Advertisements
Advertisements
प्रश्न
What type of clothes should we wear in summer ? Why ?
उत्तर
In summer, we should wear cotton clothes or white clothes because cotton absorbs sweat easily and exposes it to the air for evaporation. Evaporation of this sweat keeps our body cool. In addition, white colour reflects sunlight, keeping the heat away from the body.
APPEARS IN
संबंधित प्रश्न
Why does our palm feel cold when we put some acetone or petrol or perfume on it?
What type of clothes should we wear in summer?
Why is cooling produced on evaporation of a liquid?
Explain with an example to demonstrates that when a liquid evaporates, it takes heat from its surroundings.
Would you cool a bucket of water more quickly by placing it on ice or by placing ice in it ? Give reasons for your answer.
If the back of your hand is moistened with alcohol, you will find that it rapidly becomes dry. Why is it that while it is drying, your hand feels cool ?
How does the water kept in an earthen pot (matka) become cold during summer ?
What is evaporation ? State the various factors which affect evaporation.
Why does evaporation cool a liquid ?
The rate of evaporation ______ with rising temperature.