On loading the prong of a tuning form with wax its frequency____________________?
Correct answer: B. decreases
- A. increases
- B. decreases
- C. remains unchanged
- D. may increase or decrease
Explanation
Adding wax to a tuning-fork prong increases its effective mass while its stiffness is nearly unchanged. Since frequency is proportional to the square root of stiffness divided by mass, the increased mass lowers the frequency. The likely mistake is choosing increases by thinking that adding material makes the prong stronger without considering the dominant mass effect.
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About Organ Pipes
Organ pipes produce standing sound waves in air columns, with resonance determined by whether each end is open or closed. The topic covers nodes, antinodes, fundamental frequency, harmonics, wavelength and end correction. Open pipes support all harmonics, while closed pipes support only odd harmonics under the ideal model.
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