Question

why do people sprinkle water on the open ground or roof after a hot summer day?​

Answer 1

Answer:

We sprinkle water on the  open ground in hot summers. This water requires latent heat of vaporization to change from liquid state to vapor state. It evaporates or vaporizes by taking the large amount of latent heat from the roof or ground and surrounding air. Hence, the ground becomes cool after losing its heat to water