Wave Intensity and Decibel (id: 380181257)

本题目来源于试卷: Wave Intensity and Decibel，类别为 美国物理杯赛(Physics Bowl)

[单选题]
01.35: The intensity of 70l)tzj2 jbz1 o0m5h z 7jz wgdv1yq;nsound 10 m yxwn5;s.rs :beters from a tornado siren is a very loud 130 decibels. At what distance would;:. sr xw5nsyb you need to be for the intensity to drop to 90 decibels?

A. 14.3 m
B. 31.8 m
C. 210 m
D. 400 m
E. 1000 m


参考答案:  E


本题详细解析: 暂无

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