A technician wants to fit a brass ring onto an iron peg. The peg is just too large to fit through the central hole of the ring.
How can the technician fit the ring onto the peg?
Cool the ring and slip it over the peg.
Cool both the ring and the peg to the same temperature and push them together.
Heat the peg and then try to insert it into the ring.
Heat the ring and then slide it over the peg.
96 exam-style questions on CIE IGCSE Physics 2.2.1 Thermal expansion of solids, liquids and gases. Each one has a worked solution and a mark scheme showing where the marks go.