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Chapter 13 Notes I

Chapter 13 Notes I. Review. • Definition: maximum displacement from the equilibrium position • How is wavelength related to frequency? • What does  stand for? • Definition: material through which a wave travels • What two things does the period of a pendulum

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Chapter 13 Notes I

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  1. Chapter 13 Notes I

  2. Review • Definition: maximum displacement from the equilibrium position • How is wavelength related to frequency? • What does  stand for? • Definition: material through which a wave travels •What two things does the period of a pendulum depend on?

  3. Review •Definition: Number of waves per second • Definition: wave that travels parallel to the particles of the medium • What is the “wave equation”? • Definition: unit to measure frequency • Definition: time for one vibration

  4. Like ALL waves, sound is caused by a vibration Demo – tuning fork in water music box – more vibration, more sound

  5. LONGITUDINAL * Sound is a ________________ wave compression rarefaction

  6. l

  7. medium * Sound needs a ________________ (sound can not travel in a vacuum)

  8. Remember..... The speed of a wave just depends on its ___________ medium

  9. * At room temperature sound travels _______ 343 m/s 300,000,000 m/s * Light travels ________________ You SEE lightning before You HEAR thunder

  10. WARM * Sound travels faster in _________ air than _________ air COLD

  11. SOLIDS * Sound travels fastest in ___________, slower in ______________ , and slowest in ____________ LIQUIDS GASES

  12. The perceived highness or lowness of a sound, depending on the frequency of the sound wave PITCH - high pitch high frequency low pitch low frequency

  13. Which is the high note?

  14. v = l f = 343 m/s Small l Big f High note Big l Small f Low note

  15. the apparent change in frequency due to the motion of the wave source Doppler Effect - http://www.lon-capa.org/~mmp/applist/doppler/d.htm Doppler Football

  16. Vsource Vsource < Vwave = 0

  17. Vsource Vsource > Vwave = Vwave

  18. HIGH FREQUENCY TOWARD C LOW FREQUENCY AWAY C

  19. REVIEW Three waves pass every second. If the wave speed is 150 m/s, what is the wavelength?

  20. REVIEW What is the velocity of this wave if it takes 1/2 s for each wave to pass? 12 meters

  21. REVIEW Standing waves are formed on a 18 m rope. What is the  when there is one segment? 3 segments? 4 segments? 6 segments?

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