Energy density of wire is 0.25 J/m³, when its extension is 0.2 cm. Find energy of wire, when elongation is 1 cm. 1 (a) 1000 (c) 25 4 J/m³ 5 7 J/m³ (b) (d) J/m³ 2,5 J/n 2 J/m³
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