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Tuning Fork Frequency?

A vertical tube is placed in water such that one of its ends is considered closed. A tuning fork vibrates above the opening such that the tube resonates. The tube is raised 32 cm and another resonance is found. Assume the speed of sound in air is 343 m/s.

Draw a diagram of the tubes assuming the first resonance was the first harmonic and the second resonance was the second harmonic. Be sure to include a sketch of what the harmonics look like within the tube. Include all given variables in the diagram.

Calculate the frequency of the tuning fork.

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