Why do we characterize the heat conduction ability of insulators in terms of their apparent thermal conductivity instead of their ordinary thermal conductivity?

What will be an ideal response?


Most ordinary insulations are obtained by mixing fibers, powders, or flakes of insulating materials with air. Heat transfer through such insulations is by conduction through the solid material, and conduction or convection through the air space as well as radiation. Such systems are characterized by apparent thermal conductivity instead of the ordinary thermal conductivity in order to incorporate these convection and radiation effects.

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A person weighing 180 pounds on earth would weigh 1/6 this weight, or 30 pounds, on the moon.

Answer the following statement true (T) or false (F)

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Documents is a general term that refers to all drawings and written information related to a project.

Answer the following statement true (T) or false (F)

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Technician A says shop ventilation is not needed when working on new vehicles because new-vehicle emissions are low. Technician B says the shop's ventilation system should be connected to the exhaust pipe if the engine is running. Who is correct?

A. A only B. B only C. Both A and B D. Neither A or B

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