An ice box is built of wood of thickness 1.75 cm. The box has an inner lining of cork 2 cm thick. If the difference in temperature between the interior of the box and outside is 12°C, calculate the temperature of the interface between wood and cork. Thermal conductivity of wood and cork are respectively 0.25 and 0.05 in S.I. unit.

An ice box is built of wood of thickness 1.75 cm. The box has an inner

1.	An ice box is built of wood of thickness 1.75 cm. The box has an inner lining of cork 2 cm thick. If the difference in temperature between the interior of the box and outside is 12°C, calculate the temperature of the interface between wood and cork. Thermal conductivity of wood and cork are respectively 0.25 and 0.05 in S.I. unit.
Answer» Solution :`0.25 XX A xx (285 - theta) // 1.75 xx 10^(-2)= 0.05 xx A ( theta - 273)//2 xx 10^(-3) , theta = 283.21` K