?The lowest part of the wave is called the, trough, crest, frequency, ........in a longitudinal wave, the particles move, at a 90 degree angle, up and down, back and forth, Which is an example of a longitudinal wave?, sound wave, radio wave, visible wave, What kind of wave is pictured below?, compressional wave, transverse wave, sound wave, is a repeated disturbance caused by vibrations that carry energy from place to place...., Matter, Energy, Wave, What is represented by the letter 'x'?, Crest, Compression, Rarefaction

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