Is density directly proportional to mass?

Answer 1

No.

It is important to realize that they are different. Many physical properties depend on this distinction. The mass of a sponge may be small but it has a gigantic area.

This is a doubt....by Niranjanrbharati (DP stands for Directly proportional)

Presssure=thrust/area

=>P x A =T

=>T (DP)A

As Thrust is Force

Thrust=Mass x g

A (DP) m x g

A(DP)m

If the calculation is right isnt mass Directly prop. to Area?????

(edit the answer below)

Answer 2

As most people know, the elements of the Periodic Table have a certain mass. Again, as most people know, this is because elements are composed out of fundamental parts called protons and neutrons (and ofcourse - electrons, though these are almost insignificant in relation to protons and neutrons). Ofcourse, protons, neutrons and electrons also have an 'area', the place they take in the universe. So far so good, elements are made of the same matter, which means they would be equally heavy (since the more protons, neutrons, and electrons they consist of would both increase their area and their mass in equal proportions). However, it is not that simple. Actually, it all depends on a great number of factors, the following: First of all: their Van der Waals-radius, atomic radius or other radius. Atoms are tiny little cores of neutrons and protons, and around these cores, electrons that move in a circular area around this core. Unfortunately, when two atoms are compressed to each other, they cannot near each other closer than the radius, or they bind in a chemical compound. So, theoretically, a chemical compound that exist purely of, for example, carbon, the closest state of the atoms would be still a radius away from each other. Theoretically this is possible, however it has never been done. Practically, atoms form some kind of geometry, which takes more 'area'. So, ofcourse, elements with the same core mass, but a bigger radius would make 'lighter' compounds than elements with a smaller radius. For more information about this, consult Wikipedia. Secondly: the kind of chemical bond. Thirdly: the aggregation state (liquid, solid or gaseous). And as such you can go on. So the answer isn't as straightforward as you would think. Currently, even the greatest scientist would have to think about this answer. Because some rules just don't apply in the universe. You could say that iron and nickle are the 'heaviest per area', because we see that very heavy objects (such as the earth core) exist out of solid iron and nickle. But this doesn't count when you look at objects such as black holes and neutron stars, where gravitation (and mass per area) gets to such high levels, that even iron and nickle are way too light. A mug of anything here would weigh about three tons on a neutron star. A bit more than a mug of solid iron or nickle. So, really, there is no objectively definable relation. The only thing that counts is that matter has a mass and a volume, and that these create a gravitational field.

Answer 3

yes density=mass/volume which means density is directly proportional to the mass while it's inversely proportional to the volume :)

Answer 4

No, that sounds as if the mass of any object increases with time. The Law of Conservation of Mass states that a mass remains constant, if there is no interaction with other objects.