Question

Give reason why .(a) Ice floats on water? (b) Water vapours cause more severe burns than boiling water? (c) Desert cooler cools better on hot dry day?​

Answer 1

A) Ice is actually about 9% less dense than water. Since the water is heavier, it displaces the lighter ice , causing the ice to float to the top .

B) Steam produces more severe burns than boiling water even though both are at 100° C because steam contains more heat , in the form of latent heat , than boiling water .

C) On a hot dry day , the amount of water vapour present in air is less . Thus , water present inside the desert cooler evaporates more , there by cooling the surroundings more .