As a wave travels horizontally (to the right) in a transverse wave, particles: 1- are transported by the wave
2- vibrate horozontally
3- vibrate up and down
4- don’t move

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firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

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