(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 40-cm-long tube has a 40-cm-long insert that can be pulled in and out. A vibrating tuning fork is held next to the tube. As the insert is slowly pulled out, the sound from the tuning fork creates standing waves in the tube when the total length L is 42.5 cm, 56.7 cm, and 70.9 cm.

2. Relevant equations

The wavelength= 2L/m where m=1,2,3,4...

frequency: mv/2L where m=1,2,3,4

3. The attempt at a solution

This is an open ended-opened tube. Since I know the values of L, I can find the wavelengths (but I still don't know m). The frequency of the tuning fork would not change, but I am confused about what to do next. How do I approach this question? Thank you for all the help.

<< spam links deleted by berkeman >>

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Frequency of a Tuning Fork

**Physics Forums | Science Articles, Homework Help, Discussion**