An aerospace engineer investigated the density of a newly developed lightweight ceramic insulation material.
To determine the volume of a small fragment of this ceramic, they used a gas pycnometer to measure the volume of gas displaced by the specimen.
The engineer measured the volume of one specimen three times. The three measurements were:
8.45 cm3,8.54 cm3,8.57 cm3 8.45\text{ cm}^3, \quad 8.54\text{ cm}^3, \quad 8.57\text{ cm}^3 8.45 cm3,8.54 cm3,8.57 cm3Calculate the mean volume of this specimen.
A second specimen of the ceramic has a mass of 19.8 g19.8\text{ g}19.8 g and a volume of 9.0 cm39.0\text{ cm}^39.0 cm3.
Calculate the density of this second specimen in g/cm3\text{g/cm}^3g/cm3.
Use the equation:
density=massvolume \text{density} = \frac{\text{mass}}{\text{volume}} density=volumemass22 exam-style questions on AQA GCSE Physics 3.1 Changes of state and the particle model, covering 3.1.1 Density of materials and 3.1.2 Changes of state. Each one has a worked solution and a mark scheme showing where the marks go.