本题目来源于试卷: gc textbook chapter 12 Sound，类别为 IB物理学
[问答题]
A highway overpass was observed to resona0aa+k d7lhqz0te arkuf- x4l r*m:-v 2qyxs one full loop ($\frac{1}{2}\lambda$) when a small earthquake shook the ground vertically at 4.0 Hz. The highway department put a support at the center of the overpass, anchoring it to the ground as shown in Fig. 12–36. What resonant frequency would you now expect for the overpass? Earthquakes rarely do significant shaking above 5 or 6 Hz. Did the modifications do any good?
参考答案: 
本题详细解析:
暂无
| 
