Question 9 of 12beginner🔧 ApplyShort Answer2 marks

The seat of a two-wheeler parked on a sunny day has become very hot. How can you cool it down?

Correct Answer

To cool down a hot two-wheeler seat, sprinkle some water on the seat. The water will evaporate and cause a cooling effect.

The chapter explains on page 14 that 'Sprinkling water on the floor or the roof during summer to cool it, is another example' of the cooling effect caused by evaporation.

When water is sprinkled on the hot seat, it absorbs heat from the seat and evaporates. This evaporation process imparts a cooling effect, making the seat cooler.

Alternatively, one could cover the seat with a wet cloth, which would also cool it through evaporation. Parking in shade would prevent the seat from becoming too hot in the first place.

Exercise: Let us enhance our learning | Q: 10 | (Page Page 20)
For More Understanding

Explanation

The chapter discusses the cooling effect of evaporation on page 14: 'Water seeps through the surface of the earthen pot and evaporates, which imparts a cooling effect on the water.' It also mentions that 'Sprinkling water on the floor or the roof during summer to cool it, is another example.' This same principle can be applied to cool a hot two-wheeler seat—sprinkling water causes evaporation, which produces a cooling effect.

Solution Steps

  1. Sprinkle water on the hot two-wheeler seat

  2. Water evaporates and causes a cooling effect

  3. Water absorbs heat from the seat during evaporation

  4. Alternative method: cover the seat with a wet cloth

  5. Prevention: park the two-wheeler in shade

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