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The density of water is $1000 \mathrm{~kg} / \mathrm{m}^{3}$ and the density of copper is 8900 $\mathrm{kg} / \mathrm{m}^{3}$. Which of the following statements is incorrect?

(a)

$\frac{\text { The density of a certain volume of copper }}{\text { The density of the same volume of water }}=8.9$

(b) $\frac{\text { The volume of a certain mass of copper }}{\text { The volume of the same mass of water }}=8.9$

(c) $\frac{\text { The weight of a certain volume of copper }}{\text { The weight of the same volume of water }}=8.9$

(d) $\frac{\text { The mass of a certain volume of copper }}{\text { The mass of the same volume of water }}=8.9$

Density is defined as the ratio of the mass of the object to the volume of the object.

So the correct option is (B)

$\frac{\text { The volume of a certain mass of copper }}{\text { The volume of the same mass of water }}=8.9$

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