Determining the velocity of sound in the air by the resonance method

[mjdom]

Homework Statement

measure the velocity of sound in the air using tuning fork and a pipe closed at one end

method a: End Correction involves applying a correction factor to the first resonant length based on the diameter of the tube used.

method b: Second Resonant Length involves finding two successive resonant lengths of the air column within the pipe. The distance between these points represents half a wavelength of the resonance frequency.

equipment - two lengths of PVC tubing of 30mm and 50mm diameter

Homework Equations

Le= L + 0.29d
wavelength of the sound = 2x (L2-L1)

The Attempt at a Solution

questions i want to ask,,

- list the main source of measurement uncertainty
- what frequencies of tuning forks is more suitable
- predict third resonance length for each tuning fork used in method b
- what value you would expect in substracting the second resonant length from thr third resonant length?
- expain why the end correction factor is not applied in the second part of the investigation
- reason for measuring air temperature inside the pipe[/B]

 

[mjdom]

diameter of tubes 50mm - first resonant length L (m) : 0.304 / effective length Le (m) : 0.318 / wavelength 4 x Le (m): 1.274 / velocity : 326.14

diameter of tubes 30mm - first resonant length L (m) : 0.33 / effective length Le (m) : 0.338 / wavelength 4 x Le (m): 1.354 / velocity : 346.14

fork 1 frequency : 256

i havnt got result for method 2...

 

[gneill]

Questions are not attempts at solutions. What are your thoughts on each of your questions? You need to show some effort before help can be given.

 

[mjdom]

Questions are not attempts at solutions. What are your thoughts on each of your questions? You need to show some effort before help can be given.

i know but to be honest i have no idea about this experiment.. can u give some examples? so i can get some idea