0
Nuclear Physics
Most commonly known for its applications in nuclear energy and nuclear weapons, Nuclear Physics also has applications in medicine and archaeology. This category is for questions about the branch of physics that deals with the study of the forces, reactions, and internal structures of atomic nuclei, Nuclear Physics.
3,164 Questions
An electric field is a region surrounding an electrically charged object where another charged object experiences a force. It is a vector quantity that describes the direction and magnitude of the force that a positive test charge would experience if placed in the field. Electric fields can be created by static charges, moving charges, or changing magnetic fields.
Is electron an example of a lepton?
Yes. In physics, electrons are defined under the classification of leptons.
Yes. Leptons are a class of elementary particles that interact with each other by the weak interaction. The electron is one of these particles.What is speed of fast neutron?
The initial velocity after fission is something like 30,000 km/sec, 10 percent of the velocity of light. In moderated reactors the neutrons are slowed down by collisions with the moderator atoms and eventually (if not captured) arrive at the mean velocity of the moderator atoms themselves, or more correctly they achieve the same distribution of such velocities, which is around several km/sec depending on the moderator material and its temperature. These neutrons are then said to be thermalised as they have come into equilibrium with the thermal related moderator velocity distribution.
What is the product of beta decay potassium-42?
The product of beta decay of potassium-42 is calcium-42. In beta decay, a neutron in the potassium-42 nucleus is converted into a proton and an electron (beta particle), leading to the formation of calcium-42.
Where nuclear fission is found?
In a nuclear power plant and in nature in (low levels.)
With any form of radioactive decay it is possible for atoms to be split. The sustained reaction is the foundation of both nuclear weapons and nuclear power plants where the fission is self-sustaining for a period of time.
A simple physical model is a pool (billard) table when you initally break. The cue ball is a small particle that breaks up the racked balls. Now imagine hundreds if not millions of other racked balls. A chain reaction of breaks continues until there isn't enough energy to stustain the fission of atoms. Low levels of this happen all the time with radioactive material in nature. Once there is a "critical mass" of very specific radioactive material a sustained chain reaction happens. Controlled you can get nuclear power by siphoning the reaction in the form of heat to turn turbines for power, let it all go at once and you get a nuclear bomb.
Fission is the splitting of atoms, fusion is merging atoms. A hydrogen bomb uses both fission and fusion. Fission to start the reaction (Plutonium) and an outer shell that (Cesium,cobalt, if memory serves me correctly were two material used for the outer casing), from the force of the fission, causes the fusion of hyrodgen (hence H-Bomb).
Let's denote the volume of liquid A in the can as x liters. Initially, the ratio of A to B was 75:25 (3:1). When 9 liters are drawn, the ratio becomes 3:5. This means that 3/8 of the remaining liquid is A and 5/8 is B. When the can is filled with liquid B, the ratio becomes 1:4. Therefore, 4/5 of the mixture is now B, and 1/5 is A. From this, we can set up an equation in terms of x to find the amount of liquid A in the can initially.
What is the speed of beta particle?
The speed of a beta particle can vary, but it typically ranges from 90% to 99% of the speed of light. This corresponds to speeds of approximately 270,000 to 299,000 kilometers per second.
Methods for getting energy from sunlight?
One method is through the use of photovoltaic cells, which convert sunlight directly into electricity. Another method is through solar thermal systems, which use mirrors to concentrate sunlight to produce heat for generating electricity or heating water. A third method is through photosynthesis in plants, where sunlight is converted into chemical energy through the process of photosynthesis.
What is the force that pulls up wax on a wick?
Capillary action is the force that pulls up wax on a wick. This process occurs due to the adhesive forces between the wax molecules and the wick material, allowing the wax to move against gravity.
Transmutation does not occur in which of these nuclear processes?
Transmutation does not occur in nuclear fission, where atomic nuclei are split into smaller fragments. Transmutation involves changing the identity of an atomic nucleus by altering the number of protons and neutrons it contains, which occurs in nuclear fusion reactions and radioactive decay processes.
Heavy nuclides are atoms that have a high atomic number and are typically found in the lower region of the periodic table, such as elements like lead, uranium, and thorium. These nuclides often have a high mass and can be unstable, leading to radioactive decay.
What is the force that holds a nucleus of an atom together?
The nuclear force or nuclear binding energy holds an atomic nucleus together. (Some science teachers insist it's called the strong nuclear force, which is not quite correct.)
Nuclear binding energy is this nuclear force that overcomes the repulsive electrostatic force of the protons, which is trying to push the nucleus apart. The nuclear binding energy is created from what is called mass deficit. When an atomic nucleus is fused, all the protons and neutrons in that nucleus give up a small amount of their mass, and this mass is converted into the binding energy that holds the nucleus together. And if you guessed that an atomic nucleus has less mass than the sum of the masses of its constituent protons and neutrons, the nucleons, you would be correct.
