Periscope e mechanical clock: o que têm em comum

1. Passo 1. Periscope — faz parte de — Submarine. A periscope.
2. Passo 2. Submarine — tem como parte — Sonar. Underwater acoustics.
3. Passo 3. Sonar — utiliza — Piezoelectric effect. Langevin’s transducer is piezoelectric quartz.
4. Passo 4. Piezoelectric effect — é utilizado em — Quartz clock. The quartz resonator vibrates thanks to the piezoelectric effect.
5. Passo 5. 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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