Question

why does a desert cooler cool better on a hot dry day​

Answer 1

Answer:

On a hot dry day, the amount of water vapour present in air is less. Thus, water present inside the desert cooler evaporates more, thereby cooling the surroundings more. That is why a desert cooler cools better on a hot dry day.

Explanation:

When a liquid evaporates, the particles of the liquid absorb energy from the surroundings to compensate the loss of energy during evaporation. Since evaporation causes cooling, this makes the surroundings cool.

In a desert cooler, the water inside it is made to evaporate. This leads to absorption of energy from the surroundings, thereby cooling the surroundings. Evaporation depends on the amount of water vapour present in air (humidity). If the amount of water vapour present in air is less, then evaporation is more. On a hot dry day, the amount of water vapour present in air is less. Thus, water present inside the desert cooler evaporates more, thereby cooling the surroundings more. That is why a desert cooler cools better on a hot dry day.

Answer 2

Question :- Why does a desert cooler cool better on a hot dry day ??

Answer :- A desert cooler has a water - tank in the bottom and exhaust fan one face and straw males on other three faces . A pump is used to pour water on the mares . When exhaust fan is on , hot air enters through the straw - mates and evaporation of water takes place that takes heat from hot air and it becomes cool . In this way , a desert coolers cool better on a hot dry day .

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