Hairpin and fuel cell: what they have in common

1. Step 1. Hairpin — uses — Elasticity. Elasticity.
2. Step 2. Elasticity — is used in — Tennis racket. Strings.
3. Step 3. Tennis racket — is made of — Carbon fibre. Modern frames.
4. Step 4. Carbon fibre — is material for — Hydrogen car. The tanks are carbon fibre.
5. Step 5. Hydrogen car — has part — Fuel cell. A fuel cell.

Open Evothings