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प्रश्न
The density of copper is 8.9 g cm-3. What will be its density in kg m-3 ?
उत्तर
Density of copper d = 8.9 g `"cm"^-3`
= 8.9 x 1000 kg `"m"^-3`
[ ∴ 1 g `"cm"^-3 = 1000 "kg m"^-3`]
= 8900 kg `"m"^-3`
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