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प्रश्न
Why does our palm feel cold when we put some acetone (or perfume) on it ?
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उत्तर
Our palm feels cool when we put acetone over it because acetone takes up the latent heat of vaporisation to change into vapour from our palm.
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संबंधित प्रश्न
A patient suffering from high fever is advised to put wet clot strips on his forehead. Why?
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How does the water kept in an earthen pot (matka) become cold during summer ?
Why are we able to sip hot tea or milk faster from a saucer rather than from a cup ?
Which of the following are also considered to be the states of matter ?
- Plasma
- Platelets
- BEC
- BHC
During summer days, water kept in an earthen pot (pitcher) becomes cool because of the phenomenon of :
Give a geographical reason:
Air becomes saturated.
Evaporation of water from lakes and river ______.
Comment on the following statements:
Evaporation produces cooling.
Evaporation is a fast process and occurs only at the surface of the liquid.
