A high-purity copper busbar used in an electrical substation is machined in the shape of a rectangular cuboid with dimensions 15 mm by 40 mm by 80 mm.
The busbar has a mass of 427.2 g.
Calculate the density of this copper sample in g/cm3\text{g/cm}^3g/cm3.
55 exam-style questions on Edexcel GCSE Physics 14.1 Density and states of matter. Each one has a worked solution and a mark scheme showing where the marks go.