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Sound
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Sound
Echo: an echo is a reflection of sound from a boundary/ barrier.
Equation: S=A/t.
Ultrasound: a sound wave with a frequency higher than 20,000Hz.
Uses: Scanning unborn babies/internal organs, detecting cracks in metal casing.
SONAR: sound, navigation and ranging - sound wave.
RADAR: radio detection and ranging - electromagnetic (radio) wave.
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- GCSE Physics Note on Sound, created by John Carroll on 23/12/2021.
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- John Carroll
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