Fundamental Frequency of Open and Closed Tube

[veronicak5678]

Homework Statement

A tube closed at one end and open at the other has a fundamental frequency of 242 Hz. What is the fundamental whenboth are open?

Homework Equations

f (open and closed) = v/4L
f (open) = v/2L
v sound = 343 m/s

The Attempt at a Solution

f1 (open and closed) = v/4L = 242Hz = 343/4L

L = .354 m

f (open) = v /2L = 343/ 2(.354m) = 484 Hz

Does this look OK?

 

[Doc Al]

Looks good.

 

[veronicak5678]

Great. Thanks for looking!