Four containers, A, B, C, and D, are filled with the same volume of hot water at the same initial temperature and left in a cool room.
Which container will cool down the fastest?
| Container | Outer surface of the container | Top of the container |
|---|---|---|
| A | shiny silver | covered with a lid |
| B | shiny silver | open (no lid) |
| C | dull black | covered with a lid |
| D | dull black | open (no lid) |
Container A
Container B
Container C
Container 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.