Online courses e autoclave: o que têm em comum

1. Passo 1. Online courses — utiliza — World Wide Web. The web.
2. Passo 2. World Wide Web — foi inspirado por — Particle accelerator. The web was invented at CERN for sharing physicists’ data.
3. Passo 3. Particle accelerator — utiliza — Vacuum. A vacuum chamber.
4. Passo 4. Vacuum — é utilizado em — Barômetro. The Torricellian vacuum above the mercury.
5. Passo 5. Barômetro — funciona como — Manometer. Both measure pressure with a column of liquid: a barometer measures the air around us, a manometer the pressure inside a vessel.
6. Passo 6. Manometer — faz parte de — Autoclave. The gauge shows whether the steam pressure in the chamber is high enough to sterilize.

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