Waves in air, fluids and solids GapFill

Waves are the repeated motion of particles (or fields) around a point, that carry energy from one place to another.
 SeismicTransversePolarisedLongitudinal waves are waves where the particles oscillate in a direction at right angles to the direction in which the wave transfers energy.
 TransverseSeismicLongitudinalPolarised waves are waves where the particles oscillate in the same direction as the direction in which the wave transfers energy.
Features of waves include:

•  frequencywave speedwavelengthdisplacement, the number of waves that pass a point every second, which is measured in  joulesnewtonssecondshertz
•  displacementfrequencywave speedwavelength, the distance between two corresponding points on a wave
•  displacementwave speedamplitudewavelength, the furthest a particle travels from its central point
•  wavelengthdisplacementwave speedperiod, the time taken for a single cycle of a wave to pass a point
•  wave speeddisplacementperiodamplitude, the rate at which energy is transferred by the wave through a medium

Frequency (f) and period (T) are related by the equation  f = √(T)f = 1/Tf = 1/T²f = T³.
Wave speed (v), frequency (f) and wavelength (λ) are related by the equation  v = λ/fv = f²/λv = fλv = f/λ.