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 doum 4we .w/e3pbmka8m h 7ec46hwble its MACH-speeh pc3jiyk( hn1 8+hc6q9 (pnave *3msnd, its half-angle will decrease by a factor h nackhh i(j6 9n(n1m8 33ppcq +svey*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

微信扫一扫，分享更方便