Give reasons for the following:-
a) Our palm feels cold when we put some acetone or petrol or perfume on it.
b) We able to sip hot tea or milk faster from a saucer rather than a cup.
c) We wear cotton clothes in summer.
d) We see water droplets on the outer surface of a glass containing ice-cold
water.
e) People sprinkle water on the roof or open ground after a hot sunny day.
Answers
Answered by
1
Answer:
1) increase in surface area
2) I don't know
3) it doesn't absorb heat
4) evaporation& condensation takes place
5) it gives cool
Answered by
4
Answer:
when we put some acetone or petrol or perfume on our palm, it evaporates. During evaporation, particles of the liquid absorb energy from the surrounding or the surface of the palm to compensate for the loss of energy, making the surroundings cool.
(b) liquid has a larger surface area in a saucer than in a cup. Thus, it evaporates faster and cools faster in a saucer than in a cup.
(c) cotton is good absorber of water. Thus, it absorbs sweat from our body and exposes the liquid to the atmosphere, making evaporation faster.
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