rahil took a woolen fibre and burnt it . later he took a silk fibre and burnt it . what observation can you predict
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that silk fibre can burnt much faster than the woollen fibre. I think that
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rahil
observed that when woolen fibre is burnt .it shrinks down from the flame but doesn't melt. Residue is black , hollow irregular bead . but on the other hand when he took Silk fibre and burnt it .. it changes into gritty, grayish -black ash powder.
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