This is the most established method used to determine surface tension, in this method, the surface tension presence of the liquid/gas interface is taking fluid in a thin tube, generally a capillary made up of glass, and this occurrence was used to determine the surface tension of the liquid. For this cause, a thin round capillary is deep in the liquid which is already tested. If the liquid molecules have strong interaction among the capillary walls, the capillary end is deep in the solution. The height reaching the liquid in a capillary is associated with the surface tension.
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