A piece of copper wire of length \(100 \mathrm{~cm}\) at \(30^{\circ} \mathrm{C}\) is heated to \(120^{\circ} \mathrm{C}\). If its linear expansivity is \(1.8 \times 10^{-4} / k\), its new length is ____________

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A piece of copper wire of length \(100 \mathrm{~cm}\) at \(30^{\circ} \mathrm{C}\) is ...

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