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A ring has a mass of 10.5 g. Nikhil lowers it into a measuring cylinder, and the water level rises…

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Try it on paper first. A hint, the key idea and the worked solution are here when you need them.

A ring has a mass of $10.5\ \text{g}$ . Nikhil lowers it into a measuring cylinder, and the water level rises from $20.0\ \text{mL}$ to $21.0\ \text{mL}$ . Silver has a density of $10.5\ \text{g/cm}^3$ and gold of $19.3\ \text{g/cm}^3$ . Find the density of the ring. Could it be pure silver?

Need a reminder? The key ideaShow

Density is mass per unit volume, $d = \dfrac{m}{V}$ . The volume of an odd-shaped solid is the rise of the water level when the solid is lowered into a measuring cylinder. $1\ \text{mL} = 1\ \text{cm}^3$ .

The worked solution

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Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.

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