Potentiometer and kiln: what they have in common

1. Step 1. Potentiometer — is made of — Nickel. The resistance wire is a nickel alloy.
2. Step 2. Nickel — is material for — Stainless steel. Nickel in austenitic steels.
3. Step 3. Stainless steel — is material for — Saucepan. Stainless steel.
4. Step 4. Saucepan — evolved from — Pottery. The first pots were ceramic.
5. Step 5. Pottery — uses — Kiln. Firing in a kiln makes clay strong.

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