Four identical metal cans, AAA, BBB, CCC, and DDD, are filled with the same volume of hot water and left to cool in a room. Which can will cool down to room temperature the fastest?
| Can | Outside surface of the can | Top of the can |
|---|---|---|
| A | dull black | covered with a lid |
| B | dull black | no lid |
| C | shiny silver | covered with a lid |
| D | shiny silver | no lid |
Can A
Can B
Can C
Can D
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.