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A 105 cm long closed air column has two successive, adjacent resonance frequencies of 85 Hz and 119 Hz. (a) What is its fundamental

A 105 cm long closed air column has two successive, adjacent resonance frequencies of 85 Hz and 119 Hz. (a) What is its fundamental frequency? (b) What is the length of a segment at the 85 Hz resonance? (c) What is the speed of the waves in the air column?

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