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Question

Why Does A Desert Cooler Cool Better On A Hot Dry Day

Solution
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A desert cooler cools better on a hot dry day due to the principle of evaporation. The temperature is high on a hot dry day, and the low humidity in the air allows for more efficient evaporation, resulting in better cooling. The outer walls of the cooler are constantly sprinkled with water, which evaporates due to the hot dry weather, causing a cooling effect.

The process of evaporation involves the conversion of liquid water into water vapor, and this phase change requires energy. As the water evaporates from the surface of the cooler, it absorbs heat from the surrounding air, leading to a decrease in the air temperature. Therefore, on a hot dry day, the low humidity allows for increased evaporation, which in turn enhances the cooling effect of the desert cooler.

In summary, a desert cooler cools better on a hot dry day because the low humidity allows for more efficient evaporation, leading to a more significant decrease in air temperature and better cooling effect.

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