Hydrometer e screw press: o que têm em comum
- Passo 1. Hydrometer — é utilizado em — Lead–acid battery. A car battery's charge is checked with a hydrometer by the density of its acid.
- Passo 2. Lead–acid battery — faz parte de — Submarine. Underwater, electric motors run on batteries.
- Passo 3. Submarine — tem como parte — Propeller. A propeller.
- Passo 4. Propeller — utiliza — Screw. A propeller “screws” itself into the water, like an Archimedes’ screw.
- Passo 5. Screw — é utilizado em — Screw press. The force is produced by turning a screw.