(Solved): A formula to estimate the volume rate of flow, Q, flowing over a dam of length, B, is given by the ...

A formula to estimate the volume rate of flow, $Q$, flowing over a dam of length, $B$, is given by the equation $Q=3.09{\mathrm{BH}}^{\frac{3}{2}}$ where $H$ is the depth of the water above the top of the dam (called the head). This formula gives $Q$ in ${\mathrm{ft}}^3/\mathrm{s}$ when $B$ and $H$ are in feet. Is the constant, 3.09, dimensionless? Would this equation be valid if units other than feet and seconds were used?