[padam dwivedi]

As earth is also a magnet and we know that magnetic property decreases due to heating so why earth magnetic property means gravity does not decreases

[joypulv]

Magnetism and gravity are separate properties. Try the sites below.

Q & A: Gravity vs. Magnetism | Department of Physics | University of Illinois at Urbana-Champaign
http://www.physlink.com/education/askexperts/ae472.cfm

Of course maybe you can be the one to answer the theory of everything.
Here's a little bit of observation I got off another site:

What can be observed: Gravity
- Mass has or causes a gravitational field in and around the space it's in.
- It costs no energy to maintain the force field.
- Gravity is a weak force, relative to other forces. It takes the mass of the whole earth to produce 1G on a small stone, while a simple string can carry that stone. The forces that keep molecules together are so much stronger than gravity.
- A planet has no gravity poles (like magnets have a north and south pole)
- The stronger the force of gravity in an area, the slower speed of time goes there.
- The gravitational field penetrates every known material. There is no known way to shield gravity. Although some have claimed a reduction of between 0.5 to 2% in weight, above fast rotating superconductors.
- Gravity can bend the path of light.
- A gravitational field reaches very far. No limit of distance is known.


What can be observed: Magnetism
- A permanent magnet uses no energy to maintain its force field.
- A flow of electrons creats a magnet field.
- A magnet has poles (north & south). A magnetic monopole is not know yet.
- An electro magnet uses energy to maintain its force field, unless it's a superconducting one (?).
- When shutting of the power to an electro magnet, the force field collapses, which produces an electric current while collapsing.
- Even atoms have tiny magnetic fields.
- A permanent magnet can be made by aligning the spin of hot atoms, in a magnet field, and then freezing their positions, by cooling.
- Not all atoms are attracted a magnetic force field.
Part of the energetic system of an atom, are one or more electrons. Electrons can be on their own also. A stream of electrons we call an electric current. When an electric current flows, it creates a magnetic field. This is easy to prove with a compass (that contains a permanent magnet)
As long as the current flows, there is a magnetic field. Less people know that it costs energy to create a magnetic field, and that when turning of the power, the field collapses and produces power.

[joypulv]

https://www.facebook.com/photo.php?f...5507306&type=1