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Weak force, strong force, and electromagnetic force. The other one is gravity.

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Q: Which three of the four forces in nature have been unified?
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Why is a magnetic force not considered one of the fundamental forces of nature?

The magnetic and the electrical forces are still unified and inseparable at the current temperature of the universe as the electromagnetic force. The universe would have to get much colder for them to split. Theory has been developed showing that at a certain higher temperature (I don't know what) the weak and electromagnetic forces become unified and inseparable as what is called the electroweak force. This theory has been verified in high energy accelerators. It is believed that the strong and electroweak forces become unified and inseparable at even higher temperature, and that all 4 forces unify into one at the temperature right after the big bang began.


Can unified field theory prove the ghost?

Unified Field Theory is science. By the very definition of science, ghosts are nonscientific because they have not been proven to exist. Further, Unified Field Theory describes nothingexcept for the unification of the four fundamental forces.


Have all of the important rules of nature already been discovered?

No. We still do not know how gravity and the nuclear forces are related.


What are the 3 fundamental forces?

The four fundamental forces are fundamental:The electromagnetic force, electricity and magnetism.The gravitational force, gravity.The strong nuclear force, holds protons and neutrons together, or quarks together.The weak nuclear force, radioactivity.


What is a broken forest?

A forest is broken when it has been severely affected by the forces of nature, as in a windstorm. A large number of trees will be broken or uprooted.


What are the three objectives of the Canadian Armed Forces?

The three main objectives of the Canadian Armed Forces are clear and have been their objectives since the Canadian Armed Forces were formed. The objectives are to defend Canada, to defend North America, and to defend Canada's allies.


Why are there not fewer or more than 4 fundamental forces?

One of the major goals of modern physics is to unify the 4 fundamental forces of nature into one Grand Unified Theory.A GUT would be a single, or maybe a handful, of mathematical equations capable of describing the interactions of the electromagnetic, strong nuclear, and weak nuclear forces, and also the force of gravity.Such "unification's" have been done in the past, meaning that at one point in time, there were more than 4 fundamental forces. In the 1800's, through the extensive research of several different scientists, a series of equations, known as Maxwell's Equations, were developed that completely explained the interactions of electricity and magnetism and also showed that light is a form of electromagnetic energy.Recently, scientists have successfully "unified" 2 of the 4 fundamental forces: electromagnetism and weak interaction, into the electroweak interaction.So to answer your question: there is no way to measure the number of forces in our universe. When someone tells you that there are 4 fundamental forces of nature, they are only partly telling you the truth. It would be much more correct for them to say that so far science has discovered 4 distinct, seemingly unrelated relationships among the interactions of matter in our universe.


What are the nature of forces militating against Microsoft corporation?

There are no forces militating against Microsoft, at least none have been disclosed as of now. However, there is a neck-to-neck competition going on between Microsoft and other leading competitors such as Apple and Google.


When was the Great Wall of China taken down?

some pieces may have been damaged either deliberately or by the forces of nature but the great wall of China was not knocked down.


Is coal cheap or expensive?

none , coal is made out of fossils of animals that have been stored in nature for more than thousands of years . the pressure or the forces of erosion makes the coal.


What caused the unification of Italy?

Count Cavour was known to have been one of the main forces behind Italy's unification. He was an Italian politician and activist.


What was the capital of unified Egypt?

The capital of unified Egypt was in Memphis. This capital had been moved from Abydos during the first dynasty. Another capital was located in Avaris during 1600s BC.