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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.
Solids expand the least and gases expand the most on being heated.
Write true or false for a given statement.
A mercury thermometer makes use of the property of the expansion of liquids on heating.
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In a thermometer, the commonly used liquid is _______
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Liquids expand _______ than the solids.
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Gases expand _______ than the liquids.
State one application of thermal expansion of liquids.
Name a liquid which is a good conductor of heat.
What are the land and sea breezes? Explain their formation.
What are the effects of heat?
Mention the factors affecting the flow of heat.
