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Calculate the heat flux (W / m2) through a composite wall made of material A whose...

Calculate the heat flux (W / m2) through a composite wall made of material A
whose k = 40 W / m-K and has a thickness of 30 cm, a material B whose k = 0.05 W / m-K and a
thickness of 3 cm; and a material C whose k = 0.004 W / m-K, its thickness is 0.5 cm.

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