Joules = 21 megatons of TNT), as is usually observed in nuclear reactors and nuclear weapons. Conversely, the mass equal of the every day amount energy is minuscule, which is why a loss of energy (lack of mass) from most systems is hard to measure over a weighing scale, Except https://jasperufqzh.ivasdesign.com/43630073/the-best-side-of-saving-device