A wave is a disturbance that transfers energy., Waves that must travel through a medium are called mechanical waves., Waves that can travel through empty space without a medium are electromagnetic., Compression waves are called longitudinal., Transverse waves or s-waves are slower than longitudinal waves., Waves with a higher amplitude are represented as being farther away from their rest position., Wave speed is calculated by dividing the wavelength by the wave period., Primary waves are faster and stronger than secondary waves., Seismic waves are earthquake waves.

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