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What type of clothes should we wear in s...

What type of clothes should we wear in summer?

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We should wear cotton clothes in summers as cotton is a good sweat absorber, Sweat is absorbed by the cotton and is exposed to the atmosphere making evaporation faster. During this evaporation particles on the surface of the liquid gain energy from our body surface, making the body cool
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NCERT ENGLISH-MATTER IN OUR SURROUNDINGS-Exercise
  1. Give reasons (a) A gas fills completely the vessel in which it is ke...

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  2. Liquids generally have lower density as compared to solids but you mus...

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  3. Convert the following temperatures to the celsius scale. (a) 300k (...

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  4. What is the physical state of water at: a. 250^(@)C b. 100^(@)C?

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  5. For any substance, why does the temperature remains constant during th...

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  6. Suggest a method to liquefy atmospheric gases.

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  7. Why does a desert cooler cool better on a hot dry day?

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  8. How does the water kept in an earthen pot (mataka) become cool during ...

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  9. Why does our palm feel cold when we put some acetone or petrol or per...

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  10. Why are we able to sip hot tea or milk faster from a saucer rather tha...

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  11. What type of clothes should we wear in summer?

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  12. Convert the following temperatures to the celsius scale. (a) 293k (...

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  13. Convert the folowing temperature to the kelvin scale. (a) 25^(@)C (b...

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  14. Give reason for the following observations. (a) Naphthalene balls d...

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  15. Arrange the following substances in increasing order of forces of attr...

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  16. What is the physical state of water at- (a) 25^(@) (b) 0^(@)C (c) 1...

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  17. Give two reasons to justify- (a) Water at room temperaure is a liqui...

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  18. Why is ice at 273k more effective in cooling than water at the same te...

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  19. What produces more severe burns, boiling water or steam?

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  20. Name A,B,C,D,E and F in the followng diagram showing change in its sta...

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