Advertisements
Advertisements
प्रश्न
A patient suffering from high fever is advised to put wet clot strips on his forehead. Why?
Advertisements
उत्तर
Water in wet strips evaporates taking latent heat required for evaporation from the forehead. The temperature of the forehead (body of the patient) falls and he feels relieved.
APPEARS IN
संबंधित प्रश्न
A liquid can change into vapour state at all temperatures.
Why is cooling produced on evaporation of a liquid?
Explain with an example to demonstrates that when a liquid evaporates, it takes heat from its surroundings.
Why is heat energy needed to melt a solid ? What is this heat energy called ?
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.
Why does all the water of the earth not get evaporated during hot summer days ?
The evaporation of water increases under the following conditions :
How does the water kept in an earthen pot remain cool?
Evaporation is a fast process and occurs only at the surface of the liquid.
The rate of evaporation is more when the surface area is greater.
