A car starts 200 m west of the town square and moves with a constant velocity of 15 m/s toward the east. Draw a d vs. t graph that represents the motion of the car

the answer is b, have negligible mass

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.

i don't understand. explain it clearly