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Crawford PS Ch 12

Physical Science Chapter 12 - Periodic Motion and Waves

periodic motion motion that repeats at a constant rate
amplitude the maximum distance that a system moves from the rest position during each oscillation
period the time it takes to complete one cycle of a system
frequency the rate at which cycles repeat
damping the effect of friction on periodic motion, decreasing the amplitude
resonance the opposite of damping, outside source vibrating at an objects natural frequency increases the amplitude
pendulum a mass attached to an arm at a pivot point that swings under the influence of gravity
wave periodic changes that transmit energy from one place to another
wavelength the distance between corresponding parts of two sequential waveforms
transverse wave a wave with vibrations at right angles to the direction of travel
longitudinal wave a wave with vibrations parallel to the direction of travel
reflection occurs when a wave bounces off a surface that doesn't completely absorb its energy
refraction occurs when a wave moves from one medium to another, causing a speed change
interference when waves from different sources cross paths
diffraction when a wave naturally folds or flows around the corner of its medium
Doppler effect relative motion between a sound source and observer changes the frequency perceived by the observer
Created by: akcrawford



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