¿El centro de gravedad siempre estará ubicado en un lugar donde haya masa presente?

coil wire, increase current, put iron inside the coil

i think they are all correct

explanation:

they seem good

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.

increase masses, decrease separation