Which of the following are properties of mechanical waves? A. Waves transport energy, but not matter.
B. Energy travels toward the source in all wave motion.
C. The particles of the medium always move parallel to the wave
motion.
D. The three categories of mechanical waves are transverse,
longitudinal, and surface waves.

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.

pecialized keyboards

total distance/total time

(85 + 82)/(5+3)

167/8

20 just over