gc textbook chapter 12 Sound (id: 9ee4dbfea)

本题目来源于试卷: gc textbook chapter 12 Sound，类别为 通用国际物理

[填空题]
How fast is an object moving on land if its speedz* h* qjmg;cwowf..0(u vljc3 a.lnvc4f )0d ext 20 $^{\circ} $C is Mach 0.33?    m/s
(b) A high-flying jet cruising at 3000 km/h displays a Mach number of 3.2 on a screen. What is the speed of sound at that altitude?    m/s

参考答案:
空格1: 110±2%  空格2: 260±2% 


本题详细解析:

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