a$)$ A $15cm15cm$ circuit board dissipating $20W$ of power uniformly is cooled by air, which approaches

the circuit board at $20C$ with a velocity of $6\frac{m}{s}.$ Disregarding any heat transfer from the back surface

of the board, determine the surface temperature of the electronic components i$)$ at the leading edge and

ii$)$ at the end $($trailing edge$)$ of the board.

b$)$ For which case $(i$ or ii$)$ the surface temperature is high and why?

Note: As the electronic components are expected to act as turbulators consider the flow to be turbulent