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Chapter 14-1 Waves

Chapter 14-1 Waves. Types of Waves. Waves:. A repeating disturbance in a solid liquid or gas. Waves and Matter. Waves don’t carry the water along with them. Only the energy carried by the waves moves forward. Waves - Carry energy without transporting matter. Mechanical Waves.

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Chapter 14-1 Waves

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  1. Chapter 14-1Waves Types of Waves

  2. Waves: • A repeating disturbance in a solid liquid or gas

  3. Waves and Matter • Waves don’t carry the water along with them. • Only the energy carried by the waves moves forward. • Waves - Carry energy without transporting matter

  4. Mechanical Waves • Mechanical Waves – Require a medium (Solid, liquid, and gas)

  5. Electromagnetic Waves • Electromagnetic Waves • – Light Waves • – Do not require a medium

  6. Types of Waves: • Transverse Waves – Particles of the medium move perpendicular to the direction the wave is moving • Up and down • Light Waves

  7. Longitudinal Waves • Waves where the particles of the medium vibrate parallel to the direction the wave is traveling. • Slinky • Sound Waves

  8. Sound Waves • Sound waves are longitudinal waves. • Travel in a spherical motion • Can travel through a medium

  9. Seismic Waves • The breaking crust vibrates, creating seismic waves that carry energy outward.

  10. Seismic Waves • Seismic Waves – transverse and longitudinal

  11. Surface Waves: • Water Waves • Occur at the boundary between two mediums • Move both parallel and perpendicular • Particles move in a circle

  12. Characteristics of Waves: • Sine Curves – Transverse Waves • Looks like an “S” laying on its side

  13. Parts of a Wave: • Crest – Top of a wave • Trough – Bottom of Wave • Amplitude – Height of Wave • Wavelength – Length of the wave – Crest to Crest or Trough to Trough • Symbol = λ (Greek letter lambda)

  14. Parts of a Wave: • Compression – Longitudinal Wave – Particles are crunched together • Rarefactions – Longitudinal Waves – Particles are spread out

  15. Parts of a Wave: • Frequency – The number of cycles or vibrations per unit of time. • Symbol = f • Measured in Hertz (Hz) • Frequency = _1__ Period

  16. Wave Speed: • Speed = Distance ÷ Time • Wave Speed = Wavelength ÷ Period • Wave Speed = Frequency x Wavelength • V = λ ÷ T • V = f x λ

  17. Wave Speed: • Wave speed depends on the medium • Waves travel faster in solids • Waves are the slowest in gasses

  18. Vibrations and Waves: • Simple Harmonic Motion – Wave or vibration continues to move up and down • Damped Harmonic Motion – Wave or vibration fades out as energy is transferred from one object to another.

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