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प्रश्न
Explain why in hot summer days water remains cool in earthen pots.
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उत्तर
Water seeps out through the pores in the earthen pot and it evaporates. The latent heat required for evaporation is taken, from the water inside the~pot which gets cooled.
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संबंधित प्रश्न
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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.
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The scientists now say that there are actually five states of matter A, B, C, D and E. The state A has a fixed volume but no fixed shape. The state B can be compressed very easily by applying pressure and state C has a fixed shape as well as a fixed volume. The state D is a mixture of free electrons and ions whereas state E is named after an Indian scientist and a famous physicist.
- Name the physical states (i) A (ii) B (iii) C (iv) D, and (v) E
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Air becomes saturated.
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Evaporation produces cooling.
The rate of evaporation ______ with rising temperature.
