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प्रश्न
Why do we prefer to wear white or light coloured clothes in summer and black or dark coloured clothes in winter ?
उत्तर
We prefer to wear white clothes in summer. The reason is that the white clothes reflects most of the sun’s heat and absorb very little of the sun’s heat, thus they keep our body cool.
We prefer to wear black and dark coloured clothes in winter. The reason is that the black or dark colour clothes absorb most of the sun’s heat and keep our body warm
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संबंधित प्रश्न
Write true or false for a given statement.
Telephone wires are kept tight between the two poles in summer.
Fill in the blank
_________ determines the degree of hotness or coldness of a body.
Fill in the blank
On heating a body, its temperature _______.
Fill in the blank
Black and dull surfaces are ______ of heat.
Name the instrument used to measure the temperature of a body.
State one application of thermal expansion of liquids.
Name a solid which is a good conductor of heat.
Select good and bad conductors of heat from the following:
copper, mercury, wood, iron, air, saw-dust, cardboard, silver, plastic, wool.
Why do we use cooking utensils made up of copper.
Why is a ventilator provided in a room?
