What is the resistance between the ends of welded bar


Two cylindrical bars, each with diameter of 2.50 cm, are welded together end to end. One of the original bars is copper and is 0.360 m long. The other bar is iron and is 0.180 m long. What is the resistance between the ends of the welded bar at 20°C?

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Physics: What is the resistance between the ends of welded bar
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