Use the picture on the right to answer the next question. A steel wire and an aluminum wire of the same length L and diameter d are joined to form a wire of length 2L.The wire is fastened to the ceiling and a mass m is attached to the other end.
-The amount of expansion in the aluminum portion is ____ the steel portion.
A)less than
B)equal to
C)greater than
D)depends on how tight m is attached to the steel
E)unable to tell

Question

Use the picture on the right to answer the next question. A steel wire and an aluminum wire of the same length L and diameter d are joined to form a wire of length 2L.The wire is fastened to the ceiling and a mass m is attached to the other end. 
-The amount of expansion in the aluminum portion is ____ the steel portion.
A)less than 
B)equal to 
C)greater than 
D)depends on how tight m is attached to the steel 
E)unable to tell

Quizplus · Accepted Answer

Aluminum generally has a higher coefficient of thermal expansion compared to steel, meaning that for a given temperature change, the aluminum portion will expand more than the steel portion.

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