Which of the following statements about the planets is not true?
a. mercury has a greater eccentricity than venus.
b. uranus has the smallest mass of the outer planets.
c. neptune has the shortest rotation period of any planet.
d. earth is the most dense planet.

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

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.