We can use Fourier's law of heat conduction, which states:
\[ q = -k \frac{dT}{dz} \]
where:
- \( q \) is the heat flux (energy conducted per unit area per unit time, in W/m²),
- \( k \) is the thermal conductivity (in W/(m·K)),
- \( \frac{dT}{dz} \) is the
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