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What have we learned in current units?, IMG_3423 - Coggle Diagram

- - - - Wave speed is the distance a wave travels per unit of time.
      - Fomula: Wave speed (v) + frequency (f) x wavelength (λ)
    - - Oscillation: repeating movement of particles.
      - Frequency: Number of waves per second.
      - Wavelength: The distance from a point on one wave to the same point on the next wave.
      - Amplitude: The distance between the wave’s resting position and the furthest point from it.
  - - - Large amplitude = louder sound
        Small amplitude = quieter sound
    - - High frequency and short wavelength = high pitch
        Low frequency and long wavelength = low pitch
    - - Humans hear between 20Hz and 20,000Hz.
        
        Ultrasound: Above 20,000Hz, too high for humans. Used by bats for ecolocation and in medical imaging.
        
        Infrasound: Below 20Hz, too low for humans. Elephants use it for long distance.