本题目来源于试卷: Physics Unit12: Sound，类别为 通用国际物理
[单选题]
A police car has an 800-Hz sipxe(kq p w2 yyo)0oe6a. qsghv4jy,8 0ren. It i 8zax*ovg6)a ws traveling at 35 m/s on a day when the speed of sound through air is 340 m/s. The car approaches and passes an observer who is standingwa)6x8 aoz*gv along the roadside. What change of frequency does the observer hear?
A. zero
B. $82 \; HZ$
C. $166 \; Hz$
D. $249 \; Hz$
参考答案: C
本题详细解析:
暂无
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