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]
A police car has an 800-Hz siwhoif(y7j:o ; ren.aheg, :r0p4 ny It is 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 standing along the roadside. What change of frequen ya,p4g enr0h:cy 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
| 
