問題詳情
13. The speed of a transverse wave on a string is 170 m/s when the string tension is 120 N. To what
value must the tension be changed to raise the wave speed to 180 m/s?
(A) 120 N
(B) 125 N
(C) 130 N
(D) 135 N
(E) 140 N
參考答案
答案：D
統計：A:0,B:0,C:0,D:1,E:0
難度：計算中