Two walls made of different materials of length .5m each and identical area are placed in contact with each other, where the first wall is exposed to the atmosphere.
If the atmosphere is 20°C and the temperature of the second wall (T2) is 75°C, what is the temperature of the first wall (T1)?
Thermal conductivity coefficient of the first wall (k1) = 150 W/(m*K). Convective heat transfer coefficient (h) = 1000 W/(m^2*K).