MHB What is the origin of action at a distance forces?

[mathmari]

Hey!

Action-at-a-distance forces are for example the gravity, the electromagnetic forces. They are reduced slowly in respect to the distance and are important even at distances comparable to the dimensions of the volume of the fluid.

Is this correct?? (Wondering)

Which is the natural origin of these forces?? (Wondering) Contact forces are for example the intermolecular forces, the frictional forces. They are reduces very quickly with the distances and are important only at distances comparable to the distances between the molecules of the fluid. The origin of these forces is the following:

1. the gases at the exchange of the momentum between the molecules
2. the liquids at the momentum transfer and the forces between the molecules of the liquid

Is this correct?? (Wondering)

 

[I like Serena]

Hey!

Action-at-a-distance forces are for example the gravity, the electromagnetic forces. They are reduced slowly in respect to the distance and are important even at distances comparable to the dimensions of the volume of the fluid.

Is this correct?? (Wondering)

Which is the natural origin of these forces?? (Wondering)

Hi! (Wave)

Seems correct to me.

The origin of gravity is mass, while the origin of the electromagnetic forces is charge. (Nerd)

Contact forces are for example the intermolecular forces, the frictional forces. They are reduces very quickly with the distances and are important only at distances comparable to the distances between the molecules of the fluid. The origin of these forces is the following:

1. the gases at the exchange of the momentum between the molecules
2. the liquids at the momentum transfer and the forces between the molecules of the liquid

Is this correct?? (Wondering)

Seems correct to me.

A lower level origin is the electromagnetic force, which mediates the transfer of momentum between molecules. (Nerd)

 

[mathmari]

The origin of gravity is mass, while the origin of the electromagnetic forces is charge. (Nerd)

Which is in general the origin of the action-at-a-distance forces?? Or can we not say that in general?? (Wondering)

 

[I like Serena]

Which is in general the origin of the action-at-a-distance forces?? Or can we not say that in general?? (Wondering)

I'm not aware of any general way to say it. (Shake)

They are called conservative forces, which means that whatever path is followed, the energy transferred will be the same. (Nerd)

 

[GJA]

Hey MHBers!

I think one way to address the general origin of action at a distance forces is to lean on the field theory notions for the gravitational and electromagnetic forces. For the gravitational case see the first two paragraphs of

Gravitational field - Wikipedia, the free encyclopedia