Tin and transformer: what they have in common

1. Step 1. Tin — is material for — Capacitor. The plates are made of tin foil.
2. Step 2. Capacitor — is part of — Defibrillator. The energy of the shock is stored in a capacitor.
3. Step 3. Defibrillator — has part — Transformer. Stepping up the voltage.

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