Question

Why does a desert cooler cool better on a hot dry day

Answer 1

Answer:

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

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Answer 2

The particles of liquid in desert cooler absorb energy from the surrounding to regain the energy lost during evaporation. In summer this is fast. Hence desert cooler cool better in a hot dry day.