Question

Plz Answer These Questions ​

Answer 1

Explanation:

1. because if sprinkle water on the roof in summer so the water evaporate quickly and cool down the roof .

2.because area of saucer is more than cup then the steam evaporate higly

so the tea or milk cool down faster

Answer 2

Answer:

1) We sprinkle water on the roof or open ground in hot summers. This water requires latent heat of vaporisation to change from liquid state to vapor state. It evaporates or vaporises by taking the large amount of latent heat from the roof or ground and surrounding.

2)It is easier to sip hot tea or milk faster from a saucer rather than from a cup because of evaporation . ... And evaporation causes cooling. So if the surface area is more rate of evaporation is faster and so is the cooling rate. Hence we are able to sip hot tea or milk faster from a saucer rather than from a cup.

3)Evaporation is a surface phenomenon because it occurs in the surface. For example when we put wet clothes for drying we spread them out so that the surface area gets increased. When the surface area increases the water will get enough space to get into vapour stage and thus evaporation happens easily.

HOPE THIS WILL BE HELPFUL