The sunlight from the sun reaches to earth in

In an earthen pitcher, the water remains cold due to the process of

People prefer to wear cotton clothes in summer season. This is due to the fact that cotton clothes are

In the night of strong wind, dew is not formed because

Evaporation from the surface of a given liquid takes place more rapidly when

The amount of heat required to change from liquid state to gaseous state without rise in its temperature is called: