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Vibration: A repeated back-and-forth or up-and-down motion. Energy: The ability to do work.

Vibration: A repeated back-and-forth or up-and-down motion. Energy: The ability to do work. Wave:. A disturbance that travels through a medium from one location to another.

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Vibration: A repeated back-and-forth or up-and-down motion. Energy: The ability to do work.

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  1. Vibration: • A repeated back-and-forth or up-and-down motion. • Energy: • The ability to do work.

  2. Wave: • A disturbance that travels through a medium from one location to another.

  3. Mechanical Waves:Waves that require a medium through which to travel.Examples: sound waves, ocean waves, seismic waves.Medium (medium- singular/ media- plural): The material through which a wave travels.Three types of media waves can travel through: Solids, Liquids, Gases.

  4. Electromagnetic Waves:Waves that do not require a medium for travel (can travel through a medium or a vacuum). Examples: light, heat, x-rays, microwaves, radio waves, infrared waves.

  5. Longitudinal Waves:Waves that move from left to right---parallel to the wave energy.Transverse Waves:Waves that move up and down– perpendicular to the wave energy.

  6. Properties of a Wave

  7. Properties of a Wave:Transverse vs. Longitudinal

  8. Crest: • Highest point of a wave. • Trough: • Lowest point of a wave.

  9. Amplitude: • Maximum distance a wave varies from its rest position (height of a wave). • Wavelength: • The distance from two corresponding (or the same) parts of a wave (crest to crest or trough to trough).

  10. Compression: • The part of a longitudinal wave where the particles of the medium are close together. • Rarefaction: • The part of a longitudinal wave where the particles of the medium are farther apart.

  11. Frequency: • How many waves can pass a given point per second, measured in Hertz (Hz).

  12. Wave Speed • We can use what we know to determine how fast a wave is moving. • What is the formula for velocity? • velocity = distance / time • v =  / T • v = f  • velocity = frequency * wavelength • This is known as the wave equation.

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