Angular momentum and plumbing: what they have in common

1. Step 1. Angular momentum — is used in — Spindle. Spinning the spindle twists the thread.
2. Step 2. Spindle — is made of — Clay. The spindle whorl was shaped from clay or carved from stone.
3. Step 3. Clay — is material for — Plumbing. Minoan plumbing used ceramic pipes.

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