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Quick Revision Table
| Concept | Key Formula / Fact | Exam Relevance |
|---|---|---|
| Newton's 2nd Law | F = ma | Motion 5-mark |
| Kinetic Energy | KE = ½mv² | Work-energy theorem |
| Escape Velocity (Earth) | 11.2 km/s | Gravitation / satellites |
| Speed of Light | 3 × 10⁸ m/s | Light, EM waves |
| Critical Angle (glass) | ≈ 42° → TIR | Optical fibre, diamond |
| Ohm's Law | V = IR | Electricity 2-mark |
| 1 kWh | 3.6 MJ | Electrical energy unit |
| Faraday (EM Induction) | 1831; generator/transformer basis | Electricity 5-mark |
| Sound in air (0°C) | 332 m/s | Sound, ultrasound |
| Ultrasound frequency | > 20,000 Hz | Medical diagnostics |
| X-ray Discovery | Röntgen, 1895; Nobel 1901 | Medical diagnostics |
| MRI field strength | 1.5–3 Tesla | Medical diagnostics |
| U-235 fission energy | ~200 MeV per fission | Nuclear physics |
| ITER | France, 35 nations; 2025 plasma | Fusion 5-mark |
| Radiation ALARA | Time, Distance, Shielding | Radiation safety |