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# science

### wave hw

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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