Advertisements
Advertisements
Question
Why does a desert cooler cool better on a hot dry day?
Answer in Brief
Advertisements
Solution
- When a liquid evaporates, its particles absorb energy from the surroundings to compensate for the loss of energy during evaporation. This makes the surroundings cool.
- In a desert cooler, the water inside evaporates. This absorbs energy from the surroundings, thereby cooling them.
- Again, we know that evaporation depends on the amount of water vapour present in the air (humidity). If the amount of water vapour present in the air is less, then evaporation is more. On a hot, dry day, the amount of water vapour present in the air is less.
- Thus, water present inside the desert cooler evaporates more, thereby cooling the surroundings more. That is why a desert cooler cools better on a hot dry day.
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
How does water kept in an earthen pot (matka) become cool during summer?
Wet clothes dry more quickly on a warm dry day than on a cold humid day. Explain.
Explain why in hot summer days water remains cool in earthen pots.
Why is heat energy needed to melt a solid ? What is this heat energy called ?
Define the following terms Condensation
How does the water kept in an earthen pot (matka) become cold during summer ?
What type of clothes should we wear in summer ? Why ?
The amount of vapour in 1 cu.m. of air shows the ______.
When lemon juice is mixed with soda water, they produce brisk effervescence.
The process of evaporation is not a good technic to separate salt from seawater give a reason.
