Physics

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The drawing shows three cylinders that have the same length and cross-sectional areas, but each is made of different material. The cylinders are arranged in series, so that heat is conducted from the left toward the right. The temperatures at the interfaces between the materials are indicated. Rank the thermal conductivities of the three materials, which are labeled A, B, and C, from the lowest to the highest value.





kB < kC < kA


kA < kC < kB


kC < kA < kB


kA < kB < kC


kB < kC < kA

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