Why does a desert cooler cool better on a hot ,dry day?
Answers
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.
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Answer -
On a hot dry day, the temperature is high and the humidity is low. The rate of evaporation increases with increase in temperature and decrease in humidity.
A desert cooler functions on the principle of evaporation. The water takes heat from the hot desert cooler and evaporates. The evaporation of water cools the pads and the circulating water. As a result of the incoming air also gets cooled down.
meaning :
Humidity - Humidity is the water vapor contained in the air. In our atmosphere, water is ubiquitous (even in arid deserts, there is humidity). The air around us always contains a proportion of water in the form of vapor; this air is called "moist air". In meteorology, it is important to know the humidity content in the air: it tells us about the possibility of cloud formation and precipitation.