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science
wave hw
| Question | Answer |
|---|---|
| definition of a wave (vocab) | energy caused by the disturbance of the medium. |
| definition of a medium. (vocab) | material through which a wave can travel. |
| transverse wave. (vocab) | the particles move up and down as the wave passes. |
| definition of a crest (vocab) | the highest point in the wave |
| definition of a trough (vocab) | the lowest point in the wave. |
| longitudinal wave (vocab) | energy is transferred from one end of an object to the other. |
| compression (vocab) | particles are pushed together |
| rarefraction (vocab) | particles are spread apart |
| mechanical waves (vocab) | waves that require a medium |
| electromagnetic waves (vocab) | waves that travel without a medium |
| amplitude (vocab) | measure of how far apart particles in a medium are. |
| wavelength (vocab) | distance from any point in the wave to the next identical point. |
| frequency (vocab) | number of waves that pass through a certain point |
| hertz (vocab) | =one wavelength per second |
| wave speed (vocab) | speed that waves are traveling at |
| force (vocab) | use of force to move an object some distance, measured in newtons. |
| work (vocab) | push or pull exerted on an object in order to change the motion, measured in joules, force x distance=work |
| power (vocab) | time it takes to get something done, efficiency and energy exerted |
| if you used 5 newtons to lift a book 4 meters, how much work did you do? | 20 joules |
| if I used 18 joules of work in 9 seconds, how much power did I use? | 2 watts |
| if the crest of a wave moves 10 meters in 5 seconds, then the speed of the wave is? | 0.5 meters per second |
| describe the relationship between wavelength and frequency. | the smaller the wavelength the higher the frequency. |
| what is the speed of a wave if the frequency was 10 Hz and the wavelength is 9 mm? | 90 seconds |
| what is the frequency of a wave if the speed was 7 cm/s and the wavelength was 5 cm? | 1.4 Hz |
| what is the formula to find speed? | wavelength x frequency |
| what is the formula to find frequency? | speed divided by wavelength. |
| how can the speed o sound depend on air temperature? | if the temperature is higher there is more room for the sound particles than if the temperature is lower. |
| what kind of wave does a sound wave have to be? | longitudinal |
| true or false: as frequency increases, wavelength decreases. | true |
Created by:
kmag
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