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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 |