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# McSweeney

### McSweeney Ch. 25 Vocab.

1.An oscillation, or repeating back-and-forth motion, about an equilibrium position. Vibration
2.A disturbance that repeats regularly in space and time and that is transmitted progressively from one place to the next with no actual transport of matter. Wave
3.The time required to complete a single cycle. Period
4.The back-and-forth vibratory motion of a swinging pendulum. Simple Harmonic Motion
5.A curve whose shape represents the crests and troughs of a wave. Sine Curve
6.One of the places in a wave where the wave is highest or the disturbance is greatest. Crest
7.One of the places in a wave where the wave is lowest, or the disturbance is greatest, in the opposite direction from a crest. Trough
8.The distance from the midpoint to the crest or the midpoint to the trough. Amplitude
9.The distance from the top of the crest of a wave to the top of the following crest, or equivalently, the distance between successive identical parts of the wave. Wavelength
10.The number of events per time; measured in hertz; inverse of period. Frequency
11.The SI unit of frequency. One hertz(Hz) is one cycle per second. Hertz
12.A wave with vibration at right angles to the direction the wave is traveling. Transverse Wave
13.A wave in which the vibration is in the same direction as that in which the wave is traveling. Longitudinal Wave
14.A pattern formed by the overlapping of two or more waves that arrive in a region at the same time. Interference Pattern
15.Addition of two or more waves when wave crests overlap to produce a resulting wave of increased amplitude. Constructive Interference
16.Combination of waves where crests of one wave overlap troughs of another, resulting in a wave of decreased amplitude. Destructive Interference
17.Term applied to two waves for which the crest of one wave arrives at a point at the same time that a trough of the second wave arrives. Their effects cancel each other. Out of Phase
18.Term applied to two or more waves whose crests and troughs arrive at a place at the same time, so that their effects reinforce each other. In Phase
19.Wave in which parts of the wave remain stationary and the wave appears not to be traveling. Standing Wave
20.Any part of a standing wave that remains stationary. Node
21.The positions on a standing wave where the largest amplitudes occur. Antinodes
22.The apparent change in frequency of a wave due to the motion of the source or of the receiver. Doppler Effect
23.An increase in the measured frequency of light from an approaching source. Blue Shift
24.A decrease in the measured frequency of light from a receding source. Red Shift
25.The V-shaped wave produced by an object moving on a liquid surface faster than the wave speed. Bow Wave
26.A cone-shaped wave produced by an object moving at supersonic speed through a fluid. Shock Wave
27.The sharp crack heard when the shock wave that sweeps behind a supersonic aircraft reaches the listener. Sonic Boom
Created by: mcsweeney

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