Question

How does the air trapped by the woollen fabric help?
A. Air is a good conductor of heat and allows warm air to come near the body.
B. Air is a bad conductor of heat and allows body heat to escape into the atmosphere.
C. Air is the bad conductor of heat and doesn’t allow body heat to escape into the atmosphere.
D. Air is a good conductor of heat and doesn’t allow the cool air to come near the body.

Answer 1

Hint: The above problem can be resolved by using the concept and fundamentals of selecting material for the clothing. The air does not allow the thermal energy transfer to occur through itself; therefore, to provide insulation, the woollen fabrics are used so that the heat energy could not escape to the atmosphere.

Complete step by step answer:
During the winter season, the people were often seeking interaction with some warmness inside their body. Moreover, it is generally seen that they use some woollen fabric clothes to keep themselves warm. From this, one can conclude that the woollen fabrics are helpful during the winter season. As the air is the bad conductor of thermal energy and the woollen fabrics tend to act as a layer of the insulator that restricts the escape of thermal energy or the heat. Hence, using the limitation to escape heat from the body into the atmosphere, thereby giving the body the necessary amount of heat required during the winter season.
Therefore, it is concluded that air being the bad conductor of heat and doesn't allow the body heat to escape into the atmosphere and option C is correct.

Note:To resolve the given problem, one must go through the element and materials that are the bad conductors of heat. There are two types of heat conductors; one is a good conductor of heat that allows the thermal energy or heat to pass through themselves, and the other being a bad conductor that possesses the limitations to do so.