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Compare nuclear fission and nuclear fusion?
Nuclear fusion is the process of squeezing two lighter atoms together to make heavier atoms; nuclear fission is the process of splitting heavier atoms into lighter ones. In both processes, some of the mass of the original atoms are converted into energy; fusion tends to convert more mass into energy than fission does, so fusion tends to create more energy. Heavier atoms needed for a fission chain reaction tend to be unstable and radioactive, and thus the fission process tends to produce more radioactivity.
How does nuclear fusion different to nuclear fission?
Fastern your seatbelt. We've got some ground to cover. But it won't be too difficult to grasp the fundamentals. In either fission or fussion, we are taking about nuclear processes, i.e., the physics of nuclear structure and construction/destruction of that nucleus. The big difference is fusion is the "building" of atomic nuclei, and fission is the "breaking" or "splitting" of atomic nuclei. Fusion is the bonding of atomic nuclei or nuclear particles (nucleons - protons and neutrons) to make "bigger" or "heavier" atomic nuclei. Fission, on the other hand is the splitting of the atom. As the atoms fuse or split they release energy. Lots of it. And most of it is heat energy. In nuclear weapons, the energy is released "all at once" to create a blast. If the energy is released in a "controlled" way, we can release heat at a "useable" rate and apply it to boiling water to make steam. In fusion, protons or neutrons or the nuclei of atoms are forced together and are fused to make a new atomic nucleus. The release of lots and lots of energy accompanies this reaction. That's what powers stars. Currently we can't really do any fusion reactions to make useful power. There are a few agencies working on fusion devices, but the high temperatures required to attain fusion require very special materials and controls. The current "state of the art" fusion facility is the International Thermonuclear Experimental Reactor (and a link is provided). Fusion is unlikely to become a useful source of power for many years. But what about fission? Nuclear fission involves the splitting of large atoms, usually uranium (or sometimes plutonium). When large atoms fission they produce two smaller atoms or fission fragments (and a couple of neutrons and lots of energy). The total mass of the products is less than the mass of the original atom. This mass difference is turned into energy in accordance with the Einstein equation E=mc2. Most of the energy appears in the recoil of the fission fragments, and the heat that is generated is considerable. It is that heat that we capture to turn water into steam to generate electricity. Nuclear Fission: Basics When a nucleus fissions, it splits into several smaller fragments. These fragments, or fission products, are about equal to half the original mass. Two or three neutrons are also emitted. Nuclear Fission The sum of the masses of these fragments is less than the original mass. This 'missing' mass (about 0.1 percent of the original mass) has been converted into energy according to Einstein's equation. Fission can occur when a nucleus of a heavy atom captures a neutron, or it can happen spontaneously. = Nuclear Fusion = Nuclear Fusion Nuclear energy can also be released by fusion of two light elements (elements with low atomic numbers). The power that fuels the sun and the stars is nuclear fusion. In a hydrogen bomb, two isotopes of hydrogen, deuterium and tritium are fused to form a nucleus of helium and a neutron. This fusion releases 17.6 MeV of energy. Unlike nuclear fission, there is no limit on the amount of the fusion that can occur. Nuclear fusion is taking two different atoms and combining them in to one atom, while nuclear fission takes one atom and seperates it into two atoms. Fission and fusion Fission is splitting the atom, and fusion is combining two or more atoms into one atom.
What must the inward and outward forces within the sun be in order for the sun to be stable?
Pressure and gravity are the two forces at work in a nebula. We understand that a nebula is a cloud composed of gases and dust. And when we recall that gasses expand if not contained, we will understand the internal gas pressure pushing outward. This pressure will be acting against the attractive force of gravity that is characteristic of all matter, including gasses and dust. It's gas pressure versus gravity, which is a common theme in cosmology.
What do supernovae have to do with heavy elements?
