Stainless steel cooking pans are preferred with an extra copper bottom. Why?

Explanation

**Step-by-Step Solution:**

1. **Understanding Thermal Conductivity:**
- Thermal conductivity is a measure of how well a material can conduct heat. Different materials have different thermal conductivities.

2. **Comparison of Materials:**
- Stainless steel has relatively low thermal conductivity compared to copper. This means that stainless steel does not transfer heat as efficiently as copper does.

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