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A soft-drink bottle resonates as air is blown across its top. what happens to the resonant frequency as the level of fluid in the bottle decreases?

  • physics -

    Consider the level of fluid in the bottle to be adjusted so that the air column above it
    resonates at the first harmonic. This is given by f v 4L . This equation indicates that as the length L

    of the column increases (fluid level decreases), the resonant frequency decreases.

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