Physics Unit12: Sound (id: f1250af90)

本题目来源于试卷: Physics Unit12: Sound，类别为 通用国际物理

[单选题]
If a jet plane were to double its MACtl*g;( h3mc xgH-speed, its half-angle will decre wekzcg2yfd3q 8vo4dt, n* vfa 8rk1:bz z,+:jase by a fntdgv,jkdfvak +:z y c8bo8 4f1z,2 wq3z *:eractor 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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