is not reached..... is it because there is no more adhesive forces to pull ther liquid further up the tube?? in such a case, does the angle of contact remain the same??

is it true????

please explain why, too.

thank you.

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# Homework Help: Capillarity physics problem

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