Hat crown e mechanical clock: o que têm em comum

1. Passo 1. Hat crown — faz parte de — Hat. The upper part.
2. Passo 2. Hat — é feito de — Feltro. Felt.
3. Passo 3. Feltro — é material para — Piano. The hammers are covered with felt.
4. Passo 4. Piano — utiliza — Tuning fork. Tuning.
5. Passo 5. Tuning fork — faz parte de — Quartz clock. Quartz shaped like a tuning fork at 32,768 Hz.
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.

Abrir Evothings