Find the dimensions of the result of the following equations, and predict the parameter

calculated in each of them.

a$.\sqrt[\phantom{2}]{\frac{4g({}_p-)D_p}{3C_D}}$

$g$ is acceleration due to gravity, ${}_p$ and $$ are densities of solid

particle and fluid, $D_p$ is the particle diameter, $C_D$ is the drag

coefficient $($dimensionless$).$