Which characteristics describe a point charge?
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a. it has a large volume and acts uniformly within its volume.
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b. it takes up no space and does not act on its surroundings.
c. it takes up no space and acts uniformly on its surroundings.
o
d. it has a large volume and acts uniformly on its surroundings.

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

50 inches should be the resultant vector

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.