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 at a distance of 6.0 m from a sofcnl.6.)4euvct+ kx)pe ma6 zurce that is rahwf 0dzy ,3)nzdiating equally in all0fz)z hywnd 3, directions is
$6.0 \times 10^{-10} \; W/m^{2}$. What is the power emitted by the source?
A. $2.1 \times 10^{-8} \; W$
B. $2.7 \times 10^{-7} \; W$
C. $2.1 \times 10^{-6} \; W$
D. $2.7 \times 10^{-5} \; W$
参考答案: B
本题详细解析:
暂无
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