A uniform bar of length 4.0m and 80kg rest with its upper end against a smooth vertical wall and and with its lower end on the rough surface to coefficient of friction 0.32.What is the maximum angle made with the horizontal to which the bar can be inclined without sliding?​

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.