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vibrate means to move back and forth very quickly
sound travels at about 767 miles per hour
sound travels through water more easily, because the molecules are connected close
Go fatser than 767 miles per hour and the sound barrier will be broken. Like a whip. 1947 called the X1 broke it.
oscillate - to travel back and forth in a rhythm.
sound travels by forcing air molecules to bump into each other.
Doppler effect - sound bends as you get furtyer away
Johann doppler discovered any object that travels in waves will transform depending on where it's going.
police use doppler effect in radar gns
We just believe dark matter exists, we don't know how it operates
exists between all matter int he universe
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