Why a cotton garment cannot keep us warm in winter as a woolen sweater does ??
Answers
Answer:
Answer: Cotton clothes are thin and do not have space in which air can be trapped. Thus, cotton clothes do not prevent heat coming out of our body. Woollen clothes keep us warm during winter because wool is a poor conductor of heat and it has air trapped in between the fibres.
Why a cotton garment cannot keep us warm in winter as a woolen sweater does ??
Explanation:
Cotton is a very thin fiber and is obtained from the cotton plant. It is a major cash crop. Garments made of cotton are not too dense and are unable to hold and trap air which makes the loss of heat from our body easy.
Therefore cotton clothes are preferred in hot and humid areas to facilitate perspiration and cooling of the body.
Wool is a dense fiber obtained from the fleece of sheep. its density helps it to trap air molecules which causes an insulation effect and prevent heat loss from the body. This is why woolen sweaters are able to keep us warm much better than cotton clothes in winters