His model was not accepted by ancient philosophers because they said (1) if earth is rotating, why can't we feel the the motion of earth, and (2) if earth is orbiting the sun, then the position should be different when it is on opposite side of the sun (parallax effect).

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.

total distance/total time

(85 + 82)/(5+3)

167/8

20 just over