A ring has a mass of $5 \mathrm{g}$and occupies a volume of $0.34 {\mathrm{cm}}^3$. Pure gold has a density of $19.3 \mathrm{g}/{\mathrm{cm}}^3$. Is the ring made of pure gold?

Use the number line in the figure given below. Which substance will float on water?

The above number line showing the densities of different substance.

Use the number line in the figure given below. Which substance will sink in water?

The above number line showing the densities of a different substance.