A pipe $30 cm$ long is open at both ends. Which harmonic mode of the pipe is resonantly excited by a $1.1 kHz$ source ? (Take speed of sound in air =$ 330 ms^{-1}$)
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(a) Fundamental frequency of open pipe
${n_1} = \frac{v}{{2l}} = \frac{{330}}{{2 \times 0.3}} = 550 Hz$
First harmonic = $2 \times {n_1} = 1100Hz$. = $1.1\,\,kHz$
${n_1} = \frac{v}{{2l}} = \frac{{330}}{{2 \times 0.3}} = 550 Hz$
First harmonic = $2 \times {n_1} = 1100Hz$. = $1.1\,\,kHz$
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