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Describe the construction and working of...

Describe the construction and working of compound microscope.

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  3. Describe the construction and working of compound microscope.

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  11. If a body is charged by rubbing, its weight

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  12. Use your brain power! Why is coal called ‘black gold’?

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  13. Use your brain power! Can we use leaves of some other metal instead...

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  14. Use your brain power! What kind of damage is caused by a lightning ...

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  15. Use your brain power! What measures will you take to prevent the da...

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  16. Use your brain power! Why is the upper end of the lightning conduct...

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  17. Use your brain power! Why is coal called ‘black gold’?

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