Bell body and fuel cell: what they have in common

1. Step 1. Bell body — is part of — Bell. A cast body that rings when struck.
2. Step 2. Bell — is part of — Diving bell. A body open at the bottom.
3. Step 3. Diving bell — uses — Archimedes’ principle. Sinking with ballast.
4. Step 4. Archimedes’ principle — is used in — Weather balloon. A balloon filled with hydrogen or helium.
5. Step 5. Weather balloon — is made of — Hydrogen. Filled with hydrogen or helium.
6. Step 6. Hydrogen — is used in — Fuel cell. The fuel is hydrogen.

Open Evothings