HS Physics — the staged course

All 875 lessons across seventeen units, authoring complete 13 October 2026. Awaiting James's end review and deploy word.

0	Introduction to physics	1
1	Measurement toolkit; position, distance, and displacement	90
2	Vectors: drawing, measuring and combining	53
3	Forces, weight and mass	79
4	Momentum and impulse	57
5	Describing rotation	59
6	Work as energy transfer	63
7	Systems and the energy ledger	30
8	The field idea	65
9	Current, voltage, resistance, and circuit diagrams	59
10	Magnets and magnetic fields; electromagnets	68
11	Oscillations and wave anatomy	69
12	Electromagnetic waves	31
13	Light rays and plane mirrors	54
14	The photoelectric effect and the wave model	32
15	Quarks, leptons, and the four fundamental forces	39
16	Mass-energy equivalence	26