Print engine e heron’s aeolipile: o que têm em comum

1. Passo 1. Print engine — faz parte de — Printer. A laser, inkjet or dot-matrix unit.
2. Passo 2. Printer — funciona como — Gutenberg printing press. A printer is a personal printing press: it transfers an image onto paper.
3. Passo 3. Gutenberg printing press — utiliza — Paper. The impression is made on paper.
4. Passo 4. Paper — é material para — Rocket. The first rockets were paper tubes filled with gunpowder.
5. Passo 5. Rocket — utiliza — Reaction force. A rocket moves by reaction force.
6. Passo 6. Reaction force — é utilizado em — Heron’s aeolipile. Jets of steam spin the ball by reaction force.

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