## Convert the following temperature to the Celsius scale

[question] Question Convert the following temperature to the Celsius scale - (i) 293 K (ii) 470 K [/question] [solution] Solution (i) 293 - 273 = 20°C (ii) 470-273 = 197°C [/solution]...

## What type of clothes should we wear in summer?

[question] Question What type of clothes should we wear in summer? [/question] [solution] Solution We should wear light colored cotton clothes in summer. Light color because it reflects heat. Cotton clothes because it has pores in it, which absorbs sweat and allows the sweat to evaporate faster thereby giving cooling effect. [/solution]...

## Why does our palm feel cold when we put some acetone or petrol or perfume on it?

[question] Question Why does our palm feel cold when we put some acetone or petrol or perfume on it? [/question] [solution] Solution Acetone, petrol or perfume evaporate when they come into contact with air. The evaporation causes cooling sensation in our hands. [/solution]...

## How does the water kept in an earthen pot (matka) become cool during summer?

[question] Question How does the water kept in an earthen pot (matka) become cool during summer? [/question] [solution] Solution The earthen pot is porous with lot of pores on it, the water oozes out through these pores and the water gets evaporated at the surface of the pot thereby causing cooling effect. This makes the pot cold and the water inside the pot cools by this process. [/solution]...