A copper wire LM is fused at one end, M, to an iron wire MN, figure 6C (ii). the copper wire has length 0.900m and cross-section 0.90x10^-6 m^2. the iron wire has its length 1.400 and cross-section 1.30x10^-6 m^2. the compound wire is stretched, its total length increases by 0.0100m calculate i. the ratio of the the extensions of the two wires, ii. the extension of each wire. iii. the tension applied to the tension wire.
(the young modulus of copper = 1.30x10^11 Pa. the young modulus of iron = 2.10x10^11 Pa.) (L.)?
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Asked by Victor on 13th December, 2021
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