Carburettor and mechanical clock: what they have in common

1. Step 1. Carburettor — has part — Valve. A throttle valve in the carburettor sets how much fuel-air mix reaches the engine.
2. Step 2. Valve — is part of — Valve trumpet. Valves.
3. Step 3. Valve trumpet — uses — Resonance. Resonance of the tube.
4. Step 4. Resonance — is used in — Quartz clock. Resonance of the crystal.
5. Step 5. Quartz clock — evolved from — Mechanical clock. Quartz clocks replaced mechanical ones: a vibrating quartz crystal took the place of the pendulum and balance.

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