A railroad train is traveling at 32 m/s in still air. The frequency of the train whistle is 350 Hz. What is the wavelength of the sound and

Question

A railroad train is traveling at 32 m/s in still air. The frequency of the train whistle is 350 Hz. What is the wavelength of the sound and the frequency of the sound heard by the listener in front of the locomotive? (1 point)

in progress 0
Orla Orla 1 month 2021-08-15T21:29:54+00:00 1 Answers 2 views 0

Answers ( )

    0
    2021-08-15T21:31:39+00:00

    Answer:

    0.9 m,386.36 Hz

    Explanation:

    We are given that

    Speed of train,vs=32 m/s

    Frequency of whistle,f0=350 Hz

    We have to find the wavelength of sound and the frequency of heard by the listener in front of the locomotive.

    Speed of sound=v=340 m/s

    We know that the frequency of listener

    f=f_0(\frac{v}{v-v_s})

    Using the formula

    f=350\times(\frac{340}{340-32})

    f=386.36 Hz

    Wavelength,\lambda=\frac{v}{f}

    Using the formula

    \lambda=\frac{340}{386.36}=0.9 m

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )