Use the Picture on the Right to Answer the Next

Multiple Choice

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