# physics

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?

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1. 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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2. A soft drink bottle responate as air is blown across its is top.what happens to the resonant frequency as the level of fluid in the bottle decrease

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