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A steel wire of length 1.40 m and diameter 1.00 mm is joined to an aluminum wire of identical dimensions to make a
composite wire of length 2.80 m.
What is the resulting change in length AL of this
composite wire if an object with a mass of 5.00 kg is hung
vertically from one of its ends? (Neglect any effect the
masses of two wires have on the changes in their lengths.)
AL =
1.751
Incorrect
mm

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