Rotating gun mount e mechanical clock: o que têm em comum

1. Passo 1. Rotating gun mount — faz parte de — Canhão antiaéreo. All-round traverse.
2. Passo 2. Canhão antiaéreo — utiliza — Radar. Radar guidance.
3. Passo 3. Radar — funciona como — Sonar. The same echolocation principle: sound in water instead of radio waves.
4. Passo 4. Sonar — utiliza — Piezoelectric effect. Langevin’s transducer is piezoelectric quartz.
5. Passo 5. Piezoelectric effect — é utilizado em — Quartz clock. The quartz resonator vibrates thanks to the piezoelectric effect.
6. Passo 6. Quartz clock — evoluiu de — Mechanical clock. Quartz clocks replaced mechanical ones: a vibrating quartz crystal took the place of the pendulum and balance.

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