Question

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

Answer 1

Answer: A desert cooler cools better on a hot dry daybecause 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 coolingeffect.

Answer 2

On a hot dry day humidity is less in air and humidity is inversely proportional to rate of evaporation i.e humidity will decrease than evaporation rate will increase and vice versa. That's why desert cooler cool better on hot dry day.