The math must be right: Comment on "Dimensional analysis, falling   bodies, and the fine art of not solving differential equations" by C. F.   Bohren [Am. J. Phys. 72, 534-537 (2004)]
  We find it necessary to advise the interested and active instructor of Physics on the wrongness of some computations in the aforementioned article. Surprisingly, the Journal refuses to even publish an erratum on the paper, which naturally brings to mind the question of the number of published papers requiring corrections. 
Rojas Sergio
physics.gen-ph physics.class-ph