Can you explain how Density and Gravity are related?

Answer 1

Simple:
The more mass of the object (that's density, and volume) the more potential gravity it will have:

http://strategy.sauder.ubc.ca/head//gravity.pdf

Answer 2

Gravity is caused by mass. Double the mass and you double the gravity. But gravity also depends on distance. Cut the distance in half and you quadruple the gravity. Now distance is to the center of mass. In the case of Earth is is distance from the center of the Earth, not height above the surface that counts. Where density comes in is that for low density objects, the surface is farther from the center of mass, so gravity is limited by how close you can get without hitting the surface. Denser objects allow you to get closer to the center of mass. The limit to that is a black hole. If all the mass of the Earth were compressed into a 10 foot ball so that you could get within 5 feet of the center of mass, gravity there would be so strong it would be a black hole! But note that the gravity of that black hole at a distance of 4,000 miles from the center of mass, which is where the surface of the Earth is now, would be the same as we have on the surface of the Earth now!

Answer 3

There are different kinds of density: the two most common are weight density and mass density.

Mass density is not affected by gravity, it is what it is, whether on earth, in space or on the moon.

Weight density IS affected by gravity, as weight is mass * g (acceleration due to gravity)

Answer 4

Density is mass per volume

For instance, there are two boxes of the same materials and sizes
-put 50 marbles in box A
-and 100 marbes in box B
Box B is said to be with higher density than Box A, or B is with more marbles than A.

Since B is with more marbles than A, then B is heavier than A because of the greater mass pulled towards earth. Gravity is the force that attracts the mass towards another mass.

Answer 5

A measure of the force that gravity pulls on an object is that object's mass (often mistakenly called weight). Density is a measure of an object's mass in relation to it's volume (mass / volume). Thus, density is related to gravitational pull.

Answer 6

Higher density means more mass per volume, and higher intensity gravity at the surface.

Answer 7

Simply put, the denser an object, the more matter it contains:

* In terms of General Relativity: The more the object warps space.

* In terms of Newtonian Physics: the greater the gravitational field (force) between the object and another object.

Notice that General Relativity does not require a 2nd object, while Newtonian Physics does.

In General Relativity, the object warps space in and of itself.

In Newtonian Physics, the force is given by the equation:

F = G M1M2/d**2

If there is no 2nd mass, there is no force. IMHO, this is where Newton blew it.