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प्रश्न
The density of iron is 7800 kg m-3. What do you mean by this statement? What is density of water at 40C?
उत्तर
Density of iron is 7800Kgm-3.
This means a cube of iron having side 1m would weigh 7800 Kg.
Density of water at 4oC is 1000 Kgm-3.
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