12_InstSolManual_PDF_Part23 - (b The stick has the same...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
The source is moving away and the frequency is lowered. (b) The water serves as a listener (Figure 12.78b). The source and listener are approaching and the frequency is raised. Both the person and the water are at rest so there is no Doppler effect when the water serves as a source and the per- son is the listener. The person detects sound with frequency 2920 Hz and wavelength 0.118 m. (c) 12.79. Set Up: Apply to the sound from each wire to find expressions for and the frequencies of the sounds from wires A and B as detected by the bee. Solve: wire A (Figure 12.79a) Figure 12.79 wire B (Figure 12.79b) so and Reflect: because the bee is flying toward A and because the bee is flying away from B . 12.80. Set Up: Compare the stick to a vibrating air column, for which we know the standing wave wavelengths. Solve: (a) The ends are free to move and are displacement antinodes.
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: (b) The stick has the same nodal structure as an open pipe. 2, The wavelength of the first five harmonics are: and l 5 5 1.20 m. l 4 5 1.50 m l 3 5 2.00 m, l 2 5 3.00 m, l 1 5 6.00 m, 3, c . n 5 1, l n 5 2 L n 5 6.00 m n , f LB , f S f LA . f S f S 5 320 Hz 1.0233 f S 2 0.9767 f S 5 15 Hz f LA 2 f LB 5 15 Hz f LB 5 1 v 2 8.0 m / s v 2 f S 5 0.9767 f S ( a ) A v 5 S f S ( b ) B S f S 1 1 L 8.0m / s f LA L 8.0m / s f LB f LA 5 1 v 1 8.0 m / s v 2 f S 5 1.0233 f S v 5 344 m / s. f LA 2 f LB 5 15 Hz. f LB , f LA f L 5 1 v 1 v L v 1 v S 2 f S f beat 5 f 1 2 f 2 5 2920 Hz 2 2186 Hz 5 734 Hz l L 5 v f L 5 0.118 m f L 5 1 v v 2 49.5 m / s 2 f S 5 2920 Hz l L 5 v f L 5 344 m / s 2186 Hz 5 0.157 m. Mechanical Waves and Sound 12-23...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern