Well, was somehow funny to read the topic. Everybody understands everything, though the amount of people who do believe in earth being flat is somehow growing (according to latest news reports at least). Something is definitely wrong with this world.

The thing of floating object is Archimedes law.

Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces and acts in the upward direction at the center of mass of the displaced fluid. Archimedes' principle is a law of physics fundamental to fluid mechanics. It was formulated by Archimedes of Syracuse.


This is the principle explaining the motion of an object immersed in a fluid.

But it only explain upward motion.



Basically if the weight of the volume of fluid equivalent to the volume of the immersed object is superior to the weight of the object, the object will float.

Aka it floats if the upward force equivalent to the weight of the volume of fluid occupied by the object is greater than gravity force pulling it downward.

If not it will sink due to gravity.

The density difference only explain upward motion. And even the upward motion is related to the notion of pressure differential , which wouldnt happen without gravity.


https://en.m.wikipedia.org/wiki/Archimedes%27_principle#Formula


Consider a cube immersed in a fluid, with its sides parallel to the direction of gravity. The fluid will exert a normal force on each face, and therefore only the forces on the top and bottom faces will contribute to buoyancy. The pressure difference between the bottom and the top face is directly proportional to the height (difference in depth). Multiplying the pressure difference by the area of a face gives the net force on the cube – the buoyancy, or the weight of the fluid displaced. By extending this reasoning to irregular shapes, we can see that, whatever the shape of the submerged body, the buoyant force is equal to the weight of the fluid displaced.

The weight of the displaced fluid is directly proportional to the volume of the displaced fluid (if the surrounding fluid is of uniform density). The weight of the object in the fluid is reduced, because of the force acting on it, which is called upthrust. In simple terms, the principle states that the buoyant force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational constant, g. Thus, among completely submerged objects with equal masses, objects with greater volume have greater buoyancy.



Without gravity, there is no pressure, no weight, no density, no upthrust force, no Archimedes, all stay in place.

"it only explain upward motion"

Archimedes principle only explains motion only in one direction, how does this make sense? That's saying buoyancy causes objects to float/rise yet it doesn't work in the other direction and for some reason a different mysterious magical force called gravity makes them sink/fall?

Then you quote Wiki "only the forces on the top and bottom faces will contribute to buoyancy" and contradict yourself. The force acting on the atmosphere and defining up and down is the electric field between the dome and ground not the magical force of gravity.

Downward motion = gravity.

Upward motion = Archimedes ( pressure diffetential ).

It work upward if the density of the object is inferior to the fluid. Otherwise it still work upward, but not enough to counter gravity.

The sum of forces of all faces cancels each other, except with the pressure differential there is still non zero force upward.

If this upward force due to pressure differential is stronger than gravity it floats.

Otherwise it sinks.

Either it's in the atmosphere or water or any fluid it's the same principle.

It's not magic it science.

Electric field could only explain force on charged objects particules. Not on wood, stone, or non ionized objects.

Depend on the charge of the objects ? ..

If it's a stone, not much happen.

Electric field doesnt make much sense.

Do you mean magnetic field ?

Induction is magnetic field created by electric current passing through a wire or conducting material.

But the earth magnetic field can be seen with a compass, if that was the force creating the fall of body, they will all fall toward North pole no ?

And it only affect metals, or conductor, or charged particules.

Gravity affect all massic body.

These are the equation for electro magnetism.

https://en.m.wikipedia.org/wiki/Maxwell%27s_equations


The equations are not exactly same between gravity & em though, but there are similarities in the math.



https://en.m.wikipedia.org/wiki/Unified_field_theory

In physics, a unified field theory (UFT) is a type of field theory that allows all that is usually thought of as fundamental forces and elementary particles to be written in terms of a single field.

There is currently no accepted unified field theory, and thus it remains an open line of research. The term was coined by Einstein, who attempted to unify his general theory of relativity with electromagnetism.

https://en.m.wikipedia.org/wiki/Classical_unified_field_theories

Since the 19th century, some physicists, notably Albert Einstein, have attempted to develop a single theoretical framework that can account for all the fundamental forces of nature – a unified field theory. Classical unified field theories are attempts to create a unified field theory based on classical physics. In particular, unification of gravitation and electromagnetism was actively pursued by several physicists and mathematicians in the years between the two World Wars. This work spurred the purely mathematical development of differential geometry.

This article describes various attempts at formulating a classical (non-quantum), relativistic unified field theory. For a survey of classical relativistic field theories of gravitation that have been motivated by theoretical concerns other than unification, see Classical theories of gravitation. For a survey of current work toward creating a quantum theory of gravitation, see quantum gravity.





But they are still different forces, they are not inter exchangeable for the moment. 



But there is no more reality into magnetic field than gravity field in itself. We understand better how to generate magnetic field with electric current, but the notion of field is as weird with magnetism than with gravity in itself.

He probably brought it up because of your comment:


Which is utter crap.

Me thinks you need to understand the principles of...well, science in general...but in this specific instance the relationship between electric and magnetic fields and induction.