本题目来源于试卷: Physics Unit12: Sound，类别为 通用国际物理
[单选题]
Two adjacent sources each emit a frequency of 800 Hzgz)x1 h)pn e8j in air where the velocity eg).)lxmuvsi5 s7hh 68 b9 dy/vmuc)rof sound is 340 m/s. How muchh)g dcsmy5. ) lu xem87vsuv)/9hr6bi farther back would source 1 have to be moved so an observer in front of the sources would hear no sound?
A. $0.123 \; m$
B. $0.321 \; m$
C. $0.213 \; m$
D. $0.312 \; m$
参考答案: C
本题详细解析:
暂无
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