a 6.6- A 15cmx15cm circuit board dissipating 15W of power uniformly is cooled by air, which approaches the circuit board at 20C with a velocity of 5m/s. Disregarding any heat transfer from the back surface of the board, determine the surface temperature of the electronic components (a) at the leading edge and (b) at the end of the board. Assume the flow to be turbulent since the electronic components are expected to act as turbulators. Answers: 45.9C9, 47.0C