Physics Unit12: Sound (id: d0f451801)

本题目来源于试卷: Physics Unit12: Sound，类别为 国际高中通用物理

[单选题]
The intensity of a point somp cx-mdf,ha6 wq8 t5*urce aq/bs:5de 9g7n 4wihh at a distance d from the source is I. What is the intensity at a distance 2d fwbd5aqh:/ie49 7h ns grom 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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