well okay, but I don't see how that's better intuitively than saying "2.5 ounces of wheat flour dispersed in a cubic metre of air is enough to explode quite nic

well okay, but I don't see how that's better intuitively than saying "2.5 ounces of wheat flour dispersed in a cubic metre of air is enough to explode quite nicely". [1] uh...okay? In terms of some kind of intuitive help, I don't know how much we can get out of considering food calories, I was hoping other poster could tell us more about how/why to consider food calories, for visualizing stored energy. [1] based on convert in first lazy link - this could be wrong. http://www.fatsecret.com/calories-nutrition/generic/flour-white?portionid=181555&portionamount=1.000 http://www.fatsecret.com/calories-nutrition/generic/flour-wh...)