Two Bars,A and B,each of Length 2

question 29

Multiple Choice

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 rate of heat transfer through this combination?

• A)3.7 × 10³ J/s
• B)6.4 × 10³ J/s
• C)8.8 × 10³ J/s
• D)1.5 × 10⁴ J/s
• E)2.2 × 10⁴ J/s

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