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Conceptual Physics

Chapter 25

QuestionAnswer
vibration repeating back-and-forth motion about the equilibrium position.
wave a disturbance that is transmitted progressively from one place to the next with no actual transport of matter.
period time of a back-and-forth swing of the pendulum.
simple harmonic motion the back-and-forth vibratory motion of a swinging pendulum.
sine curve pictorial representation of a wave.
frequency number of vibrations an object makes in a unit of time.
hertz unit of frequency. (Hz)
transverse waves whenever the motion of the medium is at right angles to the direction in which a wave travels.
longitudinal waves when the particles oscillate parallel to or along the direction of the wave rather that at right angles to it.
interference pattern regular arrangement of places where wave regular arrangement of places where wave effects are increased, decreased, or neutralized.
constructive pattern crest of one wave overlaps the crest of another and their individual effects add together.
out of phase crests of one wave overlap the troughs of another to produce regions of zero amplitude.
in phase the crests of one wave overlap the crests of another and the troughs overlap as well.
standing wave a wave that appears to stay in one place-it does not seem to move through the medium.
nodes stationary points on a standing wave.
antinodes positions on a standing wave with the largest amplitudes.
Doppler effect apparent change in frequency due to the motion of the source (or receiver).
blue shift increase in frequency-because the increase is toward the high-frequency or the blue end of the color spectrum.
red shift decrease in frequency-because it is referring to the low-frequency or the red end of the color spectrum.
bow wave crests overlap at the edges and the pattern made by these overlapping crests create a v-shape.
shock wave 3-dimensional wave that consists of overlapping spheres that form a cone-shape.
sonic boom sharp crack heard when the shock wave that sweeps behind a supersonic aircraft reaches the listeners.
Created by: 15_AGlaeser