Zhang Heng’s seismoscope e turbojet engine: 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 — Newton’s laws. The swing is described by Newtonian mechanics.
3. Passo 3. Newton’s laws — inclui — Reaction force. Reaction is Newton’s third law.
4. Passo 4. Reaction force — é utilizado em — Turbojet engine. Thrust is the reaction of the jet.

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