How many inches in a foot? How many feet in a yard? How many yards in a mile?Know what? American measurement system SUCKS.I like the Base 10… 10mm = 1cm. 100cm = 1m. 1000m = 1km. Just add a 0, and increase the size… makes sense, right? Yeah. It does.
Of course, the Kilogram is the only unit IN THE WORLD that has a physical manifestation. See this Youtube video by Veritasium: http://www.youtube.com/watch?v=ZMByI4s-D-Y