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The thermal conductivity al Al is twice that of brass. Two rods (1 Al and the other brass) are joined together end to end in excellent thermal contact. The rods are of equal lengths and radii. The free end of the brass rod is maintained at 0 degrees C and the Al free end is heated to 200 degree C. If no heat escapes from the sides of the rods, what is the temperatur at the interface between the two metals.

This sounds somewhat like a difference equation problem and i think i must find the thermal conductivity of Al and brass which i think one is .11 and the other .84 or something, ill have to recheck it. My question is what formula do i use to solve for this?

Thanks!

Dx