Physics Unit12: Sound (id: f1250af90)

本题目来源于试卷: Physics Unit12: Sound，类别为 国际高中通用物理

[单选题]
If a jet plane were to double its MACH-speed, its nvjh1t,;mg 6-1orgi i half-ar/18yxa b*nqfngle will decrease by a factor q /*yb8anxf1r of:

A. 1/2
B. 2
C. $\sin^{-1} (1/2)$
D. none of the above


参考答案:  D


本题详细解析: 暂无

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