Mathematics · Elasticity
A copper wire is of the same length but double the diameter of a steel wire. Both wires, hung from the same roof, are stretched by the same stretching force. If Δlc and Yc are the elongation and Young's modulus of copper respectively, and Δls and Ys are the same for steel, and Yc = 5 Ys, then what is the value of Δlc/Δls?
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