All are examples of electric forces except?

Answer 1

Fundamental forces in base physical theories are

• Electromagnetism (that is the essential cause of interaction between atoms and molecules, thus the cause of almost all the properties of matter as we know it, besides the source of electromagnetic waves like radio and light waves);
• Gravitation (that is the driving force of interaction between cosmic masses like planets, stars, galaxies and so on, besides the cause of gravitational attraction on the earth surface);
• Color forces (that are the interactions among quarks in the nucleons);
• Beta forces (causing the emission or absorption of electrons from nucleons transforming neutrons in protons and vice versa ).

The so called quantum standard theory collect under the same theoretical framework all the forces, but gravitation. Thus, under a fundamental point of view, the electromagnetic force is a manifestation of a more fundamental force regulating interaction between elementary particles and macroscopic bodies. Only gravitation at present appears as a completely different force.

All attempt to integrate gravitation under a general quantum theory have been a failure for a fundamental theoretical reason (that is not easy to explain simply) and perhaps a great step is needed in the general physical theory to overcome this point, if this will be possible a day, that is all but obvious.