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# GRAVITATION WAT IS THE GRAVITATIONAL POTENTIAL AT CENTRE OF EARTH

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Not so fast my friend, Earth's Gravity is nill at the core, but there still exists the gravitation pull of the moon, sun, etc. and so on.

Posted on Oct 19, 2008

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Posted on Oct 02, 2008

Hi,
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Posted on Jan 02, 2017

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## Related Questions:

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You will be lighter on the moon than on earth because the gravitational pull is different on the moon than on earth. That gravitational pull difference will make the weight different. A 100 lb person will weigh about 16 lbs on the moon.

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### What are some facts about the sun

One million Earths could fit inside the Sun:

If a hollow Sun was filled up with spherical Earths then around 960,000 would fit inside. On the other hand if these Earths were squished inside with no wasted space then around 1,300,000 would fit inside. The Sun\'s surface area is 11,990 times that of the Earth\'s.

Eventually, the Sun will consume the Earth:

When all the Hydrogen has been burned, the Sun will continue for about 130 million more years, burning Helium, during which time it will expand to the point that it will engulf Mercury and Venus and the Earth. At this stage it will have become a red giant

The Sun will one day be about the size of Earth:

After its red giant phase, the Sun will collapse, retaining its enormous mass, but containing the approximate volume of our planet. When this happens, it will be called a white dwarf.

The Sun contains 99.86% of the mass in the Solar System:

The mass of the Sun is approximately 330,000 times greater than that of Earth. It is almost three quarters Hydrogen, whilst most of the remaining mass is Helium.

The Sun is an almost perfect sphere:

There is only a 10 kilometre difference in its polar diameter compared to its equatorial diameter. Considering the vast expanse of the Sun, this means it is the closest thing to a perfect sphere that has been observed in nature.

Light from the Sun takes eight minutes to reach Earth:

With a mean average distance of 150 million kilometres from Earth and with light travelling at 300,000 kilometres per second, dividing one by the other gives us an approximate time of 500 seconds, or eight minutes and 20 seconds. Although this energy reaches Earth in a few minutes, it will already have taken millions of years to travel from the Sun\'s core to its surface.

The Sun travels at 220 kilometres per second:

The Sun is 24,000-26,000 light years from the galactic centre and it takes the Sun 225-250 million years to complete an orbit of the centre of the Milky Way.

The distance from the Sun to Earth changes throughout the year:

Because the Earth travels on an elliptical orbit around the Sun, the distance between the two bodies varies from 147 to 152 million kilometres. The distance between the Earth and the Sun is called an Astronomical Unit (AU).

The Sun is middle-aged:

At around 4.5 billion years old, the Sun has already burned off about half of its store of Hydrogen. It has enough left to continue to burn Hydrogen for approximately another 5 billion years. The Sun is currently a type of star known as a Yellow Dwarf

The Sun has a very strong magnetic field:

Solar flares occur when magnetic energy is released by the Sun during magnetic storms, which we see as sunspots. In sunspots, the magnetic lines are twisted and they spin, much like a tornado would on Earth.

The temperature inside the Sun can reach 15 million degrees Celsius:

At the Sun\'s core, energy is generated by nuclear fusion, as Hydrogen converts to Helium. Because hot objects generally expand, the Sun would explode like a giant bomb if it weren\'t for its enormous gravitational force.

The Sun generates solar wind:

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This being said, there are individual spots in the corona of the sun which from time to time is known to be hotter than the core. The corona is an outer atmosphere of the sun (if you see a picture of a solar eclipse, the corona is typically the edge of the sun not covered by the earth).

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### Which is the lightest metal that acts opposite to gravity ?

It is not possible for any metal (or anything for that matter!) to act opposite to gravity.
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### Gravitational force goes on decreasing towards the center of the earth.why?

If a free body could be positioned at decreasing distances from the center of the earth, the mass of the earth would become more distributed around the free body, until at the very center of the earth the net gravity on the body would be zero. At this point the mass of the earth (and the force of gravity) would be uniformly distributed in all directions.

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