Bronze toads with open mouths e sickle: o que têm em comum

1. Passo 1. Bronze toads with open mouths — faz parte de — Zhang Heng’s seismoscope. They catch the ball when it drops.
2. Passo 2. Zhang Heng’s seismoscope — utiliza — Pendulum. An internal pendulum (according to reconstructions).
3. Passo 3. Pendulum — faz parte de — Pendulum clock. The pendulum sets the period.
4. Passo 4. Pendulum clock — tem como parte — Gear. A wheel train.
5. Passo 5. Gear — faz parte de — Lawn mower. The wheels turn the blade cylinder through gears.
6. Passo 6. Lawn mower — evoluiu de — Sickle. Mechanized mowing.

Abrir Evothings