Question

Give reason :
a) Water droplets appear on the outer surface of a tumbler containing ice cold water
b) People prefer to wear cotton clothes in summer
c) on a hot sunny day people sprinkle water on the roof or open ground​

Answer 1

a)Sometimes we see water droplets on the outer surface of the glass containing ice-cold water this is because the water vapour presents in air, on coming in contact with the cold glass of water, loses energy and gets converted to liquid state, which we see as water droplets.

b)We wear cotton clothes during summer as cotton absorbs sweat from the body, exposing to the atmosphere for easy evaporation. As we tend to sweat more during summer and cotton fabric absorbs sweat and help body to cool down.

c)on hot sunny day, we sprinkle water on roof or open ground because the water can absorb the heat and get converted into vapours. Since water absorb heat so temperature of surrounding fell down and we get cooling.

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Answer 2

B)because cotton is natural in nature so it helps our body to breath
C)to reduce the temperature of roof and open ground so they it also reduce the temperature of a house if u sprinkle it on a roof of the house