Two bars,A and B,each of length 2.0 m and cross sectional area 1.0 m²,are placed end to end as shown in the figure.
The thermal conductivities of the bars are
k A = 439 J/(s × m × K)and k B = 887 J/(s × m × K),respectively.The left end of bar A is maintained at 373 K while the right end of B is maintained at 273 K.
-What is the temperature at the interface between A and B?
A)296 K
B)306 K
C)313 K
D)323 K
E)332 K

Question

Two bars,A and B,each of length 2.0 m and cross sectional area 1.0 m²,are placed end to end as shown in the figure.
 The thermal conductivities of the bars are
k A = 439 J/(s × m × K)and k B = 887 J/(s × m × K),respectively.The left end of bar A is maintained at 373 K while the right end of B is maintained at 273 K.
-What is the temperature at the interface between A and B?
A)296 K 
B)306 K 
C)313 K 
D)323 K 
E)332 K

Quizplus · Accepted Answer

The temperature at the interface between A and B is given as 306 K.

Two Bars,A and B,each of Length 2