A metal block at a high temperature emits thermal radiation into its surroundings. Which two properties of the block determine the rate at which it radiates this thermal energy?
the mass and the specific heat capacity of the block
the density and the surface area of the block
the surface area and the surface temperature of the block
the thermal conductivity and the volume of the block
301 exam-style questions on CIE IGCSE Physics 2.3 Transfer of thermal energy, covering 2.3.1a Thermal conductors and thermal insulators, 2.3.1b Explaining thermal conduction, 2.3.2 Convection, 2.3.3a Thermal radiation, 2.3.3b Surface colour and texture, 2.3.3c Rate of emission and absorption of radiation, and 2.3.4 Consequences of thermal energy transfer. Each one has a worked solution and a mark scheme showing where the marks go.