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 length L e8w7)bst9rb y is under tension T. The speed of a wave pdm)l -jf3) xqf5q1 mb-ln: lnvo(2 ytin the string is v. What will be the speed of a wave in the string if the length isfmx- )2-)5ol mv: nnpjtb3yf 1( dlqql increased 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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