Question 47
An old toy plane is made of brass, an alloy of copper and zinc. Some information on the metal composition of the toy is given in the table.
| Metal | Density / g/cm³ |
|:-|:-:|
| copper | 8.90 |
| zinc | 7.10 |
Total mass of the toy: 125 g. The toy plane was melted and mixed with another 5 g of copper. The mixture was then recast into a solid cube with a volume of 12 cm³. Calculate its new density and explain whether it would float or sink in water.
| Metal | Density / g/cm³ |
|:-|:-:|
| copper | 8.90 |
| zinc | 7.10 |
Total mass of the toy: 125 g. The toy plane was melted and mixed with another 5 g of copper. The mixture was then recast into a solid cube with a volume of 12 cm³. Calculate its new density and explain whether it would float or sink in water.
