>>30988978This fucking picture
>one mililiter of water occupies one cubic centimeterAlready you're have to use 1×10^-3 of a unit with 1x10^-2 of a unit before you've even gotten anywhere.
>one calorieOkay, a basic unit. Except the one everyone uses is the kilocalorie. Just like the kilogram. Lots of odd 1000's kids have to know about or get tripped up.
>one percent between its freezing and boilingNow we have percentages, another 100 or 1/100th of something depending how you look at it. Plus there's an unstated premise of one atmosphere of pressure. This is not direct whatsoever.
>an amount of hydrogen weighing the same has a moleMassing, not weighing, mind you. And why is a mole a good number to use? 6×10^23? It's only that number because the gram came first! Is this direct?
>In the American system...room temperatureWhy does the American system have to start from room temperature? What's room temperature in metric? Is it a power of ten? Is your local atmospheric pressure one atmosphere exactly at all metro altitudes but not American altitudes?
What a pIle of fuckery. Powers of ten are nice, but you still have to know which of them to use and which ones get tossed aside because they are 1000 times too small to be practical. At a certain point you're looking up data in tables anyway, and the differences go away.
