David' mother gave tea to David' father in a cup.David'* father told David to cool the tea as it is hot.Then David kept hot tea under the fan. What aspect did he keep in mind to cool the tea ? Explain.
Kishore kept in mind the concept of 'Evaporation'.Evaporation causes cooling.To make evaporation faster Kishore kept hot tea under fan. It increases the rate of evaporation and takes less time to cool the tea.
