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# chapter 25 rieke

what is the repeating back and forth motion abou an aqulibrum postive vibration
vibtaion is wiggle in time
what is a wave a distrubance ths is transmitted progressivly form plave to the next
wave is a wiggle in space and time
a wave cant exist in one place
2 forms of energy light and sound
pendulum is weight(bob) attavhed to a string that is free to swing
what is a cycle one compltet back and forth motion
what is a period time for one cycle
shorter pendulum shorter period
longer pendulim longer period
simple harmonic motion back and forth
since curve pictorial representation of a wave formed by swinging pendulum or nouncing spring
top of a wave crest
bottom of a wave thorths
crest to crest is called wavelength
the height of half of an wave is amplitude
wavelength symbol lambda
what is frequency # of vibrations in a given time cycle per sec symbol= f
frequecy measures in hertx or w/s
period s/w
time s
wavelength lambda
speed m/s
speed depends on the medium
sound in water is 4x faster
speed frequecy x wavelength v=frequencylambda
transverse waves are right angle to the direction of the wave motion
longitudinal waves moves back and forth in the asme direction which the wave travels.
compression wave are crest buch up
matter cant be in the same place at the same time but ____ can waves
constructive interfrence crest overlaps crest also it is out of phase
descruction interfrence crest of one wave overlaps through of another also it is in phase
node descructive
antinode constructive
what is the doopler effect change in frequency due to the motion
a car coming towards you has a high fequency
a car moving away ftom you has a low frequency
light source moving towards you higher frequecy blue shift
light source moving away from you low frequency red shift
what is a bow wave overlapping edges of the wave crests produces when the source is moving
piled up energy sound barrier
whenthe aircraft goes past this sound barrier supersonic
sonic boom conical shell of cmpressioned air that sweeps behind a supersonic object
Created by: enienas

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