6.28 Experiment have shown that, for airflow at T=35 and V=100, the rate of heat transfer from a turbine blade of characteristic length L=0.15 and surface temperature T=300 is q=1500. What would be the heat transfer rate from a second turbine blade of characteristic length L=0.3 operating at T=400 in airflow of T=35 and V= 50? The surface area of the blade may be assumed to be directly proportional to its characteristic length .