question archive A certain wire stretches 0

A certain wire stretches 0

Subject:BiologyPrice:2.87 Bought7

A certain wire stretches 0.90 cm when outward forces with magnitude F are applied to each end. The same forces are applied to a wire of the same material but with three times the diameter and three times the length. The second wire stretches: A. 0.90 cm B. 0.10 cm C. 2.7 cm D. 0.30 cm E. 8.1 cm

pur-new-sol

Purchase A New Answer

Custom new solution created by our subject matter experts

GET A QUOTE

Answer Preview

Answer:

Y = (F*L)/(A*x) => FL/A = Yx
Ist case: F, x = 0.9cm, A, L
IInd Case: F, x' = ?, A' = 9A, L' = 3L
Y = (F*L')/(A'*x')
=>Y = 3FL/(9Ax') = (1/3x')*(FL/A) = (1/3x')*Yx
=>3x' = x => x' = x/3 = 0.9/3 = 0.3cm..........Option D

Related Questions