A copper wire of length 1.0 m and a steel wire of length 0.5 m having equal cross-sectional areas are joined end to end. The composite wire is stretched by a certain load which stretches the copper wire by 1 mm. If the Young's moduli of copper and steel are 1.0×1011 Nm−2 and 2.0×1011 Nm−2, the total extension of the composite wire is

A copper wire of length 1.0 m and a steel wire of length 0.5 m having

1.	A copper wire of length 1.0 m and a steel wire of length 0.5 m having equal cross-sectional areas are joined end to end. The composite wire is stretched by a certain load which stretches the copper wire by 1 mm. If the Young's moduli of copper and steel are 1.0×1011 Nm−2 and 2.0×1011 Nm−2, the total extension of the composite wire is
Answer» A copper wire of length 1.0 m and a steel wire of length 0.5 m having equal cross-sectional areas are joined end to end. The composite wire is stretched by a certain load which stretches the copper wire by 1 mm. If the Young's moduli of copper and steel are $1.0 \times 10^{11} N m^{- 2}$ and $2.0 \times 10^{11} N m^{- 2}$ , the total extension of the composite wire is

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