You are standing at \(x=0 \mathrm{~m}\), listening to seven identical sound sources described by Figure Q15.18. At \(t=0 \mathrm{~s}\), all seven are at \(x=343 \mathrm{~m}\) and moving as shown below. The sound from all seven will reach your ear at \(t=1 \mathrm{~s}\). Rank in order, from highest to lowest, the seven frequencies \(f_{1}\) to \(f_{7}\) that you hear at \(t=1 \mathrm{~s}\). Explain.

Figure Q15.18

Transcribed Image Text:

150 m/s, speeding up 250 m/s, steady speed 350 m/s, slowing down At rest 4 50 m/s. speeding up 5 50 m/s, steady speed 6 50 m/s, slowing down 7