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"Birds swell their feathers in winter." ...

"Birds swell their feathers in winter." Why?

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ICSE-THERMAL CONDUCTION-SHORT ANSWER QUESTIONS
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  2. Define thermal conductivity. Give its S.I. unit and dimensional formul...

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  3. "After the steady state, the temperature of a conductor does not rise,...

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  4. When you touch a piece of metal and a piece of wood simultaneously, me...

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  6. The specimen is taken in the form of 'disc' in Lee's disc method to fi...

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  7. "Cooking utensils are provided with wooden handles". Why ?

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  8. "Ice is packed in saw dust". Why ?

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  9. "Birds swell their feathers in winter." Why?

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  10. "In winter metals appear colder than wood." Why ?

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  11. Is there any connection between object's feeling hot or cold and its t...

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  12. In what way the steady state heat flow analog to the flow of (i) an el...

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  13. "A blanket keeps our body warm in winter, but the same blanket can pro...

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  14. The top of a lake is frozen. Air in contact is at - 15°C. What do you ...

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  15. Two rods A and B are of equal length. Each rod has its ends at tempera...

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  16. A composite slab is made of two parallel layers of two different mater...

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  17. Explain the difference between 'steady state' and 'variable state' of ...

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  18. What is the significance of Wiedmann Franz law ?

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  19. Mention the two processes responsible for the conduction of heat.

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