Answer the question of thermodynamics

1 - A 10 cm long steel bar is end-welded to a 20 cm long copper bar. The two bars are perfectly insulated on their sides. The cross section of the two bars is a square of side 2.0 cm. The free end of the steel bar is held at 100C and the free end of the copper bar is held at 0c. a) Calculate the temperature TJ at the junction between the two bars and b) the total rate of heat transfer. Dice: K steel = 1.1 x10 -2 kcal/s.m.C , K copper = 9.2 x10 -2 kcal/s.m.C

\fP(pa) P(10'N/m') 4 A B 3 L - C - - 0,2 V(m') 0,2 0,6 V(m') Fig.4 Fig.3