Pipes in your system will have a C-Factor to help determine this loss. This is a measure of the roughness of the interior of the pipe that creates this friction. Different types of piping will have a different C-Factor, and the higher the C-Factor, the smoother the pipe.
A motif is a literary term that is an idea, object, or concept that repeats itself throughout a text. A motif gives clues to theme or reinforces ideas an author wants to emphasize. A motif generally reinforces the theme of the text. A motif must be repeated throughout a text to be considered a motif.
A motif can be almost anything, a person, an object, a color, a mood that is repeated within a work. Blood could be a motif. or the color blue. Or cowboys. A motif could be used to establish a mood, a theme, or symbolic meaning. An archetype is usually some kind or form of person that is repeated throughout literature. The handsome prince is a recurring kind of person across stories, so he is an archetype.