1. Consider atmospheric air at 25°C and a velocity of 25 m/s flowing over both surfaces of a 1-m-long flat plate that is maintained at 125°C. Determine the rate of heat transfer per unit width from the plate for values of the critical Reynolds number corresponding to   105, 5 X 105, and 106.

2. Consider laminar, parallel flow past an isothermal flat plate of length L, providing an average heat transfer coefficient of hL. If the plate is divided into N smaller plates, each of length LN = L/N, determine an expres- sion for the ratio of the heat transfer coefficient aver- aged over the N plates to the heat transfer coefficient averaged over the single plate, hL,N /hL,1.