The Diagram Shows Four Slabs of Different Materials with Equal

question 19

Multiple Choice

The diagram shows four slabs of different materials with equal thickness, placed side by side. Heat flows from left to right and the steady-state temperatures of the interfaces are given. Rank the materials according to their thermal conductivities, smallest to largest.

• A) 1, 2, 3, 4
• B) 2, 1, 3, 4
• C) 3, 4, 1, 2
• D) 3, 4, 2, 1
• E) 4, 3, 2, 1

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Definitions:

Expired Air

The air that is exhaled out of the lungs, typically containing lower oxygen and higher carbon dioxide levels than inhaled air.

Inspired Air

Air that is inhaled into the lungs, containing oxygen which is essential for the respiratory process in living organisms.

Oxygen

A chemical element with symbol O and atomic number 8, essential for respiration in most living organisms and required for combustion.

Carbon Dioxide

A gas that is clear and does not have a smell, created when carbon and organic compounds burn and through the breathing process, and taken in by plants for photosynthesis.