1. The problem statement, all variables and given/known data Just a quick question. This is fairly terrible that I'm blanking on something as fundamental as this. It's to do with units and dimensions. So, Area, for example, = L * L = L^2. If I have a quantity, R, for example and let's say it's units are L. If I use R in some arbitrary equation and square it does it then become the |R|^2 L or |R|^2 L^2 (where |R| is the scalar component of R)??? 2. Relevant equations The following is what got me confused about this. u(the average velocity) = 14/R2 * umax(The max velocity) * (R(1/4) - R(1/15). 3. The attempt at a solution So, the units don't check out in the above equation for velocity, do they?