Gutta-percha and centrifugal pump: what they have in common

1. Step 1. Gutta-percha — is material for — Golf ball. “Gutty” balls were gutta-percha.
2. Step 2. Golf ball — uses — Drag. The dimples reduce drag.
3. Step 3. Drag — is used in — Wind tunnel. Measuring resistance.
4. Step 4. Wind tunnel — has part — Electric fan. A fan.
5. Step 5. Electric fan — has part — Impeller. A fan's blades are an impeller that pushes the air.
6. Step 6. Impeller — is part of — Centrifugal pump. The impeller accelerates the liquid.

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