(Solved): Two perpendicular walls have a common edge. Each wall is 120 by \( 240 \mathr ...

???????

Two perpendicular walls have a common edge. Each wall is 120 by \( 240 \mathrm{~cm} \), the \( 120 \mathrm{~cm} \) edge being common. Wall (1) is vertical and has an emissivity of \( 0.7 \) and a temperature of 923K. Wall (2) is horizontal and has an emissivity of \( 0.4 \) and a temperature of 703K. Determine the radiation configuration factor and the net heat transfer between the two walls.