One of the harmonic frequencies of tube \( A \) with two open ends is \( 400 \mathrm{~Hz} \). Th...

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One of the harmonic frequencies of tube \( A \) with two open ends is \( 400 \mathrm{~Hz} \). The next-highest harmonic frequency is \( 480 \mathrm{~Hz} \). (a) What harmonic frequency is next highest after the harmonic frequency \( 160 \mathrm{~Hz} \) ? (b) What is the number of this next-highest harmonic? One of the harmonic frequencies of tube \( B \) with only one open end is \( 1080 \mathrm{~Hz} \). The next-highest harmonic frequency is \( 1320 \mathrm{~Hz} \). (c) What harmonic frequency is next highest after the harmonic frequency \( 600 \mathrm{~Hz} \) ? (d) What is the number of this next-highest harmonic?
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