Pearson Edexcel International GCSE in Physics · 4PH1
Topic 4 · Energy resources and energy transfers
Energy stores and the transfers between them, efficiency and Sankey diagrams, conduction, convection and radiation, work, power, GPE and KE, and how electricity is actually generated.
7 lessons, covering 19 specification statements: 4.1 · 4.2 · 4.3 · 4.4 · 4.5 · 4.10 · 4.6 · 4.7 · 4.8 · 4.9 · 4.11 · 4.12 · 4.13 · 4.14 · 4.15 · 4.16 · 4.17 · 4.18 · 4.19
The lessons
- Energy Stores and Transfers — Where energy sits, how it moves, and why it is never used up however much it feels like it. (4.1, 4.2, 4.3)
- Efficiency, Sankey Diagrams and Insulation — Working out what share of the energy did the job you wanted — and why the answer is never all of it. (4.4, 4.5, 4.10)
- Conduction, Convection and Radiation — Three ways energy moves from hot to cold — and the one question that tells them apart. (4.6, 4.7, 4.8, 4.9)
- Work Done — The precise meaning of a word everybody thinks they already know — and why holding something still is not work at all. (4.11, 4.12)
- Gravitational Potential and Kinetic Energy — Two equations, one conversion — and why the square in the second one changes everything. (4.13, 4.14, 4.15)
- Power — Not how much energy, but how fast — and why that is the number people actually buy. (4.16, 4.17)
- Generating Electricity — Seven ways of turning something into electricity — and the trade-offs that make the choice hard. (4.18, 4.19)