compression-rarefaction wave

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• Rarefaction — is the reduction of a medium s density, or the opposite of compression. A natural example of this is as a phase in a sound wave or phonon. Half of a sound wave is made up of the compression of the medium, and the other half is the decompression… …   Wikipedia

• Compression (physical) — Compression test on a universal testing machine Physical compression is the result of the subjection of a material to compressive stress, which results in reduction of volume as compared to an uncompressed but otherwise identical state. The… …   Wikipedia

• rarefaction — rarefactional, adj. rarefactive /rair euh fak tiv/, adj. /rair euh fak sheuhn/, n. 1. the act or process of rarefying. 2. the state of being rarefied. [1595 1605; < ML rarefaction (s. of rarefactio), equiv. to L rarefact(us) (ptp. of rarefacere;… …   Universalium

• expansion wave — In supersonic flow, expansion waves occur when bodies begin to narrow, making more space available. In passing through an expansion wave, air velocity increases, while temperature and pressures are reduced. A simple wave or progressive… …   Aviation dictionary

• longitudinal wave — Physics. a wave in which the direction of displacement is the same as the direction of propagation, as a sound wave. Cf. transverse wave. [1930 35] * * * ▪ physics       wave consisting of a periodic disturbance or vibration that takes place in… …   Universalium

• Mechanical wave — Ripple (surface wave) in water is a material wave. A mechanical or material wave is a wave that needs a medium to travel. The oscillating material does not move far from its initial equilibrium position, as only the energy is transferred by… …   Wikipedia

• sound wave — noun (acoustics) a wave that transmits sound (Freq. 3) • Syn: ↑acoustic wave • Topics: ↑acoustics • Hypernyms: ↑wave, ↑undulation …   Useful english dictionary

• sound wave — ► NOUN ▪ a wave of alternate compression and rarefaction by which sound travels through a medium …   English terms dictionary

• sound wave — noun Physics a wave of compression and rarefaction, by which sound is propagated in an elastic medium such as air …   English new terms dictionary

• impact crater — Astron., Geol. crater (def. 2). [1890 95] * * * ▪ landform Introduction       any feature on the continents that has been created by the impact of cosmic bodies (meteorites, asteroids (asteroid), or comets (comet)) on the Earth s surface. In fact …   Universalium

• Valveless pulse jet — A Valveless pulse jet (or pulsejet) is one of the simplest jet propulsion devices ever designed, and is the simplest form of jet engine that does not require forward motion to run continuously. Valveless pulsejets are low in cost, light weight,… …   Wikipedia