Superabsorbent and sonar: what they have in common

1. Step 1. Superabsorbent — uses — Capillary action. Absorption.
2. Step 2. Capillary action — is used in — Wick. Fuel rises up the wick by capillary forces.
3. Step 3. Wick — is part of — Lighter. Petrol lighters have a wick.
4. Step 4. Lighter — uses — Piezoelectric effect. Piezo lighters.
5. Step 5. Piezoelectric effect — is used in — Sonar. Langevin’s transducer is piezoelectric quartz.

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