Stars are giant nuclear fusion reactors; with their intense heat and pressure from their immense gravity, they smash hydrogen atoms into helium -- this is called fusion. Helium atoms fuse together to become heavier elements; this is how all of the elements past hydrogen and helium were created (hydrogen was created by the creation of the universe, and it is believed some helium may have been created then, too, but every element past helium owes its existence to the nuclear fusion in stars). This fusion process generates energy for the star (some of the particles making up the atoms that are smashed together are converted into energy during the fusion process), which is why stars continue to burn for so long -- the fusion of atoms generates energy that fuses more atoms together. As atoms get heavier, however, they are more resistant to fusion and it takes more energy to smash the atoms together. Past iron, atoms require more energy to fuse together than the energy that comes out of the fusion process. The fusion process continues, however, because not all of a star fuses to the same element at the same time (100% of the hydrogen doesn't fuse immediately into helium ... by the time iron atoms are created, there is still plenty of hydrogen still fusing). Because stars are fluid-like plasma, heavier atoms readily sink through to the star's core. It is not a steady process, however ... heavier atoms can sometimes trap lighter ones beneath them. Gradually, though, more and more iron concentrates in the core ... but while fusion is still going on from lighter elements, the iron atoms continue fusing to heavier elements. Eventually, however, there are too many heavy atoms in a star's core and the fusion fire seizes. The iron atoms collapse and a huge explosion is generated -- depending on the star's size, this can be a nova or supernova (plural novae or supernovae). The energy of this explosion blasts away the dead star's material, including the iron and heavier elements. The heavier elements will tend to form dust and other debris, that may eventually join with clouds of hydrogen to form part of a new solar system. This is how the elements present in our solar system, and right here on Earth, came to be -- from carbon which makes up most life down to the ultra-heavy atoms like uranium, all of it was created in the fusion of stars and blasted away by novae and supernovae.
What are stresses called that tend to pull rock bodies apart?
On the contrary, the main force in the nucleus keeps particles together. This is called the strong nuclear force, and it keeps similarly charged protons together, overcoming the electrostatic
Where would you find the least dense elements in a star?
Denser elements in a star tend to condense near the star's core, while less dense elements generally move outward towards the surface to take place in nuclear fusion.
Compare nuclear fission and nuclear fusion?
Nuclear fusion is the process of squeezing two lighter atoms together to make heavier atoms; nuclear fission is the process of splitting heavier atoms into lighter ones. In both processes, some of the mass of the original atoms are converted into energy; fusion tends to convert more mass into energy than fission does, so fusion tends to create more energy. Heavier atoms needed for a fission chain reaction tend to be unstable and radioactive, and thus the fission process tends to produce more radioactivity.
Why do anorexics bloat?
Anorexics may bloat because they tend to live off of water and coffee, but they also might eat a candy bar or something else during the day to keep their energy up.
Increases in resources or improvements in technology will tend to cause a society's production-possibilities curve to?
shift outward
How do neutrons work?
There are 2 types of nuclear reaction: fusion and fission. Fusion is when 2 or more nuclei of atoms join together, fission is when one nucleus splits into two of more pieces. Larger nuclei tend to fission while smaller ones tend to fuse.With fusion the aim is to fire the nuclei at each other fast enough so that they get close enough to stick together. This gives off lots of energy and is the primary energy source of modern nuclear weapons. For fusion of nuclei smaller than iron's the energy given off is enough to speed up nearby nuclei to the point where they fuse to. This leads to a chain reaction resulting in a massive explosion.In fission a neutron is fired at a large nucleus, usually of Uranium or Plutonium. this de-stabilises it causing it to break apart. This gives off energy and fast-moving neutrons (which hit more nuclei and cause more fission, a chain reaction). This is what was used in old-fashioned nuclear weapons and is now used in nuclear power plants.Fission gives less energy than fusion (per nucleon) but is easier to start and control than fusion. You can stop a fission chain reaction by introducing cooling rods. The cooling rods absorb neutrons, stopping the process. The heat given off in the fission chamber of a nuclear power plant is used to boil water, which turns a turbine, which generates electricity.
How does nuclear fusion different to nuclear fission?
