if gravity has to hold the water around the earth, then who creates that gravity force?

Answer 1

Gravitons. Larger masses have more gravitons.

http://www.geocities.com/recycling_universe/ed_gravitons.htm

Answer 2

There are four known forces in the natural word.

- electrostatic
- weak nuclear
- strong nuclear

and

- gravitation.

The magnitudes and behavior of these forces have all been determined by experiment.

The force of gravitation exists between two objects that have mass and is proportional to their product and inversely proportional to the square of the distance between them. The is expressed mathematically as

F = mMG/r^2

where m is the first mass, M is the second, G is a measured constant of proportionality and r is the distance separating m and M..

It can be shown that a sphere of constant density acts as if all of its mass were concentrated at its center point. Making those simplifying assumptions for the planet earth and neglecting the depth of the ocean as small compared to the earths radius you can compute the amount of force the earth exerts on the ocean (and the ocean exerts on the earth). This would be the weight of all the water in the sea.

See this link for a discussion and estimate of the earth's total mass.

http://hypertextbook.com/facts/2002/SamanthaDong2.shtml


Who 'creates' the force is probably a question for a category other than physics

Answer 3

According to Einstein, Gravity is a phenomenon product of the curvature of the space-time "fabric", caused by large masses such as planets, the Sun, etc. The greater the mass, the greater the gravity. That is why the Sun does not orbit around the Earth, but instead the Earth orbits around the Sun.

Answer 4

every thing creates gravity it depends on how much mass it has that depends on how much it can hold like the earths gravity not only keeps everyting on the earth it allows the moon to rotate around the earth and the moons gravity causes the tides (high and low) on earth, and why all the planets rotate the sun.

Answer 5

Every object which has mass ( just about everything, including your own body ) has a gravitational force. The greater the mass the greater the force.

As the Earth has quite a large mass, it is sufficient to hold the water on its surface.

Answer 6

There is a high iron content inside the crust which is under high pressure. I guess this is responsible for the earth's gravity. But some people have also suggested there could be a nuclear reaction happening down there...

Answer 7

The gravity force is produced by the spinning of the core of the earth... not who but wha should be the question...

Answer 8

The center of the earth.

Answer 9

Its depend on the rotation speed of the earth.

Answer 10

Grandpa says he did it. But then, he's a pathological liar so I'd take that with a grain of salt.