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A piece of music is written so that the first note is 220 Hz and the last note is 880 Hz. (Use 343 m/s as the speed of sound, and 1.20 kg/m as the density of air.) (a) Find the wavelength of the first note (in m). 1.56 (b) Find the wavelength of the last note (in m). 0.39 (c) Assume the choir sings the melody with a uniform sound level of 80.0 dB. Find the pressure amplitude of the first note (in Pa). 0.148 Apply the definition of sound level and solve for 1, then use the relationship between pressure amplitude and intensity to find AP Pa max (d) Assume the choir sings the melody with a uniform sound level of 80.0 dB. Find the pressure amplitude of the last note (in Pa). 0.148 Apply the definition of sound level and solve for 1, then use the relationship between pressure amplitude and intensity to find AP max" Pa (e) Find the displacement amplitude of the first note (in m). 2.6e-7 Use the relationship between the intensity and the displacement amplitude, and the frequency of the note, and solve for smax () Find the displacement amplitude of the last note (in m). m

A piece of music is written so that the first note is 220 Hz and the last note is 880 Hz. (Use 343 m/s as the speed of sound, and 1.20 kg/m as the density of air.) (a) Find the wavelength of the first note (in m). 1.56 (b) Find the wavelength of the last note (in m). 0.39 (c) Assume the choir sings the melody with a uniform sound level of 80.0 dB. Find the pressure amplitude of the first note (in Pa). 0.148 Apply the definition of sound level and solve for 1, then use the relationship between pressure amplitude and intensity to find AP Pa max (d) Assume the choir sings the melody with a uniform sound level of 80.0 dB. Find the pressure amplitude of the last note (in Pa). 0.148 Apply the definition of sound level and solve for 1, then use the relationship between pressure amplitude and intensity to find AP max" Pa (e) Find the displacement amplitude of the first note (in m). 2.6e-7 Use the relationship between the intensity and the displacement amplitude, and the frequency of the note, and solve for smax () Find the displacement amplitude of the last note (in m). m

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A piece of music is written so that the first note is 220 Hz and the last note is 880 Hz. (Use 343 m/s as the speed of sound, and 1.20 kg/m as the density of air.) (a) Find the wavelength of the first note (in m). 1.56 m (b) Find the wavelength of the last note (in m). 0.39 (c) Assume the choir sings the melody with a uniform sound level of 80.0 dB. Find the pressure amplitude of the first note (in Pa). 0.148 Apply the definition of sound level and solve for 1, then use the relationship between pressure amplitude and intensity to find AP max Pa (d) Assume the choir sings the melody with a uniform sound level of 80.0 dB. Find the pressure amplitude of the last note (in Pa). 0.148 Apply the definition of sound level and solve for I, then use the relationship between pressure amplitude and intensity to find AP max Pa (e) Find the displacement amplitude of the first note (in m). 2.6e-7 Use the relationship between the intensity and the displacement amplitude, and the frequency of the note, and solve for smax (r) Find the displacement amplitude of the last note (in m). m
Transcribed Image Text:A piece of music is written so that the first note is 220 Hz and the last note is 880 Hz. (Use 343 m/s as the speed of sound, and 1.20 kg/m as the density of air.) (a) Find the wavelength of the first note (in m). 1.56 m (b) Find the wavelength of the last note (in m). 0.39 (c) Assume the choir sings the melody with a uniform sound level of 80.0 dB. Find the pressure amplitude of the first note (in Pa). 0.148 Apply the definition of sound level and solve for 1, then use the relationship between pressure amplitude and intensity to find AP max Pa (d) Assume the choir sings the melody with a uniform sound level of 80.0 dB. Find the pressure amplitude of the last note (in Pa). 0.148 Apply the definition of sound level and solve for I, then use the relationship between pressure amplitude and intensity to find AP max Pa (e) Find the displacement amplitude of the first note (in m). 2.6e-7 Use the relationship between the intensity and the displacement amplitude, and the frequency of the note, and solve for smax (r) Find the displacement amplitude of the last note (in m). m
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