Four or Five fundamental forces

[Dmitry67]

It is easy not to get satisfied with your proposal of separating interactions from forces. These two concepts are entagled. Fundamental interaction and fundamental force seems to be the same thing.

Best wishes,

DaTario

If you did not knew that pauli e.p. was not an interaction, how would you describe a neuron star? You would say that for some reason neutrons inside interact with each other, they repel each other and create a force strong enough to stop the collapse.

I understand that the mathematics behind is absolutely different, but at least on the macrosopic level Pauli.e.p. manifests exactly like a force

 

[Phrak]

What's a force?

 

[DaTario]

I woud say that is a concept which has as inputs neigbohr quantifiable features of a given real scene and it gives us at the end, through the machinery of Newtonian mechanics, the way our particle moves.
DaTario

 

[alxm]

Exchange energy is not a force.

Exchange energy the difference in energy due to applying different boundary conditions (symmetric/anti-symmetric solutions) to the Schrödinger equation.

To take another example of boundary conditions, if you solve the particle-in-a-box problem, you'll find that the energy is dependent on the size of the box. That doesn't mean 'size' is a fundamental force of nature.

 

[Dmitry67]

What's a force?

Good question, as gravitation is also not a force.
And electromagnetism is unified with weak interaction
How many forces do we still have?