Question

why does a desert cooler cool better on a hot dry day
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Answer 1

Answer:

A desert cooler cools better on a hot dry day because on a hot dry daytemperature is high and humidity is less which helps in better evaporation. Due to the higher rate of evaporation it gives better cooling effect.

Explanation:

Answer 2

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The cooling in a desert room cooler is caused by the evaporation of water. A desert cooler cools better on a hot and dry day because the higher temperature on a hot day increase the rate of evaporation of water, and dryness of air ( low humidity of air) also increase the rate of evaporation of water. And due to increase the rate of evaporation of water , a desert room cooler cools better on a hot and dry day