You find a bag of cotton and an iron bar each indicating a mass of 100kg when measured on the weighing machine, in reality one is heavier than the other which one is heavier than the other and why?
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cotton; as there is more space between its particles which is fulfilled by air and mass of air is also added
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iron is heavier than the cotton because the cotton is very less weight
but the iron contains more weight
but the iron contains more weight
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