A student repeats a cooling experiment using identical cans. The temperature decreases in 4.0 min are shown.
| Surface | Trial 1 in ∘C^\circ\mathrm{C}∘C | Trial 2 in ∘C^\circ\mathrm{C}∘C | Trial 3 in ∘C^\circ\mathrm{C}∘C |
|---|---|---|---|
| matt black | 8 | 10 | 9 |
| shiny silver | 3 | 5 | 4 |
All trials use equal water masses and the same starting temperature. How much greater is the mean rate of temperature decrease for matt black?
1.00 ∘C/min1.00\,^\circ\mathrm{C/min}1.00∘C/min
2.25 ∘C/min2.25\,^\circ\mathrm{C/min}2.25∘C/min
1.25 ∘C/min1.25\,^\circ\mathrm{C/min}1.25∘C/min
5.00 ∘C/min5.00\,^\circ\mathrm{C/min}5.00∘C/min
96 exam-style questions on Edexcel GCSE Physics 5.3 Black body radiation, covering 5.3.1 Emission of radiation and temperature, 5.3.2 Radiation balance and constant temperature, and 5.3.3 The temperature of the Earth. Each one has a worked solution and a mark scheme showing where the marks go.