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Why do electrons in insulators not contr...

Why do electrons in insulators not contribute to its conductivity?

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SL ARORA-Thermal Properties of Matter-Exercise
  1. Explain why a brass tumbler feels much colder than a wooden tray on a ...

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  2. Usually a good conductor of heat is a good conductor of electricity al...

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  3. Why do electrons in insulators not contribute to its conductivity?

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  4. As air is a bad conductor of heat, whu do we not feel warm without clo...

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  5. Room are provided with the ventilators near the roof. Why?

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  6. Why snow is better heat insulator than ice?

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  7. We cannot boil water inside the earth's satellite. Explain.

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  8. Water is heated from below but not from top. Why?

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  9. Statement-1: Coolant coils are fitted at the top of a refrigerator , f...

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  10. The earth constantly receives heat radiation from the sun and gets war...

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  11. Animals curl into a ball, when they feel very cold.

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  12. A poor emitter has a large reflectivity. Explain why.

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  13. when a piece of red glass heated in a furnace is taken out, it glows w...

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  14. Two stars radiate maximum energy at wavelength 3.6 xx 10^(-7)m and 4.8...

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  15. Is it necessary that all black coloured objects should be considered b...

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  16. Why are clear nights colder than cloudy nights ?

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  17. White clothes are more comfortable in summer while coloured clothes ar...

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  18. Wien's displacement law fails for

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  19. In what respect, the thermal radiations are different from light radia...

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  20. What is critical temperature?

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