Wooden tone bars and electrical grid: what they have in common

1. Step 1. Wooden tone bars — is part of — Xylophone. Wooden bars tuned by length.
2. Step 2. Xylophone — uses — Resonance. Resonating bars.
3. Step 3. Resonance — is used in — Tesla coil. A resonant circuit.
4. Step 4. Tesla coil — uses — Electromagnetic induction. A transformer.
5. Step 5. Electromagnetic induction — is used in — Transformer. Induction between the windings.
6. Step 6. Transformer — is part of — Electrical grid. Transformer substations.

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