copper wire 5m long and sleel wire 25m long each of crose-seclional auea l:0mm2 aee faslened to end This compound ure u esubjected to equal t opposite" fulle of magniludo 28 N Calculale change in fength of each oire. Y fou copper = 12:5x10"N/m2 Y fee sleel = 9.0× l0"N|/m2- cuise ės %3D
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