Imagine that we have a wire made of Manganin at 20 °C that has a resistance of 100 Ω. What would be its resistance at 60 °C?

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SUBSTANCE Aluminum Brass Constantan (60% Cu, 40% Ni) Copper Iron Manganin (84% Cu, 12% Mn, 4% Ni) Mercury Nichrome (59% Ni. 23% Cu, 16% Cr) Platinum Silver Tungsten Carbon Germanium Silicon Glass Neoprene Polyethylene Porcelain Porcelain Teflon Sodium chloride (saturated solution) Blood Fat *Values determined at or near 20 °C.. TABLE 26-1 Resistivities* RESISTIVITY (p) (IN 82 -m) 2.8 × 10-8 28 × 10-8 244 x 10-8 1.7 × 108 ≈10 × 108 44 x 10-8 96 × 10-8 100 × 10-8 10 × 10-8 1.6 × 10-8 5.5 × 10-8 3.5 x 10-5 0.46 100-1000 100-10¹4 10º 10%-10⁰ 107-10¹¹ 10¹-10¹2 10¹4 0.044 1.5 25