solve and check these answers. Also explain what equations are important to know when solving fluid dynamuc problems like this.

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