Question

7) Shreya is choosing a coat to use in very cold weather. The coat
she chooses should be made of which of the following fibres?​

Answer 1

Answer:

wool is the fibre she need to use

Answer 2

Answer:

Shreya should choose coats of wool and silk fibers (Natural fibers).

Explanation:

1. Wool prevents the entry of outer coldness and escaping of inner body heat because of the low thermal conductivity. It has tiny pockets of air inside the fibers which circulate the heat and maintain warmth during the fluctuations in the body temperature. Different examples of wool types are pashmina, yak, angora, etc.
2. Silk is also a very good option for cold weather as it provides a hypo-allergic barrier to the body from cold. It is the best fit as a base layer and is frictionless. It is smooth and elastic and helps in moisture absorption.

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