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CBSE Class 7 Answered

<div>why a cotton garment cannot keep us as warm in winter as &nbsp;a woollen sweater does?</div>
Asked by annusharma_2005 | 27 May, 2016, 09:50: PM
Expert Answer
Cotton clothes are thin and do not have spaces in their fabrics through which air can be trapped to keep us warm. So cotton clothes do not prevent heat coming out of our body.Woolens create a barrier to this and allow the body heat to stay in closer to the skin.
Answered by Sivanand Patnaik | 28 May, 2016, 07:51: PM
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