A large vertical plate is maintained at a surface temperature of 140oF and exposed to air at

Question:

A large vertical plate is maintained at a surface temperature of 140oF and exposed to air at 1 atm and 70oF. Estimate the vertical position on the plate where the boundary layer becomes turbulent. What is the average q/A for the portion of the plate preceding this location? What is the maximum velocity in the boundary layer at this location?