We sometimes call the binding energy nuclear glue, and it is derived from the stong nuclear force or strong interaction. That also gives rise to another term used for nuclear binding energy, and that is residual strong force. The reason we say that nuclear binding energy is derived from the strong interaction is that the stong interaction actually holds individual protons and neutrons together. It is the strong interaction that binds quarks and gluons together into individual protons and neutrons. And it is in nuclear fusion that the strong interaction mediates the creation of the binding energy to hold a newly fused nucleus together.
Answer: Nuclear binding energy or residual strong force
We know protons are all positively charged, and a fundamental law of electrostatics is that like charges repel. But under extreme conditions, nuclear fusion can occur. Positive charges are forced together with neutrons, and all of the particles undergo changes. Each particle gives up a small amount of mass, and this mass is converted in to nuclear binding energy or nuclear glue. And it is this nuclear glue, what is called the residual strong force, that overcomes the repulsion between the protons and binds all the particles in the nucleus together.
At the extremely small distances between the protons, the binding energy is greater than the electrostatic repulsion trying to force the protons apart. This is true for elements up to those at the upper end of the periodic table. The heaviest elements experience instability because of the large numbers of protons in their nuclei, and for the heaviest elements, there is no way a "permanent" nuclear arrangement can be made. The residual strong force cannot act across these large nuclei to make them stable, and they exhibit nuclear instability. This results in them being subject to radioactive decay.
It is not entirely correct to say that the strong force holds atomic nuclei together, as the strong force (strong interaction) actually holds individual protons and neutrons together. It does this by tightly binding the quarks and gluons that make them up. It is the residual strong force that holds atomic nuclei together. That is the source (through mass deficit) that creates the nuclear binding energy or nuclear glue that acts to oppose the electrostatic repulsion of the protons. You might be aware that the strong nuclear force, along with the weak nuclear force, the electromagnetic force, and gravity, are the four fundamental forces in the universe.
It is called, appropriately enough, the nuclear force.
It goes by several names: strong force, strong nuclear force, and color force. They're all describing the same thing.
Strictly speaking, the strong force is what holds quarks together in a hadron. The force that holds hadrons together is the residual color force.
the strong nuclear force is created between nucleons by the exchange of perticles called mesons (changeless particles hadrons made up of one quark and one antiquark).as long as the meson can happen,the strong nuclear force is able to hold the participating nucleons together
- The nucleus is held together by the strong force
- The electrons are held in the atom by the electromagnetic force
Protons and neutrons are held together in the nucleus by the nuclear force, also known as the residual strong atomic force, also known as residual binding energy.
Strong atomic force (binding energy) holds quarks together to form protons and neutrons. It is the strongest force in the universe, followed by a factor of about 100 by the electromagnetic force, and then by many orders of magnitude by the weak atomic force, and then by many many orders of magnitude by gravity. Since it is stronger than the electromagnetic force, it easily overcomes the tendency of the up quark (charge +2/3) and down quark (charge -1/3) to repel each other.
Of course, all of this is a function of distance, so gravity has the most effect, when you consider distance, but in the range of a single proton or neutron, the strong atomic force is king.
What is left over from holding quarks together is called residual binding energy, or simply, the nuclear force. The nuclear force holds protons and neutrons together. While less than the force of binding energy, it is still more powerful than the electromagnetic force, so the protons with a charge of +1, though tending to repel each other, still stick to each other.
Well, its not quite that simple...
In the distance of a proton or a neutron, there is no question about strength but, beyond that, the nuclear force degrades with distance, as does the electromagnetic force. Interestingly the nuclear force degrades faster than the electromagnetic force...
The ramification of this is that, for smaller nuclei, with exceptions noted below, the nuclear force wins out over the electromagnetic force, and the nucleus is stable. This holds true up to atomic number 82 - iron. Starting at atomic number 83 - bismuth - the electromagnetic force starts to win out over the nuclear force, simply because of the size of the nucleus, and the nucleus becomes unstable. As a result, no nuclide starting at bismuth and up is stable - they are all radioactive, while most nuclides from iron on down are stable.
The exception, as promised, is that we still have the issue of proton to neutron balance. It turns out that there is an ideal configuration, based on many things, which is beyond the scope of this question. Suffice to say that 80 of the first 82 elements, from hydrogen to lead, excluding technetium and promethium, have at least one stable isotope.
In an atomic nucleus, protons and neutrons are held in together by what is officially known as the strong nuclear force. The exchange particle by which this force manifests itself is the pi meson.
Since alpha is a Helium nuclei, consisting of two protons and two neutrons, with an atomic mass of 4 and a charge of +2, it interacts very easily. As such, it can be stopped with a single sheet of paper, the skin, or just a few inches of air. Unfortunately, alpha is also a very good cancer creator because, if you ingest it, say in the lungs, it is in very close proximity to tissue that is highly sensitive.
