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A certain metal has a temperature coefficient of resistivity of 0.0049 (°C) ^-1. A wire made from that material is connected to a source of constant voltage via a switch. At the instant the switch is closed, the temperature of the wire is 22 °C, and the initial power dissipated in the wire is P₀. At what wire temperature has the power dissipated in the wire decreased to (1/2)P₀?

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