A slab consists of two parallel layers of iron and brass 10 cm and 10.9 cm thick and of thermal conductivities 500 "Wm"^(-1) "K"^(-1) and 109 "Wm"^(-1) "K"^(-1) respectively. The area of opposite faces are 2m^(2) each and are at temperatures 373 K and 273 K. Find heat conducted per second across the slab and also the temperature of the interface.

A slab consists of two parallel layers of iron and brass 10 cm and 10.

1.	A slab consists of two parallel layers of iron and brass 10 cm and 10.9 cm thick and of thermal conductivities 500 "Wm"^(-1) "K"^(-1) and 109 "Wm"^(-1) "K"^(-1) respectively. The area of opposite faces are 2m^(2) each and are at temperatures 373 K and 273 K. Find heat conducted per second across the slab and also the temperature of the interface.
Answer» Solution :`500 XX 2 (373 - theta) // 1.75 xx 10^(-2) = 0.05 xx A ( theta - 273) // 2 xx 10^(-3) , theta=356.33 K`