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Nuclear bombs use nuclear fission of some heavy element, usually uranium or plutonium. Thermonuclear bombs use the detonation of a fission bomb to ignite the fusion of hydrogen. Such weapons are more powerful than ordinary nuclear weapons because nuclear fusion releases more energy than nuclear fission, and because the process of fusion itself can be used to ignite more fission.
No, an atomic bomb uses fission, but a nuclear or thermonuclear bomb combines fission and nuclear fusion. Therefore, a nuke is more powerful than an atom bomb.
Not devastated, it's devastating. And it's more devastating because fusion produces more energy than fission. For example, the amount of hydrogen in a 1MT hydrogen bomb is a little more than you need to fill up a party balloon, but as nuclear fission triggers its fusion (yep, they use system like that), all that hydrogen fuses into helium, releasing a tremendous power.
They certainly wouldn't tell anybody about it...
The attack on Pearl Harbor was more devastating in the amount of deaths than 9/11.
much higher yield per bomb.
volcano weapons are more powerful than nuclear volcanoes
By thermonuclear fusion of hydrogen, producing helium. The same process that produces the energy in a hydrogen bomb (although the sun fuses far more hydrogen in the same period of time than the largest hydrogen bomb ever speculated would fuse during its entire explosion, thus producing more energy than such a bomb).
No. Other than through thermonuclear fusion.
Often these terms are used interchangeably to describe "nuclear weapons" since an atomic bomb derives it's energy from a nuclear chain reaction. What you may be referring to is that the original test and subsequent bombs dropped on Japan during WWII were fission bombs with the Trinity test bomb and Nagasaki bomb being implosion style fission bombs using Plutonium and the Hiroshima bomb being a gun style fission bomb using Uranium. Subsequently, the United States began testing the early prototypes of the modern style warheads which are called thermonuclear weapons because they use a fission bomb to ignite a nuclear fusion reaction which produces a substantially larger yield than the initial fission bombs. The first test of a thermonuclear weapon was a hydrogen bomb detonated in 1952. So in terms of yield, the modern style thermonuclear weapons are drastically more efficient than the early fission bombs.
Nuclear fuel for nuclear reactors, more than 98 %.
No. Nuclear power is more efficient because nuclear power is used as splitting atoms, making big bursts of energy, whereas coal power is simply burning coal. So nuclear power uses uranium fission to create energy (electricity), whereas coal power burns coal, emitting carbon. (Mind you, nuclear energy leaves behind radioactive waste - that is arguably easier to deal with for the time being. Not to mention that accidents at nuclear plants can have devastating environmental effects.