Question

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Answer 1

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Answer 2

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let radius of wire A be x

initial length be a

yA = 9.8*a/πx^2*1

let change in length of B =dt

yB= 1.5*a*4*9.8*16/πx^2*25dt

YA =yB

9.8= 1.5*4*9.8*16/25dt

dt = 6*9.8*16/9.8*25

dt = 96/25

dt = 3.84mm

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