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(II) In one of the original Doppler experiments, a tuba was played on a moving flat train car at a frequency of 75 $\mathrm{Hz}$ , and a second identical tuba played the same tone while at rest in the railway station. Whatin the station if the train car approached the station at a speed of 12.0 $\mathrm{m} / \mathrm{s} ?$ beat frequency was heard
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Physics 101 Mechanics
Chapter 16
Sound
Periodic Motion
Mechanical Waves
Sound and Hearing
Cornell University
Rutgers, The State University of New Jersey
University of Michigan - Ann Arbor
University of Sheffield
Lectures
08:15
In physics, sound is a vibration that typically propagates as an audible wave of pressure, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain. Humans can only hear sound waves as distinct pitches when the frequency lies between about 20 Hz and 20 kHz. Sound above 20 kHz is known as ultrasound and has different physical properties from sound below 20 kHz. Sound waves below 20 Hz are called infrasound. Different species have different hearing ranges. In terms of frequency, the range of ultrasound, infrasound and other upper limits is called the ultrasound.
04:49
In physics, a traveling wave is a wave that propogates without a constant shape, but rather one that changes shape as it moves. In other words, its shape changes as a function of time.
02:30
(II) In one of the origina…
01:42
In one of the original Dop…
02:21
03:10
Early Doppler shift experi…
05:24
A classic example of the D…
00:59
In the previous problem, s…
02:09
Two trains on separate tra…
04:36
Review. Two train whistles…
04:48
Two train whistles have id…
02:23
04:15
A car drives at a speed of…
02:14
especially observer would observer frequency from the moving Toba will be frequency. Observe. So I will write if nod or the fool Oh is equal to the frequency off a source forth or one minus the speed off the source source or, um, speed off the sound So speed of sound will be only one s and that is equal to by plugging the values 75 is there frequency off the source or one minus? The speed off the source is 12 meters per second 12 or the speed off the sound which is 3 43 by doing a simple maths. Then the frequency observe we get here is 78 hearts to India enters. Then we can find a beat so beat frequency will be beat. Frequency will be 78 minus. So when do you get minus 75 75 this gives us a frequency of three hearts so a beat frequency will be three hearts End off the problem. Thank you for watching
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