Zhang Heng’s seismoscope e saw: o que têm em comum

1. Passo 1. Zhang Heng’s seismoscope — utiliza — Pendulum. An internal pendulum (according to reconstructions).
2. Passo 2. Pendulum — utiliza — Universal gravitation. The restoring force is gravity.
3. Passo 3. Universal gravitation — é utilizado em — Gravity flow. It flows downhill under gravity.
4. Passo 4. Gravity flow — é utilizado em — Water wheel. Falling or flowing water turns the wheel.
5. Passo 5. Water wheel — faz parte de — Sawmill. Early sawmills were driven by water wheels.
6. Passo 6. Sawmill — utiliza — Saw. The cutting tool is a saw.

Abrir Evothings