A copper wire should be strung between two electric poles, which are 80 m apart. How big should it be? be the smallest length of the copper wire at temperature t1=30°C so that it does not tighten in winter, when will the temperature t2= 30° C? alpha= 1.7 * 10⁵ 1/°C

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05-11-2022
Physics

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A copper wire should be strung between two electric poles, which are 80 m apart. How big should it be? be the smallest length of the copper wire at temperature t1=30°C so that it does not tighten in winter, when will the temperature t2= 30° C? alpha= 1.7 * 10⁵ 1/°C

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