Two Wires,A and B,have the Same Initial Length,but the Radius

question 15

Multiple Choice

Two wires,A and B,have the same initial length,but the radius of A is four times that of B,and the Young's modulus of A is a third that of B.If the same weight is attached to both wires,what is the ratio of the extension of A divided by the extension of B?

• A)0.19
• B)48
• C)5.3
• D)1.3
• E)0.75

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