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Copper has electrical conductivity at 300 K as 6.40 107 m-. Calculate the thermal conductivity of copper.(Lorentz number is 2.44 10-8 W k).

Copper has electrical conductivity at 300 K as 6.40 × 107 m-¹. Calculate the thermal conductivity of copper.(Lorentz number is 2.44 × 10-8 W k²).

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