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प्रश्न
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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उत्तर
We can cool a bucket of water quicker when we keep ice inside the bucket because ice cubes absorb more and more heat from the liquid system in which it is present, cooling the liquid system quickly. But when we put water in ice, the ice comes in contact with the bucket and absorbs the latent heat from both the water and bucket. Therefore, the effectiveness of cooling is reduced.
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संबंधित प्रश्न
Water in a dish evaporates faster than in a bottle. Give reason.
Why is heat energy needed to melt a solid ? What is this heat energy called ?
Define the following terms Condensation
Why does all the water of the earth not get evaporated during hot summer days ?
How does the water kept in an earthen pot (matka) become cold during summer ?
How will you demonstrate that water vapour is present in air ?
During summer days, water kept in an earthen pot (pitcher) becomes cool because of the phenomenon of :
The evaporation of water increases under the following conditions :
Give a geographical reason:
Air becomes saturated.
How does the water kept in an earthen pot remain cool?
