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Answer the question in short: Why are t...

Answer the question in short:
Why are thin bottom copper vessels applied with a layer of mud from outside while cooking?

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  8. Answer the question with neat and well labelled diagrams: Explain the...

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  9. Answer the question with neat and well labeled diagrams: Draw a well ...

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  10. Explain the following: Conduction of heat:

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  11. Explain the following: Convection of heat

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  12. Explain the following: Radiation

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  13. Use your brain power: Why do we wear woolen clothes in winter?

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  18. Give scientific reasons: The telephone wires which sag in summer beco...

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  19. Give scientific reasons: Dew drops are formed on the grass in winter.

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