Is gravity high or low at the center of the earth?

Question

Magnets die at high temperatures. So what's sustaining our magneotsphere?

Answer 1

If you managed to get to the centre of the earth (and please note that
travelling to the centre of the earth is not recommended for health reasons
- it is so hot that you would catch fire and be compressed by the enormous
pressure) you would be pulled equally in all directions at once...but you
would experience it as being weightless.

When I tell you that you would be pulled in all directions at once you
probably think of your arm being pulled one direction and your legs in
another and you head being pulled in entirely different direction. This
would not happen. Instead every tiny bit of your body would be pulled
equally in all directions at once and the forces would cancel each other
out. You would feel weightless because you cannot sense that there are
these competing forces which are cancelling each other.

In conclusion, if you go to the centre of the earth you will catch fire,
get squashed and will get space sickness because of the unusual sensation
af weightlessness.

Magnetic fields are produced by the motion of electrical charges. For example, the magnetic field of a bar magnet results from the motion of negatively charged electrons in the magnet. The origin of the Earth's magnetic field is not completely understood, but is thought to be associated with electrical currents produced by the coupling of convective effects and rotation in the spinning liquid metallic outer core of iron and nickel. This mechanism is termed the dynamo effect.

Answer 2

There is no gravity at the center of the earth. On average no matter which way you look, you see the same matter. What pulls up is cancelled by what pulls down but there is tremendous pressure from all the matter around you. The earth's magnetic field is caused by the flow of all the metal in the core. A lot of it is ionized and moving charge makes for a magnetic field. The earth is not a permanent magnet; it's an electromagnet.

Answer 3

If there were a spherical hole in the middle of the earth, and somehow you were confined in it, you would be pulled in every direction surrounding you. The more massive an object, the more gravity creates. With uniform (or close to uniform) mass surrounding you in every direction.... I dont really know what would happen. perhaps you would experience 0 gravity if you were exactly in the middle. Our magnetosphere is hypothesised to be created by the motion of the liquid outer core, surrounding the solid inner core. Both supposedly metal, one liquid, one solid. I dont know the exact details, but this liquid moving around the solid creats a magnetic field.... Magnets die at high temperatures yes, and then remagnetize to the current pole once they solidify.

Answer 4

There's no significant difference in gravity between the surface and the center of the earth.
Magnets are another matter.