Fastern your seatbelt. We've got some ground to cover. But it won't be too difficult to grasp the fundamentals. In either fission or fussion, we are taking about nuclear processes, i.e., the physics of nuclear structure and construction/destruction of that nucleus. The big difference is fusion is the "building" of atomic nuclei, and fission is the "breaking" or "splitting" of atomic nuclei. Fusion is the bonding of atomic nuclei or nuclear particles (nucleons - protons and neutrons) to make "bigger" or "heavier" atomic nuclei. Fission, on the other hand is the splitting of the atom. As the atoms fuse or split they release energy. Lots of it. And most of it is heat energy. In nuclear weapons, the energy is released "all at once" to create a blast. If the energy is released in a "controlled" way, we can release heat at a "useable" rate and apply it to boiling water to make steam. In fusion, protons or neutrons or the nuclei of atoms are forced together and are fused to make a new atomic nucleus. The release of lots and lots of energy accompanies this reaction. That's what powers stars. Currently we can't really do any fusion reactions to make useful power. There are a few agencies working on fusion devices, but the high temperatures required to attain fusion require very special materials and controls. The current "state of the art" fusion facility is the International Thermonuclear Experimental Reactor (and a link is provided). Fusion is unlikely to become a useful source of power for many years. But what about fission? Nuclear fission involves the splitting of large atoms, usually uranium (or sometimes plutonium). When large atoms fission they produce two smaller atoms or fission fragments (and a couple of neutrons and lots of energy). The total mass of the products is less than the mass of the original atom. This mass difference is turned into energy in accordance with the Einstein equation E=mc2. Most of the energy appears in the recoil of the fission fragments, and the heat that is generated is considerable. It is that heat that we capture to turn water into steam to generate electricity. Nuclear Fission: Basics When a nucleus fissions, it splits into several smaller fragments. These fragments, or fission products, are about equal to half the original mass. Two or three neutrons are also emitted. Nuclear Fission The sum of the masses of these fragments is less than the original mass. This 'missing' mass (about 0.1 percent of the original mass) has been converted into energy according to Einstein's equation. Fission can occur when a nucleus of a heavy atom captures a neutron, or it can happen spontaneously. = Nuclear Fusion = Nuclear Fusion Nuclear energy can also be released by fusion of two light elements (elements with low atomic numbers). The power that fuels the sun and the stars is nuclear fusion. In a hydrogen bomb, two isotopes of hydrogen, deuterium and tritium are fused to form a nucleus of helium and a neutron. This fusion releases 17.6 MeV of energy. Unlike nuclear fission, there is no limit on the amount of the fusion that can occur. Nuclear fusion is taking two different atoms and combining them in to one atom, while nuclear fission takes one atom and seperates it into two atoms. Fission and fusion Fission is splitting the atom, and fusion is combining two or more atoms into one atom.
How many steps in an hour of pilates?
It varies by the instructor and type of class. With Jennifer Pilates class "Pilates-Barre-Fusion" we tend to get in around 2.5miles
Which fractures tend to occur first when a pane of glass is struck?
The glass fractures outward from the point of impact. The particles that make up the glass break apart and move upward.
Why is carbon fission not possible?
Nuclear fission can only occur in heavy, unstable nuclei, as smaller nuclei are, on the whole, more stable than the largest ones. This only continues down to iron. In elements lighter than iron the heavier nuclei tend to be more stable, so splitting apart a carbon nucleus would absorb energy rather than releasing it. Fusion of carbon releases energy. Such fusion occurs in the cores of some massive stars as they enter their final stages.
Why does the regular .68 caliber paintballs jam in the barrell of my Tiberius Arms 8.1 pistol?
The only thing it could possibly be is your paint. If you leave paint in warm weather, they tend to bloat and become larger. Thus jamming in in the breach of the marker.
How much weight do you loose when you start your period if you are over 100 pounds?
You are not guarenteed to lose weight on your perio regardless of what you currently weight. If anything, girls tend to gain weight as they bloat or retain some water weight during their periods.
What type of energy released during nuclear fusion?
Nuclear fusion is how the stars including our sun obtain their energy, where the results of the fusion are contained in the star's material and appear as thermal energy. In proposed fusion reactors on earth, a hot plasma containing atoms of deuterium and tritium (both isotopes of hydrogen) is confined in a magnetic field and made to react by heating. The idea is that by feeding in these components a power reaction would be made to be continuous. So far experimental rigs have made fusion happen but only for short times, less than 1 second. A larger experiment called ITER is planned, but it will still only be to demonstrate fusion, not to extract power. From the reaction D + T, most of the output energy will appear as energetic neutrons, and there will also be radiated heat from the plasma itself. Somehow the energy of the neutrons has to be captured, and this is likely to be as difficult to solve as the plasma reaction itself. Some material will be required which can absorb the neutrons, resulting in thermal heating, which can then be transferred to a steam cycle for power production. When one realises that this material will have to stand up to neutron bombardment for the life of the plant, it becomes apparent that this will be a big problem. My own feeling is that nobody alive today is likely to see fusion in operation as a power source.
