Wires, One Copper and the Other Steel, of Equal Length $E _ { s } = 210 \mathrm { GPa } \text { and } E _ { c } = 120 \mathrm { GPa } .$

question 7

Multiple Choice

wires, one copper and the other steel, of equal length stretch the same amount under an applied load P. The moduli of elasticity for each is $E _ { s } = 210 \mathrm { GPa } \text { and } E _ { c } = 120 \mathrm { GPa } .$ GPa. The ratio of the diameter of the copper Wire to that of the steel wire is approximately:

• A) 1.00
• B) 1.08
• C) 1.19
• D) 1.32

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