A metal washer (a flat circular disk with a central circular hole) is heated uniformly. What happens to its outer diameter and the diameter of the central hole?
Both the outer diameter and the hole diameter increase.
The outer diameter increases, but the hole diameter decreases.
The outer diameter increases, and the hole diameter remains unchanged.
Both the outer diameter and the hole diameter decrease.
528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.