Figure 14.1
The figure shows a wave.
-If L₂ = 65.5 cm, which note from Table 14.1 is represented in Fig. 14.1? Assume that the speed of sound is 343 m/s.

Question

Figure 14.1 The figure shows a wave. -If L₂ = 65.5 cm, which note from Table 14.1 is represented in Fig. 14.1? Assume that the speed of sound is 343 m/s. A)G3 B)C4 C)G4 D)C5

Quizplus · Accepted Answer

The given code L₂ represents a specific length in centimeters, which is 65.5 cm. To find out which musical note it corresponds to, we need to convert this length into a frequency using the speed of sound and the formula for the fundamental frequency of a tube open at both ends: $f = \frac{v}{2L}$, where $v$ is the speed of sound (343 m/s) and $L$ is the length of the tube in meters. Converting 65.5 cm to meters gives 0.655 m. Plugging the values into the formula gives $f = \frac{343}{2 \times 0.655} \approx 261.83 \, \text{Hz}$, which is the frequency of middle C (C4).

Figure 14.1 ​

Figure 14.1