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प्रश्न
Why are quilts filled with fluffy cotton?
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.
Name the instrument used to measure the temperature of a body.
Describe one experiment to show that liquids expand on heating.
State which expands more, when heated to the same temperature : solid, liquid or gas ?
Name a solid which is a good conductor of heat.
Explain why the water pipes are covered with cotton during very cold weather.
What are the effects of heat?
When we heat them the force of attraction between the molecules decreases and the ice cubes become ______.
______ is greater for liquids than solids and it is maximum in gases.
Explain the following effects of heat.
Expansion
