Unified Field

Problem is, that Newton's equation requires the constant value of G to work. But there's no G beyond the g. field of Earth True... But maybe we should? 10kg of mass should induce different force of attraction, when it's exist in a form of a metal ball and a form of gas cloud... It's you, who think, that it's irrevelant. But in this subject, state of matter has significant role in interactions between objects. If I throw a 10kg piece of steel, it will pass through 10kg of gas and it will slow down just a tiny bit. However in 10kg of water, 10kg of steel, will slow down visibly. But when two 10kg solid bodies collide directly, they loose their momentum completely. What is the distribution of matter at different states in a g. field? What kind of matter is in the center and what is placed on the outside of mass concentration? <copied> Ok, then why Solar System orbit around the center of galaxy and not around another star system, which has higher mass and is placed closer to Sun, than the galaxy center? Exactly! This is why I like to speak with people, who have proper knowledge - each time I learn new things... I don't say, that gas doesn't give back any force - but we need to include the size of a body, during those interactions. When we push a solid object in one spot, we push it as a whole body, but in a gas or liquid, we push only part of the mass - and only this part is pushing us back. And now imagine, that a solid body is attracted by the gravitation of a gas cloud - what will happen, if they collide? Simply - solid body will pass through and locate itself in the center of mass. However I would say, that it will be rather the gas, which would "wrap itself" around the solid object...

If I will push a cloud of gas, which has the same mass, as I have, I won't experience the force of the push, directed towards me. I would have to close the cloud in a container, to make it work - or turn myself into a flat surface, to interact with the gas, as a single object... Ok, then why Solar System orbit around the center of galaxy and not around another star system, which has higher mass and is placed closer to Sun, than the galaxy center?

Generally, thanks for your input Mordred. I really appreciate, when someone is discussing actual science, instead simply telling me, how stupid I am...

It doesn't matter for the bodies attracted from the outside If the body is a spherically symmetric shell (i.e., a hollow ball), no net gravitational force is exerted by the shell on any object inside, regardless of the object's location within the shell. Inside, there's no attraction towards the center. Actually this confirms, what I said... Thanks I would only add one thing - there will be attraction towards the center inside a hollow sphere, if we put there an object with bigger mass, than the entire sphere and with bigger density - only then, the hollow sphere will be attracted stronger towards this object, than the other way... That's a nice question I think, that in both directions it will start to weaken and finally disappear completely. I was thinking about it yesterday - what would happen, if we would make a tunnel through the core of Earth? I guess, that at some distance from the center, we would enter a 0-g area. But maybe I'm wrong? Maybe we would start getting heavier, the closer to the center we would move?

That's what I was thinking about - it just has to be rather precise... Poisson's equations are being used in both cases... If you have one, I will buy it... "Similar" doesn't mean "exactly the same" - it means, that they just have some things in common... Newton's law of gravitation works nicely on Earth - but how it works beyond the g. field of Earth? Because there's a lot of concentrated mass below them....?

Newton laws work with solid bodies. In the case of liquids and gases, we use different rules... Cloud of gas is a body, but can you push it as a single object with your hand? Yes - if entire Solar System is attracted towards the galaxy center, then why planets are attracted towards the Sun and not towards the galaxy? Or how galaxies interact with eachother as single objects and not as separate star systems? It's the SIZE of a field, which matters...

It depends on the medium. Turning ice into water vapor won't change the attraction on the moon (possibly?), but it will have significant meaning within an atmosphere.

But distribution of mass in space IS the density.

Not in it's inside - particles inside an uniform object (or a medium) don't experience any attraction, no matter, what is their state. But their concentration (or state) will affect the force, with which other bodies will be attracted. If we turn the Sun into a nebula (keeping it's mass), particles within the cloud won't experience any gravity, but it will affect the attraction of all the planets in Solar System...

If electrostatic charge depends on the concentration of charged particles, then why gravity shouldn't? If I would want to reach Earth's core with a projectile, I would concentrate as much mass, as I can, in the smallest possible space. If I would get 10000 tonnes concentrated in a small marble and dropped it on Earth's surface, it could possibly reach the center of planet - but the bigger would be the size, the more force I would need to get through the crust... Did you ever heard about stars or planets, which are orbiting around clouds of interstellar gas? In which direction the attraction is stronger - of a planet towards the cloud, or cloud towards the planet? I would choose the secon option, even if the cloud would have bigger mass, than planet...

Yes, its the distribution of those particles that matter. But also their atomic mass - atom of lead has much more mass and is much densier, than hydrogen. Exactly! And this is why I said this: "If there would be a planetary body, made of liquid water and nothing else, there shouldn't be no pressure towards the center...". Motion and force appear, when there's a differential of any kind - as in nature every difference wants to be nullified. You can as well change the volume and for example compress the particles over smaller space - but it will work only in the case of gases (possibly plasma?). It would be rather hard, if not impossible to compress a rocky planet. You can as well change the energy level of particles, what affects the state of matter and it's distribution, without affecting the mass.

Yes, except the part, which tells, that gravity is oriented towards the center of mass - it won't work, if you're inside a hollow sphere... In an object, which is made of an uniform material, mass is distributed equally, if there's no influence of an external g. field (at least in a sphere)... If there would be a planetary body, made of liquid water and nothing else, there shouldn't be no pressure towards the center...

Ok, but it is also a source of force directed towards it. Outside the g. field of Earth this force can be measured. If every particle of matter is a source of this force, then it's obvious, that the larger is the number of particles in a specified area, the stronger is the force...

Yes. Weight is a force, produced by gravity of Earth. But doesn't density correlate with momentum? https://www.quora.com/How-are-momentum-and-density-related It's harder to stop a bullet, than a beach ball at similar mass...

And this is, what makes me wonder - how it's possible, that no one didn't think about it. I mean, it's something rather obvious, that a force behaves differently, when it's concentrated in a single point and when it's distributed over some area. If a black hole can be compared to a hole in the rubber sheet, then it's logical, that it's MUCH easier to puncture the material (or fabric of the time-space) with a nail, than with a hammer. You don't need to be a genius, to figure it out... It's the OBJECT, what creates a g. field, not it's center of mass. Inside the object, there's no attraction towards the center and matter is "floating" freely. However a force will appear, if another body will be placed inside the central object - this force can be directed outwards or towards the center of mass, depending on the DENSITY of a body. It's the density, which determines, if object will fall, or will fly up. The most dense objects are always placed in the center of a body and the concentration of matter gets smaller towards the outside. Buoyancy and gravity are created by the same force, which depends on the density, not mass...