A fan forces air over a computer circuit board with surface area of $120c{m}^2$ to avoid overheating. The air temperature is $300$ K while

the circuit board surface temperature is $360$ K $.$

Using data from Table $2\mathrm{.}1($also shown in the hint$),$ determine the following.

The largest heat transfer rate, in W $,$ that might be encountered for this forced convection.

$Q_c^{}=$

W

The smallest heat transfer rate, in W$,$ that might be encountered for this forced convection.

$Q_c^{}=$

W