Find the momentum of a system which includes a driver inside a truck. The truck has mass 1,500kg, the driver has mass 75.0kg, and the velocity is 24m/s.

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

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.

k2s for potassium sulphide