A ton of TNT - a unit of measurement of energy equal to 4.184 ? 10 9 J, or September 10 thermochemical calories ; It is defined as the amount of energy released in the detonation of 1 tonne of trinitrotoluene .
Ton long - A unit of measurement of weight, which in the English system of measures called "tonne" is used to distinguish it from other units of the same name .