Physics Unit12: Sound (id: d0f451801)

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

[单选题]
The intensity of a point source at a distanczfu :,/aueg. ae d from the source is I. 3tdt hcmycget 3*y 8p d0g(63qWhat is the int6p tg3(c3 ydh3y0ct8getqd * mensity at a distance 2d from the source?

A. $4 \; I$
B. $2 \; I$
C. $I/2$
D. $I/4$


参考答案:  D


本题详细解析: 暂无

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