Electric arc and elevator: what they have in common

1. Step 1. Electric arc — is used in — Photographic flash. A discharge in a xenon lamp.
2. Step 2. Photographic flash — has part — Capacitor. Energy is stored in a capacitor.
3. Step 3. Capacitor — is made of — Tin. The plates are made of tin foil.
4. Step 4. Tin — is used in — Float glass. Glass spreads out over molten tin.
5. Step 5. Float glass — is material for — Skyscraper. Glazing.
6. Step 6. Skyscraper — has part — Elevator. A skyscraper is impossible without a lift.

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