Nuclear physics is the study of nuclear energy. There are two ways of creating nuclear energy: fission and fusion.

Nuclear weapons work with the power of fission. When a neutron hits a Uranium molecule of U-235, it changes the structure, creating an imbalance, which divides the cell into two lighter cells and some leftover, high-energy, neutrons. This split releases approximately 200MeW. The leftover neutrons then hit other U-235 cells, and so on and so forth. This chain reaction creates a large amount of energy.

The energy of one pound of Uranium exploding at 1/10,000 of a second is equal to that of 15,000 tons of exploding TNT. The atom bomb dropped on Hiroshima, Japan was the height of the average adult male of the 1940s, and vaporized a radius of four miles. And within a radius of about 20 miles from the hypocenter of the explosion, there was sever damage, which was much the work of fire.

The radiation left over from the explosion of an atom bomb causes radiation sickness, and an exaggerated growth rate in plants.