Nukes are also known as Atomic bombs and atom bombs. Nukes are set off with uranium that is put into a chamber. An uranium bullet will hit the chamber to make the nuke explode.
40% of the uranium is in the chamber and 60% of the uranium is the bullet. Behind the bullet is an explosive that makes the bullet fly down into the chamber. A thermonuclear weapon weighing little more than 2,400 pounds (1,100 kg) can produce an explosive force comparable to the detonation of more than 1.2 million tons (1.1 million tonnes) of TNT.
The American’s first bombing with nukes was over Japan. The mushroom cloud rose 18 km above the bomb. This bomb wiped out he entire city leaving nothing left. Some people survived but the people under the bomb when it went off where instantly turned into carbon. If you where under a nuke when it went off, you would not survive the heat. The flash of the nuke was so bright that the light went right through your hands and appeared to be white as snow. The Americans where targeting the military base that night. Here are the photos before and after:
This is the exact same spot, you just see how much damage the nuke did. The river did not change at all but the buildings were destroyed. The people who survived the bomb had 3rd degree burns usually on there back. When a nuke goes off and explodes it is very possible to survive the explosion and not to get radiation poisoning. Step one is when you see a flash of light in the sky, drop to the floor immediately. Step two is to stay there till the shock wave has passed, and step three is to make it to a shower and wash off all the radiation. If you want to see a video of the bombing of Japan, just post in the comments.