What is proton-proton attraction?
Proton-proton attraction refers to the electrostatic force of attraction that exists between two positively charged protons. This force is one of the fundamental forces of nature that holds the nucleus of an atom together. It is responsible for overcoming the repulsive forces that exist between protons due to their like charges.
The three water circuits in the nuclear plant are the primary coolant, the secondary or main steam circuit, and the tertiary or condenser cooling system. Below is link to a fairly clear diagram that has all three water circuits in it. Look at the diagram as we give you the scoop one loop at a time. Primary coolant is circulated (forced by the main coolant pumps) through the reactor core to pick up heat. This hot primary coolant is circulated through that steam generator where it boils secondary water to create steam. The primary coolant leaves the steam generator cooler than when it went in (but still hot!), and then returns to the reactor's pressure vessel (where the reactor core is housed) to be reheated. It's a closed loop. In the secondary or main steam system, the feedwater turns to steam in the steam generator. It then leaves that steam generator and goes through the main steam header to the big steam turbines that drive the electric generators. In the main condenser below the steam turbine, the steam condenses back into water as the condenser cooling water circulates through the condenser. The water that used to be steam is now feedwater, and it's pumped back into the steam generator to begin the steam cycle again. The condenser cooling water that cooled the exhaust steam to convert it back to water is pumped out into a heat exchanger (evaporative cooling tower). Thus cooled there, the main condenser cooling water is pumped back into the main condenser to remove heat from the exhaust steam to convert it back to water. This completes the main condenser cooling cycle. A link below will lead you to a fairly clear diagram with the three cooling circuits in it. With a bit of jumping between the explanation and the diagram, you should be able to see everything clearly.
What did Ernest Rutherford discover about the structure of an atom?
Ernest Rutherford discovered that atoms have a small, positively charged nucleus at the center, surrounded by electrons in empty space. This nucleus contains most of the atom's mass and is where the protons are located. This model is known as the nuclear model of the atom.
How does the W boson affect beta radiation?
The W boson is the carrier of the weak force (weak interaction), and the weak force is the "boss" of beta decay. The weak interaction mediates the changes that take place in an atomic nucleus just prior to the emission of a beta particle. Let's look at that. In beta decay, one of two things happens. One is that an up quark in a proton becomes a down quark, and the proton becomes a neutron. The weak interaction mediates this, and a W+ boson appears, then becomes a positron and a neutrino. In the other case, a down quark in a neutron becomes an up quark, and the neutron becomes a proton. The weak interaction mediates this, too, and a W- boson appears, and then becomes an electron and an antineutrino. You can use the links below to learn more.
What type of radiation emitted by radioactive nuclei is negatively charged?
A Beta- particle is an electron, which has negative charge.
Here are some other types: Alpha is a helium nucleus, which is 2 protons and 2 neutrons (having positive charge). Positron is the antiparticle to electron. Positrons have positive charge. Gamma does not have charge. Neutrons do not have charge. Neutrinos do not have charge.
What is the product of the alpha decay of Rn-220?
The product of the alpha decay of Rn-220 is Ra-216. During alpha decay, an alpha particle, which is a helium nucleus with 2 protons and 2 neutrons, is emitted from the radon-220 nucleus, resulting in the formation of radium-216.
What statement best describes the density of an atom's nucleus?
The nucleus of an atom is highly dense, containing nearly all of the atom's mass in a tiny volume. It consists of protons and neutrons packed tightly together. The density of the nucleus is about 100,000 times greater than the overall density of the atom as a whole.
Why is an alpha particle attracted to a negative plate?
An alpha particle is made up of two protons and two neutrons, giving it a positive charge. As opposite charges attract, the positive charge of the alpha particle is attracted to the negative charge of the plate.
Why is it would be difficult to inject the nucleus of uranium with a proton?
It would be difficult to inject the nucleus of uranium with a proton because the positive charge of the proton would repel the positively charged uranium nucleus, which is also positively charged. This repulsion creates a barrier that needs to be overcome, requiring a high amount of energy for a successful injection.
Is the percentage of radioactive atoms that decay during one half-life always the same?
Yes, the percentage of radioactive atoms that decay during one half-life is always the same, which is 50%. This means that half of the radioactive atoms present will undergo radioactive decay within each half-life duration.
What is a nuclear biconcave disk called?
A nuclear biconcave disk is called a red blood cell, also known as an erythrocyte. These cells have a unique shape that allows them to efficiently transport oxygen throughout the body.
Order gamma decay beta decay and alpha deacy form weakest to strongest?
From weakest to strongest decay, the order is:
- Gamma decay - involves the emission of high-energy photons.
- Beta decay - involves the emission of beta particles (electrons or positrons).
- Alpha decay - involves the emission of alpha particles (helium nuclei).
