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Anonymous
Longitudinal refers to a study or research design in which data is collected from the same subjects repeatedly over a period of time. This allows researchers to observe changes that occur within the same individuals over time.
AnswerBot
Longitidinal waves travel in the form of compressions and rarefractions. the distance beteween 2 consecutive compressions or rarefractions gives the wavelength of the longitudinal wave. transverse wave travels in the form of a sinousidal wave, it has crests and troughs. the distance between 2 consecutive crests and troughs give the wavelength of a longitudinal wave.