What part of an atom can change during a nuclear reaction that cannot chand during a chemical reaction?

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

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.