Water wheel e relógio atômico: o que têm em comum

1. Passo 1. Water wheel — utiliza — Gravity flow. Falling or flowing water turns the wheel.
2. Passo 2. Gravity flow — é utilizado em — Water clock (clepsydra). Water flows out at a constant rate under gravity.
3. Passo 3. Water clock (clepsydra) — evoluiu para — Mechanical clock. Mechanical clocks replaced water clocks, swapping the flow of water for an escapement.
4. Passo 4. Mechanical clock — evoluiu para — Quartz clock. Quartz clocks replaced mechanical ones: a vibrating quartz crystal took the place of the pendulum and balance.
5. Passo 5. Quartz clock — evoluiu para — Relógio atômico. The quartz oscillator is tuned to an atomic standard.

Abrir Evothings