Question

why does a desert cooler cools better on a hot dry day

Answer 1

This is because on a hot dry day , the evaporation of water will be faster due to increase in temperature and lesser humidity .

Answer 2

a desert cooler cools better on a hot dry day 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 .