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प्रश्न
How does the water kept in an earthen pot (matka) become cold during summer ?
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उत्तर
An earthen pot has a large number of extremely small pores on its wall. Some of the water, continuously keeps seeping through these pores. This water evaporates continuously and absorbs its latent heat, required for vaporization from the earthen pot and the remaining water in the pot. In this way, the remaining water loses heat and gets cooled.
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संबंधित प्रश्न
How does water kept in an earthen pot (matka) become cool during summer?
State three factors which affect the rate of evaporation of a liquid.
Why is cooling produced on evaporation of a liquid?
Why are we able to sip hot tea or milk faster from a saucer rather than from a cup ?
Why does our palm feel cold when we put some acetone (or perfume) on it ?
How will you demonstrate that water vapour is present in air ?
Which of the following are also considered to be the states of matter ?
- Plasma
- Platelets
- BEC
- BHC
How is humidity measured?
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.
Comment on the following statements:
Evaporation produces cooling.
