Ihave homework that is about matter cubes and i don’t get it , i don’t know the volume of copper

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

The higher the astm grain size number, the finer the gran is. a)-true b)-false

You are making beer. the first step is filling the glass carboy with the liquid wort. the internal diameter of the carboy is 15 in., and you wish to fill it up to a depth of 2 ft. if your wort is drawn from the kettle using a siphon process that flows at 3 gpm, how long will it take to fill?