Introductory Fluid Mechanics L14 p3 - Six Steps to Pi Parameters

[hokelly]

Thank you sir. You save my Fluid final exam! This is a very clear and nice explanation

[diegofung]

First of all, thank you for posting all these videos. They are very helpful!
In step 4, I should not include, for example, both an area (L^2) and a second moment of area (L^4) as repeating parameters. But, if this is the case, D has [L] and rho has [M/L^3]. Doesn't this contradict one of the conditions in step 4? thank you