DHDHDHSHSHSHSVSVSBSHSHHAVAVABAVABAGAGAGAGAGAGABABABABBA

Answer: It shows a type of matter in the tube
mass is how much material in an object and weight is how much it weighs
20
Explanation: use its length instead of height: pipe volume = π * radius² * length , where radius = inner diameter/2 . The volume of a pipe is equal to the volume of a liquid inside (if a pipe is fully filled with it).