試題詳解

34. Aluminum Rod #1 has a length L and a diameter d. Aluminum Rod #2 has a length 2L and a diameter 2d. If Rod #1 is under tension T and Rod #2 is under tension 2T, how do the changes in length of the two rods compare?
(A) They are the same.
(B) Rod #1 has double the change in length that Rod #2 has.
(C) Rod #2 has double the change in length that Rod #1 has.
(D) Rod #1 has quadruple the change in length that Rod #2 has.
(E) Rod #2 has quadruple the change in length that Rod #1 has.