Physics, asked by pratham851584, 9 months ago

A student observes that when a folded sweater is pressed down and released, it easily gets pressed and then, instantly bounces back in shape. The student concludes that thick woollen fibres can trap a lot of air within their strands. Which option explains how woollen sweaters protect us from cold weather?

a) Convection provided by the wool fibres and insulation by air

b) Insulation provided by the wool and conduction of body heat

c) Insulation provided by the wool fibres and air trapped in them

d) Convection of heat by the human body and reflection by wool ​

Answers

Answered by bhawika69
7
Option c
Because air traps the heat and wool dont let it to go
Answered by Anonymous
0

Woollen sweaters protect us from cold weather by c) Insulation provided by the wool fibres and air trapped in them.

  • Woollen fabrics essentially trap air between them, and air conducts heat poorly. As a result, the heat radiated from the body is contained by the air between the woollen textiles, which prevents the heat from being transferred to the environment.
  • Cotton clothes can't be worn during the winter season as they don't have spaces between them to trap air and keep the body warm. Hence, woollen sweaters protect us from cold weather.
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