How Things Work
6 boards, 12 lessons, 96 review questions, in 2 chapters. Read them in order. Each chapter builds on the one before.
Your progress0 of 12 read
Start here → Entropy - why time only points forward
Contents
1Everyday Physics7 lessons
Why time has a direction, why cold is a lie, why a fan cools you and not the room, why a lid cooks faster, how a screen fakes every colour, and why glass is clear.
- 01Entropy - why time only points forward8 Q
- 02Cold Is a Lie - fridge, AC, heat pump11 Q
- 03Your Remote Throws Invisible Light - the EM spectrum11 Q
- 04Why a Fan Cools You, Not the Room - evaporation & boundary layers10 Q
- 05The Lid That Cooks Faster - boiling point, pressure cookers, tyres and taps7 Q
- 06Three Lights Pretending to Be Every Colour - screens, eyes and cameras7 Q
- 07Why You Can See Through Sand - band gaps, glass, metal and silicon7 Q
2Machines at Home5 lessons
Why twice the speed needs four times the stop, what volts, amps and watts are, how one idea spins every motor, where the socket's power comes from, and how to estimate your own bill.
- 01Twice the Speed, Four Times the Stop - braking, crumple zones and seatbelts8 Q
- 02The Socket Is a Waterfall - volts, amps, watts and the bill7 Q
- 03Spin From a Wire - motors, generators, speakers and the induction hob7 Q
- 04Every Plug Ends at a Spinning Magnet - power stations, fission and the solar exception7 Q
- 05Your Home, Estimated - Fermi problems and a home energy audit6 Q
