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The thermal conductivity of steel is 50 W/(mK). A steel rod, well insulated along its 3.7-m length, has a cross-sectional area of 0.0025 m 2

The thermal conductivity of steel is 50 W/(m·K). A steel rod, well insulated along its 3.7-m length, has a cross-sectional area of 0.0025 m2. When heat flows along the length of the rod at the rate of 8.2 joules per second, what is the temperature difference between the rod’s ends is most nearly?

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