🔧 How Things Work

Five micro-lessons · about 33 minutes in total

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← All 50 lessons

Fridges, microwaves, motors, batteries and flight — everyday engineering. Five lessons, about 33 minutes in total — read one at a time; each stands alone.

The five lessons

1. The Fridge: A Heat Courier

Cooling is not removing cold — it is pumping heat out, and the same trick can heat a house.

About 6 min · 1 quiz question

2. The Microwave Oven

Non-radioactive light that shakes water hot — and the myths that never die.

About 6 min · 1 quiz question

3. Motors and Generators: One Trick, Two Directions

Coils and magnets, why a fan is also a power plant, and how EVs recharge on hills.

About 7 min · 1 quiz question

4. Batteries: Slow Chemistry, Stored Sunshine

Li-ion shuttles ions, electrons detour through your phone — and why fuel still wins by weight.

About 7 min · 1 quiz question

5. How Planes Fly

Bent air and pressure differ — two names for one deal the wing makes with the sky.

About 7 min · 1 quiz question

Try it live

Further reading

Three real books on this track, from the Open Library catalogue — follow the links for libraries, previews and borrow options.

The research

The most-cited Crossref-indexed papers matching the topic — a window into how professionals actually study it.

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