## College Physics (4th Edition)

A pipe that is closed at one end can only produce odd harmonics. That is, the pipe can produce $f_1, ~3f_1, ~5f_1, ~7f_1,~9f_1,~etc...$ If $f_1 = 50~Hz$, then the three lowest frequencies are $50~Hz, 150~Hz,$ and $250~Hz$. The system could be: (b) a tube of air open at one end