Homework Help: Physics

Posted by SB on Monday, November 9, 2009 at 9:46pm.

What are the three longest wavelengths for standing sound waves in a 124-cm-long tube that is (a) open at both ends and (b) open at one end, closed at the other?
I did 340/(4*1.24)=68.54
3*340/(4*1.24)=205.64
but i am confused

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