Waves And Sound Question 4
Question 4 - 25 January - Shift 2
A train blowing a whistle of frequency $320 Hz$ approaches an observer standing on the platform at a speed of $66 m / s$. The frequency observed by the observer will be (given speed of sound $=330 ms^{-1}$ ) $Hz$.
Show Answer
Answer: (400)
Solution:
Formula: Doppler Effect for Sound
nan
$\because{ }^{N}$
$f _{\text{app }}=f(\frac{v}{v-v_s})$
$=320(\frac{330}{330-66})$
$=400 Hz$
