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Trough | wave | Britannica
Crest and trough - Wikipedia
Trough - (Physical Science) - Vocab, Definition, Explanations
Physics Tutorial: The Anatomy of a Wave - The Physics Classroom
What does trough mean in physics? - Physics Network
Trough - Oxford Reference
Troughs - (College Physics I – Introduction) - Vocab, Definition ...
Trough - (AP Physics 2) - Vocab, Definition, Explanations - Fiveable
What is a peak and trough on a wave? - Physics Network
TROUGH Definition & Meaning - Dictionary.com
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