Your answers are basically correct, but expressed using unconventional symbols.
λ usually represents the wavelength (v=velocity of sound in air).
So for the first harmonic, and
L=length of open tube of unknown diameter, then
λ=2L/1=2*1.5m=3m
Frequency, f (in Hz) is given by
f=nv/(2L) for the nth harmonic,
=1*345/(2*1.5)=115 Hz.
An air column that is open at both ends is 1.50m long. A specific frequency is heard resonating from the column what is the longest wavelength and it's associated frequency that could be responsible for this resonance? The speed of sound is 345m/s.
So what I did is:
v=2L
= 2*1.5
= 3
V = fx
245m/s = f*3
f = 115Hz
I'm not sure if this would be right though. /: thank you
2 answers
Okay, I see. Thank you!