Advertisements
Advertisements
प्रश्न
Why does a desert cooler cool better on a hot dry day?
संक्षेप में उत्तर
Advertisements
उत्तर
- 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
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
संबंधित प्रश्न
Why are we able to sip hot tea or milk faster from a saucer than a cup?
Water in a dish evaporates faster than in a bottle. Give reason.
Why is cooling produced on evaporation of a liquid?
Give two applications of evaporation.
Define the following terms Condensation
If the back of your hand is moistened with alcohol, you will find that it rapidly becomes dry. Why is it that while it is drying, your hand feels cool ?
Why does our palm feel cold when we put some acetone (or perfume) on it ?
Why is the air in a region dry?
Give a geographical reason:
Air becomes saturated.
How does the water kept in an earthen pot remain cool?
