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Particle Physics

Relatively recent experimental results have confirmed what philosophers throughout history had theorized all along; that all matter is made up of elementary particles. Those curious about this cutting-edge field of physics known as particle physics should post their questions here, including those about fundamental particles, fundamental forces, Grand Unified Theories, and the extraordinary devices that have been or need to be engineered to research them.

3,842 Questions

What happens when a neutron hits water?

When a neutron hits water, it interacts with the atoms in the water molecules. It bounces around, and transfers energy, much like a billiard ball. As a result, it loses energy and is slowed down. This makes water an excellent moderator for nuclear power plants, causing the neutron to slow down to the thermal range where it can interact with subsequent uranium or plutonium atoms.

It is also possible that a water molecule (oxygen or hydrogen atom) can absorb the neutron, causing change in isotopic identity, fractioning the water molecule into radioactive oxygen and hydrogen.

What is classical particle?

Classical physics refers to the branch of Physics whereby energy and matter are two very different concepts. It is usually based on the theory of electromagnetic radiation and the laws of motion.

What is another hypothesis about the composition and structure of the neutron proton and electron?

This is a pure guess work. Sincerely speaking I did not get that concept of colors and flavors in the quarks. So I designed this independent hypothesis. Still so may things are not clear to me. It should be taken as a pure guess work. As per the quantum theory there is fixed mass is there, in the Neutron, Proton and electron. Here the proton, neutron and electron are made up of three rods of miniature magnets. Each magnet is made up of mass that spins around itself with very high speed. Say in 'clockwise' direction. (The length of the magnet may be tens of times to thousands of time more than the breadth of the the magnet.) The spin has given the mass a magnetic property. The spin has given positive electric charge at one end and negative electric charge at another end. This charge can not 'flow' here. It is perfectly static. As there are no 'electrons' are there here to carry the electrical charge. The mass of the magnet is about 1876 times more in case the proton as compared to that of electron.

( The magnets do not collapse into a bundle. This is there, just because of the very high centrifugal force. Centrifugal force is there because of the very high speed of the spin of the fan. This spin is generated as a result of the spin of the individual miniature magnets. Electrical charge and magnetism has to go in, hand in hand, as per my knowledge.)

Now about the arrangement of the three miniature magnets in case of the proton, neutron and electron Now about the structure of the proton. Here the miniature magnets are placed like the 'Y' letter, or like the blades of the fan, which has got three blades. Here the arrangements is peculiar. Two magnets are having positive charge or say the north pole out side and say the south pole or negative charge at the center. Normally two same poles will repel each other. But both are held together by the north pole or the negative charge of the third magnet. So here you have the north pole spinning in between the two south poles. That gives stability to the structure and composition of the proton. Addition of two south poles and one north pole will give you net one south pole at the center. That means addition of two negative and one positive charge will give you net one negative charge at the center of the proton. Addition of two north poles and one south pole will give you net one north pole at the periphery. That means addition of two positive and one negative charge will give you net one positive charge at the periphery. Addition of two negative and one positive charge will give you net one negative charge at the center. Now the three magnets are rotating around the axis like the blades of the fan. At the periphery, you have got two say north poles and one south pole or two positive and one negative electrical charge. The addition of two north poles and one south pole will give you net one north pole or addition of two positive and one negative charge will give net one positive charge. Now you have a fan having north pole at the periphery of the fan and south pole at the center of the fan, or the fan which has got the positive charge at the outer side and negative charge at the center of the fan. For the outside world this fan acts like to have unit positive charge.

Now the structure of the neutron. It has got the same 'Y' shape like a fan. You draw a diagram of the proton as given above. You have two positive charges and one negative charge out side. Now you add one electron to one positive charge out side. It has become neutral. Then you add a pair of positron and electron. Together they are nothing. So they get created by reverse process of annihilation. Positron is added to the negative terminal. Electron is added to the positive terminal. Now you have a neutron ready with no charge and added the mass of three electrons. ( The mass of positron is being equal to electron.)

Now to confirm this fact by simple mathematical calculation. Protons are only about 99.86% as massive as neutrons, while electrons are only about 0.054% as massive as neutrons. Now to multiply the mass of electron by 3. 0.054*3 = 0.162. Add this figure to 99.86. 99.86+0.162=100.02.

Here the mass is not exactly 100. The difference has some thing to do with the measurement of the spinning mass. I will like to explain this on the basis of simple experiment. You attach the balls of metal to the ends of the fan. The length of the blades of one fan are longer. The one with longer blade will strike harder. Here both the fans are rotating with the 'same' speed.

