Is there a unified equation for the forces of gravity and electromagnetism?

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There is currently no unified equation that combines Newton's gravitational force with Coulomb's electromagnetic force. The relationship between mass and electromagnetism remains undefined, as mass and charge are considered independent quantities. No accepted theory exists that links these two fundamental forces. The discussion highlights the complexity of integrating gravity and electromagnetism into a single framework. Understanding these forces separately continues to be essential in physics.
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Is there an equation which combines Newton's equation of calculating the gravitational force between two masses with that of Coulomb's equation of describing the electromagnetic force between two particles? In other words, does an equation exist which describes the relationship between mass and electromagnetism as opposed to the charge of the masses and the electromagnetic force between them? Thank you and if I'm simply being ignorant please say!
 
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There is currently no accepted theory in which the mass and charge are related. They are independent quantities.
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
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