Write two units of surface tension and give the dimensional formula of surface tension.

(N/A) Surface tension $(T)$ is defined as the force per unit length acting on the surface of a liquid. Mathematically,$T = F/L$.
$1$. Units of surface tension:
- In the $SI$ system,the unit is Newton per meter $(N/m)$.
- Another common unit is Joule per square meter $(J/m^2)$.
$2$. Dimensional formula:
- The dimension of force $(F)$ is $[M^1 L^1 T^{-2}]$.
- The dimension of length $(L)$ is $[L^1]$.
- Therefore,the dimensional formula for surface tension is $[M^1 L^1 T^{-2}] / [L^1] = [M^1 L^0 T^{-2}]$.