Question

wall has two layers a and beach made of different material both have the same thickness the thermal conductivity for a is twice that of B under steady state the temperature difference across the whole world is 36 degree Celsius then the temperature difference across the liar is ​

Answer 1

Answer:

12 degrees Celsius

Explanation:

Since the thickness of the both walls are same then the temperature at the joint of two walls is given by 

θ=K1θ1+K2θ2K1+K2But given K1=2K2 soθ=2θ1+θ233θ=2θ1+θ2      ........(1)also given the tempereture difference b/w the two walls θ1−θ2=36∘C       ........(2)Adding eq (1) and (2) we get 3θ+36∘C =3θ1  orθ−θ1=12∘Cso the temperature difference b/w the layers of A is 12∘C.