Second highest frequency in a sound pipe

[Bolter]

Homework Statement

See below

Relevant Equations

Speed = frequency x wavelength

So here is my question

Have tried it and got these as my answers

Have I done part b) correctly over here to find the 2nd highest frequency?

Any help would be much appreciated! Thanks

 

[haruspex]

Homework Statement:: See below
Relevant Equations:: Speed = frequency x wavelength

So here is my question

View attachment 258637
View attachment 258638
Have tried it and got these as my answers

View attachment 258639

Have I done part b) correctly over here to find the 2nd highest frequency?

Any help would be much appreciated! Thanks

You were doing fine as far as 3c/(4L), but I don't understand the numbers you plugged in for c and L.

By the way, what you have (almost) calculated is the second lowest frequency, which is what the question should have asked for. There is no highest frequency.

 

[Bolter]

You were doing fine as far as 3c/(4L), but I don't understand the numbers you plugged in for c and L.

By the way, what you have (almost) calculated is the second lowest frequency, which is what the question should have asked for. There is no highest frequency.

Ah yes I see why the question should’ve meant second lowest frequency and not second highest

For the c and L values I have plugged in, these are just the speed of sound (which is 340 m/s) and length of the sound sound pipe in mm (I converted them back into meters to keep in SI units)

 

[haruspex]

For the c and L values I have plugged in, these are just the speed of sound (which is 340 m/s) and length of the sound sound pipe in mm (I converted them back into meters to keep in SI units)

Ah, sorry, I misread the question. I was looking at data in the first part.
Your answers are fine.

 

[Cutter Ketch]

Ah yes I see why the question should’ve meant second lowest frequency and not second highest

I completely agree what second highest should mean, but I can’t help point out the screwy confusions of how people actually use language. In the common vernacular people will sometimes say “second highest” when they mean “second in height”, so the “third highest rung on the ladder” is understood to be counted from the bottom. Very poor choice for a physics problem, but not unusual for English.

 

[haruspex]

“second highest” when they mean “second in height”

Hmm... I would use those interchangeably, both meaning second from the top.