What is thermal conductivity of a perfect heat conductors of a perfect heat conductor and a perfect heat insulator?

Explanation

To answer the question regarding the thermal conductivity of a perfect heat conductor and a perfect heat insulator, we can break it down into a step-by-step explanation.

### Step-by-Step Solution:

1. **Understanding Thermal Conductivity**:
- Thermal conductivity (K) is a measure of a material's ability to conduct heat. It quantifies how much heat energy is transferred through a material over a certain distance and time when there is a temperature difference.

2. **Perfect Heat Conductor**:
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