Chapter 29, Problem 9P

Write equations for the darkened nodes in the grid in Fig. P29.9. Note that all units are cgs. The coefficient of thermal conductivity for the plate is $0.75\text{ cal/}\left(\text{s}\cdot \text{cm}\cdot °\text{C}\right)$, the convection coefficient is $h_c=0.015\text{ cal/}\left({\text{cm}}^{\text{2}}\cdot \text{C}\cdot \text{s}\right)$ and the thickness of the plate is 0.5 cm.