Clock dial e relógio atômico: o que têm em comum

1. Passo 1. Clock dial — faz parte de — Tower clock. Large dials on the faces of the tower.
2. Passo 2. Tower clock — é um tipo de — Mechanical clock. A clock.
3. Passo 3. Mechanical clock — evoluiu para — Quartz clock. Quartz clocks replaced mechanical ones: a vibrating quartz crystal took the place of the pendulum and balance.
4. Passo 4. Quartz clock — evoluiu para — Relógio atômico. The quartz oscillator is tuned to an atomic standard.

Abrir Evothings