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chapter 25 rieke
Question | Answer |
---|---|
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 |