Common ways to measure surface tension and capillarity are:

1. Wilhelmy Plate Method:

   • This method checks the force on a plate that is dipped into a liquid.
   • Surface tension ($\gamma$) is found using the formula $\gamma = \frac{F}{L}$. Here, $F$ is the force, and $L$ is the edge length of the plate.

2. Du Noüy Ring Method:

   • In this method, a ring is pulled up from the surface of a liquid.
   • The strongest force needed to lift the ring tells us about the surface tension.

3. Capillary Rise Method:

   • This method measures how high a liquid goes up inside a tube.
   • The height ($h$) relates to surface tension with the formula $h = \frac{2\gamma \cos(\theta)}{\rho g r}$. In this formula, $\theta$ is the angle where the liquid touches the tube, $\rho$ is the liquid's density, $g$ is the force of gravity, and $r$ is the tube's radius.