- #1
dals2002
- 12
- 0
[SOLVED] Standing Sound Waves
What are the three longest wavelengths for standing sound waves in a 121 cm long tube that is (a) open at both ends and (b) open at one end, closed at the other?
the wavelength equation that i used for open-open was [tex]\lambda[/tex]= 2L/m; where m is the number of modes (m=1,2,3,4...)
and then for open-closed [tex]\lambda[/tex]= 4L/m; where m is the number of modes (m=1,3,5,7...)
so i have the length, but the one question that i have about this problem is could i start with the lowest number of modes, but if that is true then why ask for the three longest wavelength, so i am kind of lost if anyone could give me a clue on what to do
thanks in advance
What are the three longest wavelengths for standing sound waves in a 121 cm long tube that is (a) open at both ends and (b) open at one end, closed at the other?
the wavelength equation that i used for open-open was [tex]\lambda[/tex]= 2L/m; where m is the number of modes (m=1,2,3,4...)
and then for open-closed [tex]\lambda[/tex]= 4L/m; where m is the number of modes (m=1,3,5,7...)
so i have the length, but the one question that i have about this problem is could i start with the lowest number of modes, but if that is true then why ask for the three longest wavelength, so i am kind of lost if anyone could give me a clue on what to do
thanks in advance