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A metal wire has a resistance of 25.00 W at 25 °C. When the wire is heated to 85°C the resistance increases by 0.35 W. What is the temperature coefficient of resistivity for this metal?

2.33 x 10^-4 /°C
1.6 x 10^-2 /°C
1.5 x 10^-3 /°C
8.6 x 10^-4 /°C

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