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VIBRATIONS AND WAVES

VIBRATIONS AND WAVES. CHAPTER 25. VIBRATION Needs to exist; to WAVE Must extend from. VIBRATION OF A PENDULUM. Period Depends on the & the T = 2  ( Lg ) T = L = g = Long pendulum has than shorter pendulum Swings back and forth. WAVE DESCRIPTION.

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VIBRATIONS AND WAVES

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  1. VIBRATIONS AND WAVES CHAPTER 25

  2. VIBRATION • Needs to exist; to • WAVE • Must extend from

  3. VIBRATION OF A PENDULUM • Period • Depends on the & the • T = 2 (Lg) • T = • L = • g = • Long pendulum has than shorter pendulum • Swings back and forth

  4. WAVE DESCRIPTION • Simple harmonic motion • aka • back-and-forth • produces

  5. Parts of a Wave • Crests: • Troughs: • Amplitude: • Wavelength: • Frequency: • unit: Hertz =

  6. The source of all waves is • Given frequency, you can find the period • frequency = • period =

  7. WAVE MOTION • Energy is by a wave fromto a • There isbetween two points • e.g. string attached to a door, stone in a quiet pond, sound in a room • Energy from a to a receiver is carried by a • NOT byw/in the medium

  8. WAVE SPEED • wave speed = •  =  

  9. TRANSVERSE WAVES • motion of medium is @ • e.g. radio waves & light waves

  10. LONGITUDINAL WAVES • motion of medium is • e.g. sound waves

  11. INTERFERENCE • When wave patterns • Constructive = • Destructive = • Out of phase = regions where to produce amplitude of zero • In phase =

  12. STANDING WAVE • Wave created where • e.g. shaking a rope tied to a wall • Large amplitudes =

  13. Standing waves result • Waves of pass each other going

  14. DOPPLER EFFECT • Change in due to the of the • Greater the , greater the

  15. BOW WAVES • Wave crests produced and a is formed from these overlapping crests • Occurs when

  16. SHOCK WAVES • Produced by • Occurs when

  17. SONIC BOOM • When conical shell of behind a reaches listeners on the • Shock wave behind an aircraft • Can occur whenever any object (bullet, circus whip, towel)

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