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As the temperature of a metal rod varies, so does the resistance and the dimensions of...

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Physics

As the temperature of a metal rod varies, so does the resistanceand the dimensions of the rod. If a copper rod has a resistance of4.78 Ω at 20.0°C, determine the resistance of the rod (in Ω) at120°C by accounting for the changes in both the resistivity and thedimensions of the rod. The coefficient of linear expansion forcopper is 1.67 ✕ 10−5 (°C)−1 and the temperature coefficient ofresistivity is 4.04 ✕ 10−3 (°C)−1.

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