Question

5 which section on the wave shown above is associated with the volume of the sound being produced? (a) a section 2 b section1 c section 4 d section 3 (b) which of the following is the best prediction of what would happen if the distance across section 1 in the diagram were to decrease? a wavelength would decrease b amplitude would increase c frequency would decrease d energy would decrease

Explanation:

Step1: Recall sound - wave property related to volume

The volume of a sound is related to the amplitude of the sound - wave. Amplitude is the maximum displacement of the wave from its equilibrium position. In the given wave diagram, section 2 represents the amplitude.

Step2: Analyze the property of section 1

Section 1 represents the wavelength of the wave, which is the distance between two consecutive points in phase (e.g., two crests or two troughs). If the distance across section 1 (wavelength) decreases, according to the wave equation $v = f\lambda$ (where $v$ is the wave - speed, $f$ is the frequency, and $\lambda$ is the wavelength), and assuming the wave - speed $v$ is constant in a given medium, if $\lambda$ decreases, then the frequency $f$ increases. Also, the energy of a wave is related to its amplitude and frequency ($E\propto f$). An increase in frequency means an increase in energy.

Answer:

(a) A. Section 2
(b) A. Wavelength would decrease