Two Bars,A and B,each of Length 2

question 14

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.
-Which one of the following statements is true concerning the above situation?

• A)For a given time t,the amount of heat transferred through bar A is the same as that through B.
• B)For a given time t,the amount of heat transferred through bar A is smaller than that through B.
• C)For a given time t,the amount of heat transferred through bar A is less than that through B.
• D)The time for a quantity of heat Q to pass through bar A is less than that for B.
• E)Time is not a factor in determining the quantity of heat conducted through these bars.

Identify and explain externalities, particularly in the context of basic research.

Apply the concept of goods classification to specific examples involving national defense, road congestion, and innovative inventions.

Understand the economic principles surrounding the commercial value of resources and their impact on conservation.

Describe the four types of goods and differentiate between them.

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Definitions:

Screws

Fasteners with a threaded shaft designed to hold objects together or to position them.

Threaded

Describes the process or the characteristic of incorporating threads for parallel execution in programming or mechanical connections.

Metallic

Pertaining to metals, their properties, characteristics, or appearance.

Necessary Condition

A condition that must be present for an event or statement to be true or to occur.