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What is an uncontrolled nuclear fission?
There are both controlled and uncontrolled fission reactions. The reactors in nuclear power plants and submarines make use of a controlled nuclear reaction. Nuclear weapons make use of an uncontrolled reaction.
What year did Otto Hahn invent nuclear fission?
Otto Hahn did not invent nuclear fission. The process was actually discovered in 1938 by Otto Hahn and Fritz Strassmann through their experiments on uranium bombarded with neutrons, leading to the realization that the nucleus of an atom could be split.
What happens from the sun's nuclear fision?
Not much to speak of. There is no significant amount of nuclear fission going on in the Sun.
How is nuclear fission done?
When a neutron is fired at a U235 atom, it splits the atom in two forming two very unstable forms of krypton and barium: Kr92 and Ba141. While this process is going on, which is called nuclear fission, enormous amounts of energy and three more neutrons are released. Then these three other neutrons hit more waiting U235 atoms, and this process repeats. Uses: This can be used for many things, it can be harnessed for energy, or packed into a bomb for warfare. No matter what it is being used for, we are still imagining the possibilities of nuclear fission.
Why will nuclear fission probably never be used for powering automobiles?
Because of the need for shielding, a nuclear reactor has to be very heavy even if only a moderate power producer, so one could only be carried in a very large vehicle. Then there is the mechanical drive, if done by steam (and I don't know how else) this would mean further equipment. But apart from these problems, it would never be acceptable to have mobile nuclear reactors going up and down the freeways, because of the risk of accident and release of radioactivity.
What nuclear process is going on in the sun and what gas is being made?
the nuclear process that is going on in the sun is called nuclear fission, which is the splitting of atoms.
A sphere of matter held together by its own gravitational field and generating nuclear fission reactions in its interior?
Sounds like a star, but it is nuclear fusion there, not fission A planet is held together by its gravitational field and there is nuclear FISSION going on inside it producing geothermal heat.
What reaction keeps going on its own once it starts?
A chain reaction is a type of reaction that keeps going on its own once it starts due to the products of the reaction continuing to fuel the reaction. Nuclear fission reactions in nuclear power plants and explosions are examples of chain reactions that continue on their own once initiated.
How is energy ptoduced by the sun?
I believe that it is the fission (not fusion) of particles. Essentially it is like nuclear bombs going off but with much more energy.
Does the mass of water change going from a liquid to a solid?
No. Mass never changes, except during nuclear fission and fusion.
What is an uncontrolled nuclear fission?
There are both controlled and uncontrolled fission reactions. The reactors in nuclear power plants and submarines make use of a controlled nuclear reaction. Nuclear weapons make use of an uncontrolled reaction.
How does the sun produce enagy?
The energy produced in the sun is liberated in the form of heat and light. The reaction going on in the sun is known as Nuclear Fusion and Nuclear Fission. Both processes take place simultaneously.
What year did Otto Hahn invent nuclear fission?
Otto Hahn did not invent nuclear fission. The process was actually discovered in 1938 by Otto Hahn and Fritz Strassmann through their experiments on uranium bombarded with neutrons, leading to the realization that the nucleus of an atom could be split.
What is it called when an atom loses or gains a proton?
This is nuclear physics. When an atom gains a proton it is 'fusion'. When an atom loses a proton it is 'fission'. e.g. Using heavy hydrogen (deuterium) [2/1]H + [2/1] = [4/2]He This is very simple nuclear fusion, which is going on in the Sun. Using Uranium - 236 This disintegrates into plutonium and a neutron ; this is nuclear fission and goes on into nuclear reactors (in power stations), on Earth or Atom Bombs.
When does chemical energy change into nuclear energy?
Chemical energy does not change into nuclear energy. Chemical energy is associated with the bonds between atoms in molecules, whereas nuclear energy is associated with changes in the nucleus of an atom, such as nuclear fission or fusion.
What causes the nuclear reaction to keep going once it has started?
The nuclear reaction in nuclear power plants continues because of a self-sustaining chain reaction. In this process, neutrons produced by fission cause further fission in other uranium or plutonium nuclei, releasing more energy and more neutrons. This chain reaction is controlled and moderated by control rods to maintain a stable and controlled release of energy.
How long will nuclear energy be on earth?
nuclear power is going to be around for much longer, more fission reactors will be built to compensate in the increase in energy usage and more research is being done to make fusion energy which will replace fission reactors(this is quite a while yet before fusion reactors can be used to produce use usable energy for long periods of time).
