Question

Apply Your Knowledge
1. Why are the freezing points of most of the substances same as their melting points?
2. Why do wet clothes dry more quickly on a sunny day than on a cold humid day?
3. Why is a patient suffering from high fever advised to put wet cloth strip on his forehead?​

Answer 1

Answer:

1. Dame transition of matter

2.Due to sunlight

3.To reduce the temperature of your head. Because there is chances of epilepsy when you have high temperature.

Answer 2

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1)The melting temperature of a solid is generally considered to be the same as the freezing point of the corresponding liquid; because a liquid may freeze in different crystal systems and because impurities lower the freezing point, however, the actual freezing point may not be the same as the melting point.

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2) The hotter the air, faster is the evaporation. So cloths dry faster on hot sunny . On a cold humid day, moisture is more in air and air is colder due to which rate of evaporation is less.

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3) When strips of wet cloth are put on the forehead of person having fever, the water in the cloth absorbs heat from hot forehead to get vaporise. It helps to decrease the extra heat in the body caused due to high fever consequently helps to reduce body fever.

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YOUR ALL THREE ANSWERS ARE SOLVED :)

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