1. The problem statement, all variables and given/known data See the picture for the homework problem: http://i41.tinypic.com/2drk2x.png 2. Relevant equations I'm having trouble converting between the first equation and the second one. I understand that Nu_x=h_x*x/k Re = rho*v*x/visc Pr = c_p*visc/k But how the heck do I convert all that to the second equation? Thanks 3. The attempt at a solution As above, I combined the equations together but I don't know where the T (temperature) comes in, or how you can simplify an equation when you have a square root and a cube root.