34. The speed of sound in a stationary air is 340 m/s. A police car with its 300-Hz siren turned on is moving toward a wall at 180 km/hour. The frequency of the reflected wave that the driver of the car hear is:
(A) 403 Hz
(B) 223 Hz
(C) 344 Hz
(D) 351 Hz
(E) none of the above.

答案:登入後查看
統計: 尚無統計資料

詳解 (共 1 筆)

#7534248
考題觀念 本題在考都卜勒效應(Doppl...
(共 1163 字,隱藏中)
前往觀看
0
0