Two Bars, a and B, Each of Length 2

question 42

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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Definitions:

Proactive Interference

A phenomenon where old memories hinder the recall of newly formed memories.

Remembering

The process by which past experiences are recalled or retrieved from memory.

Prospective Memory

It represents the part of memory that deals with recalling planned activities or intentions at a predetermined time in the future.

Odor

A smell produced by one or more volatilized chemical compounds that are generally found in low concentrations.