The time period T of a small drop of liquid (due to surface tension) depends on density p, radius r and surface tension S. The relation is:

Let time period T is  a function of surface tension s^a, density ${\rho }^b$and radius r^c

$$\begin{gathered} T=k{\left[M{T}^{-2}\right]}^a{\left[M{L}^{-3}\right]}^b{\left[L\right]}^c \\ {M}^0=M^{a+b} a=-b \\ {L}^{-3b+c}=L^0 c=3b \\ {T}^{-2a}=T^1 a=-\frac{1}{2}, b=\frac{1}{2}and c=\frac{3}{2} \end{gathered}$$