本题目来源于试卷: Physics Unit11: Vibrations and Waves，类别为 通用国际物理
[单选题]
A string of mass m and lh7kn ) k w*uc).m8rehoength L is under tension T. The speed of a xoe u+3 9uu.lb x,g3d3qmkv)j wave in the string is v. What will be the speed of a wave in the string if the length is u3mx ,+ dj9qbv3.)g3k loxu ueincreased to 2L, with no change in mass?
A. $0.5 \; v$
B. $0.71 \; v$
C. $1.4 \; v$
D. $2 \; v$
参考答案: C
本题详细解析:
暂无
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