Whistle and camera: what they have in common

1. Step 1. Whistle — uses — Resonance. Resonance of the chamber.
2. Step 2. Resonance — is used in — Tesla coil. A resonant circuit.
3. Step 3. Tesla coil — has part — Capacitor. A capacitor.
4. Step 4. Capacitor — is part of — Photographic flash. Energy is stored in a capacitor.
5. Step 5. Photographic flash — is part of — Camera. A flash.

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