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Why is the force of gravity considered so weak in the standard model?
Wiki User
∙ 13y ago
Technically gravity is not part of the Standard Model, but a good way to see that it is so weak is to consider two electrons some distances apart.
You can calculate the force of the electric repulsion and also the force of gravitational attraction between them. What you will find is that the electric force is some 40 orders of magnitude bigger than the gravitational attraction.
Also consider that even though the entire Earth is pulling on an iron nail, you can still easily lift it using a simple (and small) magnet.
Wiki User
∙ 13y ago
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Did Einstein invent gravity?
No. Nobody invented gravity. it has existed since the beginning of the universe. Isaac Newton is generally credited with "discovering" gravity, as he was the first to describe it accurately: as an attractive force between all objects with mass. Einstein later refined the model of gravity to how modern physicists understand it as a distortion of time and space.
What causes the gravitational force for two objects in space with very different masses?
The cause of gravitational attraction does not change with the masses of objects. The cause itself is still debatable because gravity has not yet been successfully incorporated into the Standard Model (which is the model which describes how particles behave and how they interact which each other). There is a separate theory, called the theory of general relativity, which posits that energy causes spacetime to bend, and what we experience as gravity is actually just objects moving through this bent spacetime. Most attempts to try to combine general relativity with the Standard Model predict that gravity is transmitted via the use of a messenger particle called the graviton. This is the way all other forces of nature work according to the Standard Model. In this view the cause of gravity would be the exchange of gravitons. On a deeper somewhat technical level, scientists have discovered that all other forces (electromagnetic, weak nuclear and strong nuclear) can be traced back to certain symmetries of nature. These symmetries can be described via the use of mathematical groups. The same thing can be done for gravity and in that way gravity would automatically be caused by the Universe being symmetric under SO(3,1) (the Lorentz group) operations.
What makes Strong nuclear and weak nuclear different?
It sounds like you are referring to the universal forces. The 'Nuclear Force' refers to two of the four known universal forces (the others are gravity and electromagnetism).The 'Strong Nuclear Force' (SNF) refers to the force that holds the atomic nucleus together against the electromagnetic force of repulsion caused by the positively charged protons. The force carrier particles for the SNF are the gluon particles.The 'Weak Nuclear Force' (WNF) refers to the force that causes radioactive decay of 'unstable' atomic nuclei. The force carrier particles for the WNF are the w+, w-, and z0 particles.- All according to the [Standard Model] of physics.
What are nucleons held together by?
The Standard Model of particle theory states that nucleons are bound together primarily by the Strong Interaction Force. These forces keep protons and neutrons together.
Is gravity a fundamental force or a curvature of space-time?
There are basically two schools of thought about gravity, one I shall call the curvature or Einstein model, and the other one I shall call the particle model. The Einstein model asserts that gravity is a curvature of spacetime and is the one predominately thought in schools, mainly because the particle model is more difficult to explain. The particle model on the other hand asserts that, just like the other forces of nature, the force of gravity is transmitted via a virtual spin-2 particle called the graviton. The particle model also says that the graviton affects, or couples to, each other particle including other gravitons. The predictions these models make are the same, because gravitons couple to everything, and to themselves, they can certainly give the same appearance as a theory of bent spacetime because there is no way to distinguish it (because there is nothing that does not couple to the graviton, and thus gravity) from a model with a rigid spacetime but with graviton self-interaction. In fact using the framework of quantum field theory, one can show that one arises at exactly the same equations using the particle model as when using the curvature model. The curvature model is older, being the model Einstein used himself, but the particle model seems to put gravity on equal footing as the other three fundamental forces (electromagnetism, weak and strong forces) which is also very pleasing. The particle model, however, has not yet been successfully been merged with the other three forces due to internal inconsistencies. We have not yet seen a graviton in a particle collider because gravity is extremely weak compared to the other forces (consider a simple magnet able to lift up a piece of iron even with the entire gravity of the Earth pulling on it!) so a graviton would only couple very weakly so it would be very hard to detect. In fact I can probably not overstate how hard it would be. A graviton couples so weakly that its influence would only become important in particle interactions at very high energies, and it is likely that at that point new physics will also emerge, such as the possible discreteness of space and time for example.
What three forces are unified by the standard model of particle physics?
Strong force, weak force, and gravity
What does the alleged discovery of the higgs boson particle mean when applied to string theory?
It doesn't mean much. The Higgs Boson is only necessary for the Standard Model to be correct; the Standard Model excludes gravity, and String Theory is a theory of quantum gravity. The two are separate from one another.
Is the word gravity an abstract noun?
The noun gravity is an abstract or a concrete noun depending on use.The noun 'gravity' is a concrete noun as a word for the force that makes any two objects that have mass move towards each other; a word for a physical force.The noun 'gravity' is an abstract noun as a word for the seriousness or importance of something, graveness; a word for a concept.
What is a model of the planets in motion around the sun called?
well the motino is called hippodelightess and it is a very strong force of gravity.
Is the take down model of the 1897 worth more than the standard model?
The takedown is generally considered more desireable. sales@countrygunsmith.net
If earth is flat would there be gravity?
Yes. There's a force of gravity that pulls you and any other mass together, no matter what shape either of you is. However, a flat earth model would have far less gravity than a sphere, causing us to float into space.
Is magnetism involved in gravity?
No. Magnetism is a part of the electromagnetic force, while gravity is a completely different force all together. The gravitational field of the Earth for example is not caused by the Earth's magnetic field. A certain model of the Universe proposed in the past, called the Kaluza-Klein theory, however, does contain some link between the two forces. Kaluza and Klein showed that a Universe with five dimensions (instead of four) and gravity would automatically have a electromagnetic force if the extra dimension was curled up. Nowadays, because of the emergence of two additional forces of nature, the Kaluza-Klein theory is not used anymore. The new model, called the Standard Model does borrow a few things from Kaluza-Klein, but the extra dimensions in the Standard Model are so-called internal dimensions and are not equivalent to the four other ones. String Theory is somewhat of a successor to Kaluza-Klein, it too proposes additional curled-up dimensions, although more than one, and they are curled up in what is known as a Calabi-Yau shape.
What is the leading Grand Unified Theory?
It depends on what you mean by leading. A few good candidates are string theory, the standard model and loop quantum gravity.
This is the version of the English language that is regarded as the model in America for writers and speakers who are considered educated.?
Standard American English
1) This is the version of the English language that is regarded as the model in America for writers and speakers who are considered educated.?
Standard English
What is the gravity model in geography?
The geographical gravity model predicts bilelateral trade flows based on economic sizes.
Did Einstein invent gravity?
No. Nobody invented gravity. it has existed since the beginning of the universe. Isaac Newton is generally credited with "discovering" gravity, as he was the first to describe it accurately: as an attractive force between all objects with mass. Einstein later refined the model of gravity to how modern physicists understand it as a distortion of time and space.
