An engineer suspends a metal cable between two pylons during a very hot day. He pulls the cable very tight with minimal slack. The weather changes and it becomes extremely cold. What could happen to the cable and why?
It breaks because it contracts
It breaks because it expands
It sags more because it contracts
It sags more because it expands
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.