Two layers of cloth of equal thickness provide warmer covering than a single layer of cloth of double the thickness, because they :
behave like a thermos
have lesser thickness
allow heat from atmosphere to the body
enclose between them a layer of air
A
behave like a thermos
B
have lesser thickness
C
allow heat from atmosphere to the body
D
enclose between them a layer of air
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Solution
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Air is a bad conductor of heat, hence if layer of air is isolated between two layers of cloth, warmer covering will be provided than if only one layer of cloth, where only body is isolated from surrounding air by cloth.
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