If density decreases does mass decreases?

Answer 1

Not neccessarily, density is measured by M/V mass divided by volume this means that the density will decrease if the volume is raised and the mass stays the same or if the mass is lowered and the volume stays the same. It depends on your situation. So really the answer to your question is both yes and no!

yeah well that's not my question!!!

Answer 2

No mass increases as density increases because the formula for density is density= mass/ volume. In a fraction, if the numerator increases, then the end product increases. So in the density formula, mass is the numerator and directly correlates with the density.

Answer 3

The answer is ambiguous: an increase in mass can come with a density increase or decrease.

Mass is how much 'stuff' an object has; density is how much mass there is in a given volume. Without knowing how much (or even whether) volume is added to an object along with its mass, it is impossible to say whether density will increase or decrease.

Take the situation of a terrestrial planet (a planet that is rocky). If the planet has a makeup similar to our current terrestrial planets (Mercury, Venus, Earth and Mars) and you added a significant mass of a dense material such as, say, uranium, then the overall density of the planet would increase. If, however, you added a significant mass of, say, hydrogen, and could somehow keep that hydrogen on the planet (and not compressed in a canister but free-floating in its atmosphere) and you included the planet's atmosphere in computations of its density, then you would have decreased the planet's overall density.

In general, if you have a homogeneous object, such as an ingot of pure iron, and you simply added more of the same to the object (you melt more iron and add it to the existing ingot), the overall density will be virtually the same until you reach astronomical proportions and have an iron ingot that is so massive that it generates its own significant gravitational field; as this happens, eventually gravity will start to compress the material and make it denser. This happens continuously, so technically it happens when you add just a small amount of iron to a small ingot, but at such a scale the gravitational effect within the iron ingot is so minute, it can be ignored at normal scales for all practical purposes.

Answer 4

No, and here is an example why. Suppose the earth could be compressed down to the size a ping pong ball. At this density, the escape speed would exceed the speed of light and therefore be classified as a black hole. But, even at this size and density it would still rotate around the sun (sun doesn't care how big the earth is) and the moon would still do it's thing because it doesn't care how big the earth is either. The only thing that the sun and moon (and the earth, of course) care about is the mass.

However, two objects that have identical volume (size) but different densities will have different masses; the object that has the higher density will have the higher mass (and generate a stronger gravitational field).

Answer 5

It doesn't, density increases as mass increases if the volume remains the same.

Mathematically, density=mass/volume. If the mass increases but the volume stays the same, the density will increase.

Intuitively, the more dense an object, the more matter is contained inside it relative to its size. So if you pack more stuff (mass) inside a space, but without allowing the space to expand, you increase its density.

On the other hand, if you are allowing the volume to change and as long as you are adding the same material, the density will remain constant while both the mass and the volume will increase.

In Astrophysics, as objects get more massive, the density decreases, due to the linear proportions of mass to density. This is probably what the question is referring to.

Answer 6

No, mass does not necessarily decrease if density decreases. Mass is a measure of the amount of matter in an object, while density is a measure of how tightly packed that matter is within the object. So, changing the density of an object does not necessarily change the amount of matter in it.

Answer 7

when density increase mass also increases. sheu

Answer 8

well d=m/v so as mass decreases, so does density.

Answer 9

Density also decreases.