A Vibrating Tuning Fork Is Held Above a Tube Filled

question 16

Multiple Choice

A vibrating tuning fork is held above a tube filled with water. The first two resonances occur when the water level is lowered by 14.2 cm and 44.2 cm from the top of the tube. If there is a small end correction that adds a small extra length L to the effective length of the air column, calculate the frequency of the tuning fork. Assume the speed of sound to be 330 m/s.

• A) 560 Hz
• B) 581 Hz
• C) 550 Hz
• D) 1100 Hz
• E) 1120 Hz

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