The Grashof number and the square of the Reynolds number are plotted as functions of the velocity of air as it passes over a flat plate. The yellow area represents the region where \( \mathrm{ Re }^{2} / \mathrm{ Gr } < 0.2 \) and free convection dominates heat transfer. The blue area represents the region where \( \mathrm{ Re }^{2} / \mathrm{ Gr } > 5 \) and forced convection dominates heat transfer. The dotted red line represents the velocity selected by the slider, and the Nusselt number \( \mathrm{ Nu } \) is displayed above the plot for that velocity. The plate diagram is a representation of the system. The plate temperature and the fluid temperature can be changed with sliders. The length of the plate can also be changed with sliders.