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प्रश्न
What type of clothes should we wear in summer?
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उत्तर
- We should wear cotton clothes in the summer. During summers, we sweat more, and cotton is a good absorber of water.
- Thus, it absorbs sweat from our body and exposes the liquid to the atmosphere, making evaporation faster.
- During this evaporation, particles on the liquid's surface gain energy from our body's surface, cooling the body.
संबंधित प्रश्न
What is evaporation?
State three factors which affect the rate of evaporation of a liquid.
Why is cooling produced on evaporation of a liquid?
Give two applications of evaporation.
Explain why in hot summer days water remains cool in earthen pots.
A patient suffering from high fever is advised to put wet clot strips on his forehead. Why?
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 ?
Why are we able to sip hot tea or milk faster from a saucer rather than from a cup ?
Look at Fig. 1.3 and suggest in which of the vessels A,B, C or D the rate of evaporation will be the highest? Explain.
