00:01
According to doppler effect, the frequency shifts due to the motion of the object.
00:06
In this problem, we're given with a sound source that emits sound with a frequency of 600 hz.
00:12
It moves away from a stationary source so that the beat frequency, that means the difference between the frequency that is emitted by the sound source and that heard by the listener is 6 hertz.
00:25
Taking that the speed of sound in air is 340 meters per second, we want to find how fast the source of the sound is moving away from the listener.
00:35
So notice here that we're also given with the doppler effect equation and that the convention for the speeds of the listener and the source, depending on their relative motion.
00:47
So we will explain this convention, specifically, as we use them in our problem right here.
00:56
As the listener is stationary, so you see here that we set vl to be equal to zero...