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 andn*4 stg j(gc):(lgjl q length L is under tension T. Th(g6 ly*.(wamw0j ik q ,rl/rxj 9opyhk2*d .oie speed of a wave in the string is v.y/. rj*j(h l * k6y moilq ak,(pig.drw2w9xo0 What will be the speed of a wave in the string if the mass of the string is increased to 2m, with no change in length?
A. $0.5 \; v$
B. $0.71 \; v$
C. $1.4 \; v$
D. $2 \; v$
参考答案: B
本题详细解析:
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