Acell phone company relies on which kind of waves in order to provide service for its customers

Microwaves

Explanation:

Microwaves are electromagnetic waves with wavelengths longer than those of terahertz (THz) wavelengths, but relatively short for radio waves. this is why a cell company would use microwaves to provide service

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d eras and periods

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.