plzz answer do genius wale only in short sentence
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plzz answer do genius wale only in short sentence
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1.a desert cooler cools better on a hot dry day
Explanation:
because on a hot dry day temperature is high and humidity is less which helps in better evaporation. Due to the higher rate of evaporation it gives better cooling effect.
2.The water kept in an earthen pot becomes cool in summer because earthen pot has many small holes. Water seeps out through them and evaporates from the surface of the pot. The energy needed for evaporation is taken from the water kept in the earthen pot. As a result, water kept in earthen pot become cool.
3.When we put some acetone or petrol or perfume on our palm, it evaporates. During evaporation, particles of the liquid absorb energy from the surface of the palm to compensate for the loss of energy, making the surroundings cool. Hence, our palm feels cold when we put some acetone or petrol or perfume on it.
4. it is easier to sip hot tea or milk faster from a saucer rather than from a cup because of evaporation as 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.
5.we should wear cotton clothes in summer beacuse we sweat a lot in summers. Cotton is a good absorber of water. Thus, it absorbs sweat from our body and exposes the sweat to the atmosphere, making its evaporation faster.
hope it will help you
cotton type of cloth should we wear in summmer because it is good absorbtion of water