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waves
| Question | Answer |
|---|---|
| wave | a reapting disturbance that transfers energy through matter |
| what do waves transfer | energy |
| mediun | matter through which a wave travels |
| what types of waves required a medium | mechanical waves, sound and seismic |
| electromagnetic waves | one that moves by the power of electric and magnetic fields. does not require medium |
| two types of waves | transverse and longitudinal |
| characteristics of a transverse | contains crests and trough |
| crest | resting point to top |
| trough | resting point to bottom |
| wavelength | distance from crest to crest or trough to trough, measured the same in both types of waves |
| amplitude | the hieght of a wave from rest posistion. it can be measured from rest posistion to the crest or rest position to the bottom of the wave |
| characteristics of a longitudinal wave | contain copressions and rarefraction |
| compressions | areas in the wave where the coils are tightly pressed together |
| rarefractions | wave where the coils are spread apart |
| how are surface waves formed | transverse waves and longitudinal waves combine |
| larger ampliude | the shorter the wave length |
| frequency | number of waves produced in a given amountof time |
| unit for frequency | hertz |
| wave speed |