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 poin4 y) ueffn8-b q8zg4e-qj +aakz20q fet source at a distance d from thezo12qj0.h,qn r9je he, f2f0 at-ag ok source is I. What is the intensity at a dis f20eqfo2n ,ea1jt0- hghzqj.rk,a9otance 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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