The heat flux (from outside to inside) across an insulating wall with thermal conductivity, K = 0.04 W/m.°K and thickness 0.16m is 10 W/m2. The temperature of the inside wall is – 5°C. The outside wall temperature is___________________?
Correct answer: C
Explanation
Heat flux (q) is calculated by q = K * (T_out - T_in) / L. Solving for T_out gives 35°C.