Q 37 A car is moving along x-axis with velocity v = 20 m/s, it sounds a whistle of - Physics - Waves

Question

Q 37 A car is moving along x-axis with velocity v = 20 m/s, it
sounds a whistle of frequency 660 Hz If the speed of sound is 340
m/s, then the apparent frequency heard by the observer at the
instant shown in the diagram is

(1) 640 Hz
(2) 720 Hz
(3) 700 Hz
(4) 680 Hz

Decoder_2 · Accepted Answer

Dear
student,
<img alt="" src=
"https://s3mn%20mnimgs%20com/img/shared/content_ck_images/ck_5abdd8eb8f683%20png"
style="width: 154px; height: 165px;">

Regards

Q.37. A car is moving along x-axis with velocity v = 20 m/s, it sounds a whistle of frequency 660 Hz. If the speed of sound is 340 m/s, then the apparent frequency heard by the observer at the instant shown in the diagram is (1) 640 Hz (2) 720 Hz (3) 700 Hz (4) 680 Hz

Q.37. A car is moving along x-axis with velocity v = 20 m/s, it sounds a whistle of frequency 660 Hz. If the speed of sound is 340 m/s, then the apparent frequency heard by the observer at the instant shown in the diagram is

(1) 640 Hz
(2) 720 Hz
(3) 700 Hz
(4) 680 Hz