when you catch a baseball what kind of work do you do, negative or positive ? by catching a baseball, what do you change ? does the ball lose or gain energy ? what kind of energy?

we need answer choices

okay i have so many questions. but the big one here is: um wt..f is this mess? ?

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.