Conduction of Heat: an Architect Is Interested in Estimating the Heat

question 108

Multiple Choice

Conduction of heat: An architect is interested in estimating the heat loss (in kcal/s) through a sheet of insulating material as a function of the thickness of the sheet. Assuming fixed temperatures on the two faces of the sheet, which one of the graphs in the figure best represents the rate of heat transfer as a function of the thickness of the insulating sheet?

• A) A
• B) B
• C) C
• D) D
• E) E

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Definitions:

Unit Value

The worth assigned to a single unit of an item, used to calculate cost, quantity, or other statistical measures.

Fraction

A mathematical expression representing a part of a whole, displayed as a numerator over a denominator.

Percentage

A numerical value representing a part of 100, signaled by a fraction or ratio.

Subtract

To take away a number or amount from another, leaving a difference.