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A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium.

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A wave vibrating in the direction of propagation.

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a wave vibrating at right angles to the direction of its propagation.

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The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium

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The distance light can travel in a unit of time through a given substance.

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one of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity and that include radio waves,

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:the entire range of wavelengths or frequencies of electromagnetic radiation extending from gamma rays to the longest radio waves and including visible light.

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the rate at which something occurs or is repeated over a particular period of time or in a given sample.

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the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.

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the maximum extent of a vibration or oscillation, measured from the position of equilibrium.