### Waves and sound

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Across
3.the distance between two similar points in successive identical cycles in a wave, such as from crest to crest or trough to trough
4.the property of a medium that returns to its original shape after being disturbed
7.the region in a longitudinal wave in which the medium's particles are closer together
9.the minimum point of a transverse wave
12.the cyclycal motion of an object about an equilibrium point
15.the material that permits the transmission of energy through vibration
16.in a continuous transverse or longitudinal wave, the x-coordinate of a unique point of the wave
17.a wave in which particles vibrate perpendicular to the direction of the flow of energy
18.the state of two identical waves that have the same phase shift
19.the transfer of energy through a material due to vibration
20.the displacement of a particle over a certain time interval; the difference between the particle's initial and final positions
Down
1.the shape of a wave when graphed
2.a shift of an entire wave along the x-axis with respect to an otherwise identical wave
5.a wave in which particles vibrate parallel to the direction of the flow of energy
6.the maximum point of a transerse wave
8.the state of two identical waves that have different phase shifts
10.a form of energy produced by rapidly vibrating objects detectable by sensory organs such as the ear
11.the number of complete cycles that occur in unit time, usually 1 s; measured in hertz(Hz)
13.the maximum displacement of a wave from its equilibrium point
14.the region in a longitudinal wave in which the medium's particles are farther apart

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