If you hold a bar magnet in each hand and bring your hands together, will the force be attractive or repulsive if the magnets are held: a) with the two north poles together?
b) with a north pole and south pole together

Part A:

They will repel each other because same poles repel each other.

Part B)

They will attract each other because different poles attract each other..

c. newton's third law of motion

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.