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प्रश्न
Why are quilts filled with fluffy cotton?
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उत्तर
Quilts are filled with fluffy cotton. Air is trapped in the fine pores of cotton. Cotton and air are the insulators of heat. They check heat from our body to escape and thus keep us warm.
The newly made quilts are warmer than the old ones because in the old quilts, there is no air trapped in the cotton.
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संबंधित प्रश्न
Write true or false for a given statement.
Heat flows from a body at a high temperature to a body at a low temperature when they are kept in contact.
Write true or false for a given statement.
Telephone wires are kept tight between the two poles in summer.
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Gases expand _______ than the liquids.
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Describe one experiment to show that liquids expand on heating.
Why are chimneys provided over furnace in factories?
Why do we prefer to wear white or light coloured clothes in summer and black or dark coloured clothes in winter ?
Mention the factors affecting the flow of heat.
Explain the following effects of heat.
Expansion