Now about the composition of the electron. Electron is also made up of three miniature magnets. The mass of the magnets is 1/1976 times less than that of proton. The miniature magnets are placed here in reverse direction to that are placed in case of the proton. So you have net negative charge outside. The speed of spin will be 1976 times more than that of proton and neutron. This has to be there to generate the equal and opposite electrical charge. This is compatible to the quantum theory.

Now to explain the instability of the neutron in the free state and stability in the nucleus.

In the free state of neutron, two electron and positron are liberated. This happens due to the centrifugal force. One electron and positron annihilate each other. As a result the single electron is expelled out. I prefer not to comment on the mass and effects of anti-neutrinos to avoid the lengthy discussion.

Now to explain the stability of the neutron in the nucleus. You have to do a simple experiment for this. Cut the pieces of paper like 'Y' shape. Write 'P' at the center of few such papers. These are protons. Write + sign at two ends and - sign at the third end. Then write 'N' at the center of others. Here you write two + and one - sign at the periphery. In addition you write - sign outside the + sign. Write + sign out side the - sign. These three denotes the two electrons and one positron. Now you have a model of proton with two positive charges out side and one negative charge outside. You have a model of neutron with two negative charges outside and one positive charge outside. Go on placing proton on the neuron with opposite charges. You have got the packed nucleus. Now the isotopes also can be explained very easily. You put that one neutron above the proton in deuterium and one below and one above in case of tritium. Here the distance is very less. So the force of gravity will be exceedingly high. Just try to put the figures of the masses and distance, in the formula of the force of gravity and see.

Now comes the best part of the story. It is presumed in the beginning that the the miniature magnets are rotating in the 'clockwise' direction. If you rotate the magnets in reverse direction, you get exactly opposite poles of the magnets and exactly opposite charge in case of the proton and neutron. They are called as anti-proton and anti-neutron. Here the direction of the rotation of the fan gets reversed. The net magnetic effect will be zero, the net charge will be zero in case of the anti-neutron. But the direction of the north to south poles will be reversed. The proton and anti-proton will annihilate each other. The neutron and anti-neutron will annihilate each other.

Now, the protons and neutrons are placed alternately to give you nucleus. The stability of the structure tend to disturb as the height of the structure increases. That can be understood very easily. It is like that the tall building tend to fall. Say after the atomic number of the lead. Then the nucleus becomes unstable. Here the one question remains unanswered. why there are more neutrons than the number of protons as the atomic number increases. The reason is simple. You need more of the packing material, which is neutral. Here those extra neutrons has got different structure. The miniature magnets form a triangle. Here the north pole of one miniature magnet comes in contact with the south pole of the other miniature magnet. Or you can say that one positive charge comes in contact with the negative charge to give perfectly electrically neutral particle. Here I want to make a statement that the electrical charge can not exists without magnetic field and vice verse. They go hand in hand.

(When you talk of of electrical charge, you tend to imagine the transfer of the electrical charge. Here the electrical charge in the miniature magnets in the particles is totally different. It can not be transferred to other particle. It is perfectly static. You need electron to transfer the electrical charge. Here there is in no electron to transfer the electrical charge.)

As per this hypothesis the proton is a miniature magnet. That is why the protons get in alignment in very high magnetic field. This is the mechanism of action of MRI scan.

This theory should also explain the simple question that arise in the mind of every child. The question is to why the proton and electron do not come together to form a neutral particle. The electron is thrown away from the proton. As the centrifugal force is more than the force of attraction between the opposite charges. They are not the simple particles with positive and negative charge.

Now about the mass of proton and neutron. All the protons have got the same mass. But all the neutrons do not have exactly the same mass. Some of the neutrons are fan shaped. They have the added mass of two electrons and one positron. Some other have the shape of triangle. They do not have two electrons and one positron added to it. So what you get is the 'average' mass of the neutron. That is why the 'average' mass of neutron is 'not' equal to proton with added electrons. It is little less than that. The quantum theory was preventing me to accept the mass of the neutron.

Now about the liberation of the anti-neutrinos in the decay of the free neutron. You should get large quantity of the neutrinos in the decay of the neutron. Because only one electron is ejected and rest of the mass is converted into smaller particles like anti-neutrinos.

There is very simple explanation for the emission of the anti-neutrinos. It takes fairly large energy to expel the electron from the neutron. This much anti-energy or the negative energy is converted into anti-neutrinos that you get in the process.

