Sundial e hydraulic press: o que têm em comum

1. Passo 1. Sundial — utiliza — Euclidean geometry. The scale is marked by the angle of the shadow.
2. Passo 2. Euclidean geometry — é utilizado em — Weather station. Instruments are set up on a site according to a standard.
3. Passo 3. Weather station — tem como parte — Barômetro. A barometer.
4. Passo 4. 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.
5. Passo 5. Manometer — utiliza — Hydraulics (Pascal’s law). A liquid manometer is a pair of communicating vessels: the difference in levels shows the pressure.
6. Passo 6. Hydraulics (Pascal’s law) — é utilizado em — Hydraulic press. Pascal’s law multiplies the force.

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