Board Thread:Theories and Speculation/@comment-31266380-20170213121035/@comment-734582-20170218174329

Lorenzo.r.1st wrote: energy can be brought upon from ur body, or any other matter in the universe, just by movement, so im not worried bout it yet. While you can do such things, the jutsu in Naruto can't power that way> Average daily intake is about 10 megajoule of chemical energy (conveniently, 250 grams of TNT). Considering that water heats at about 4Kj/KgK, you could heat 100kg of water about 25 degrees. Now recall that Scorch user that boiled away people? she would need 4x times that much. per person.

Consider other things, like Deidara's explosives, he would never be able to keep up his jutsu beyond maybe one or two explosives.

To fuel their jutsu, Ninja would need to eat like sportsmen just to fuel normal jutsu. The more high level jutsu (Basically the higher-level kage) would require impossible levels of eating.

Lorenzo.r.1st wrote: I thought that, what if they use the atoms in the air to make/bring their jutsu into existence? Air is, fortunately, fairly thin. It would work fine for air and fire jutsu (similar densities), but an Earth Release user can't fuel his jutsu that way. There's about a factor 1000 difference between water and air, and dirt is even heavier. So to make a cubic meter of water you'd need 1000 cubic meters of air (a cube 10m on all sides).

Returning to my original point, Ninja consistently violate the rules of physics. I don't see why they can't create mass, and why chakra can't be massless until manifested.