Progressive waves
 

Progressive waves problem 5


A speaker vibrates at a frequency of 680 Hz and emits a sound wave. The figure shows the compressions and rarefactions of the air and the displacement of the air particles from the equilibrium position as a function of the distance from the speaker in zero seconds.




What is the displacement of the particles from the equilibrium position in 1 ms at a distance of 1.3 m from the speaker? The velocity of the wave in the air is 340 , and the amplitude from the equilibrium position is 10 nm.


 

material editor: Gabriel Amakhabi