Not a single anti-neutrino or the neutrino you get for free in the space.

How many dimensions of string theory exist?

To eleborate on the previous answer there are at least 10 spacial dimensions and 1 dimension of time. There appears to be some truth behind string theory with respect to the quantum world, explanation and visualization follows. Take a box, the box represents the 3 spacial dimensions that we know; width, heigth and depth. Now take any top corner of the box and go to any other corner. You will see you can do this 7 times. Now rather that imagining a straight line between each of those corners, imagine them folded onto themselves. This appears impossible because we are big and can only see 3 dimensions and we can perceive time. But the quantum particles see 7 dimensions of space clearly and our 3 dimensions less clearly. To illustrate this, you are a quantum particle stopped at the road in outter space. You see 7 major highways, and you can barely see 3 trails (our 3D space). You will take one of the highways, but whilest you are on one of the 7 spacial dimensions, you will still be within 3D space (as if you saw and took a shortcut) which the macro i.e., atoms cannot see or do. Technically within 4D space (3D + Time). So a quantum particle is at all times in 5 dimensions whereas we are in 4 dimensions. This is why quantum appears random from 3D analysis because they are always moving on 5 planes.

What kind of electrical charge do electrons have?

Neutron is a neutral particle.

Proton has one positive charge.

Electron has one negative charge.

What is electron pair effect?

Ionization is the process of removing one or more electrons from a neutral atom. This results

in the loss of units of negative charge by the affected atom. The atom becomes electrically

positive (a positive ion). The products of a single ionizing event are called an electron-ion pair.

Why flow of electrons is considered as current?

Because that's basically what "current" means - that there is something that flows. For comparison, water flowing in a river is also called a "current".

What is a scatter diagram how is it useful?

Sometimes when we graph the relationship between two varying quantities of real life on a coordinate plane we get dots scattered on coordinate plane.

For example graph average math score of students from grade 8.

Let's consider their 8-week score.

(1, 50) (2, 52), (3, 49), (4, 58), (5, 60), (6, 65), (7, 64), (8, 68).

If you plot these coordinates you will get the points scattered points.

1) It is helpful to study the relationship between two varying quantities.

2) It says whether the relation is positive or negative. Sometimes we may not have any relation.

3) Such relation is called as correlation.

4) In the above example the graph has positive correlation. As the week increases the average scores also increases. There may be some down fall. Overall, it is a positive variation.

What are the two easily detectable products of the decay of a free neutron?

A free neutron decays into a proton, an electron and an electron neutrino (with a mean lifetime of about 15 minutes).

Of these, the proton and electron are readily detectable. Neutrino detection is extraordinarily difficult.

What is an electron cutout factor?

An electron cutout is placed in the path of an electron beam in order to change the shape of the beam. Because this changes the size and shape of the beam, it will change the dose to the patient due to scatter, field size dependence (especially for small fields), etc. Because MUs are calculated based on the standard 10 cone without any cutout, we must determine how an electron cutout affects measurements regarding this setup. Therefore, one measures dose through an electron cutout (with whatever cone size) and also measures the 10 cone at the same depth and energy. The ratio of these is a cutout factor which can be used to determine MUs (dose required from the machine to produce desired effect in patient).

If an electron is released at the negative pole of a 12v car battery what happens to it?

It will move following a random walk due to collisions with atoms and other electrons at a speed of roughly 1 mm per hour through the car's wiring and circuits towards the positive pole of the battery.

Note that the speed of the individual electrons and the speed of electric current are totally different, the electric current moves at a speed approaching that of light.

Why do protons accumulate outside the membrane and why is this necessary?

Protons accumulate outside the membrane, so that a concentration-gradiënt is established. Because of this the protons want to flow inside, and this "current of protons" is enhanced by a membrane enzyme, called ATP-synthase to produce ATP.

So, basically a potential is created, which can power the production of ATP.

How to remove Proton Gen 2 stereo?

Unlock the car. Open the door. Get in. Start the engine and warm up to 10 mins. Drive it out to the driveway. Head for the highway with a speed of 50 mph. Turn in to the nearest workshop. Stop the engine. Roll down the window . Climb out from the car. Pay the dude there to do it for you. Simple as that.

Why do electrons go in One Direction?

The protons are ugly so the electron try to run away from them but there are walls so they can only go one directon away fro thr proton. Protons are fat, ugly, an have no life.

Is the mass of an electrons is larger than the mass of an neutron s?

No, an electron is MUCH smaller than a neutron. About 1/1836 or something like that. Just Google "mass of an electron".