1. A school bus moves at 15 m/s relative to Logan standing on the street. If Harrison walks towards the front of the bus at 3 m/s relative to the bus, how fast is Harrison moving relative to Logan, observing
on the street?

grav potential energy

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.