Mercury e programmable logic controller: o que têm em comum

1. Passo 1. Mercury — faz parte de — Hydrometer. Old hydrometers used mercury or lead shot as the weight to keep them upright.
2. Passo 2. Hydrometer — é utilizado em — Lead–acid battery. A car battery's charge is checked with a hydrometer by the density of its acid.
3. Passo 3. Lead–acid battery — utiliza — Sulfuric acid. The electrolyte.
4. Passo 4. Sulfuric acid — é utilizado em — Planta química. The first chemical plants produced sulfuric acid and soda.
5. Passo 5. Planta química — tem como parte — Programmable logic controller. Process control automation.

Abrir Evothings