Final answer:
In this question, we are dealing with the concept of harmonics and frequencies of sound waves. The fundamental frequency is the lowest-frequency resonance of a sound wave. The frequency of the second harmonic is double the fundamental frequency.
Step-by-step explanation:
In this question, we are dealing with the concept of harmonics and frequencies of sound waves. Harmonics refer to the different frequencies that are integer multiples of the fundamental frequency.
The fundamental frequency is the lowest-frequency resonance of a sound wave. In this case, the tube is open at both ends, so its fundamental frequency is determined by the length of the tube. To find the fundamental frequency, we can use the formula:
f = v / λ
where f represents frequency, v represents the speed of sound, and λ represents the wavelength.
The second harmonic is the frequency that is double the fundamental frequency. So, we can find the frequency of the second harmonic by multiplying the fundamental frequency by 2.
To summarize, the fundamental frequency of the 0.672-m-long tube is calculated by using the formula f = v / λ, where v is the speed of sound and λ is the wavelength. The frequency of the second harmonic is double the fundamental frequency.