Density is defined as the mass per unit volume of a substance.
Questions tagged [density]
961 questions
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What is the relation between density and average distance to nearest neighbour?
Let's say I have the density of an object: say, $1 \space \mathrm{obj} \space m^{-2}$. This could, for example, be the number of balls on a football field. If we assume the objects are uniformly distributed, what is the average distance between an…
Allure
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Separation by density
How can i separate water vapour from a mixture of gases given that water vapour has a lower density than the gases?
I am doing an experiment on separating water vapour from exhaust gases. I have not tried anything yet. I am not sure on how to get…
Krubel
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Why do denser things sink? Detailed justification needed
I would like a detailed explanation and justification if possible regarding the topic. I would like to know what happens at an atomic level. Most of the answers I have found were very basic and did not explain it thoroughly enough. What I have…
Ziiil
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Is there an upper theoretical density limit?
Is there an upper theoretical density limit - density being mass in a finite volume, and the part consisting mass has also some finite volume, just with large space in between (particles, atoms, ...).
Is there a theoretical limit how dense can…
Rook
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Density in solid angle $\Omega$ convert to spherical angles $\theta$ and $\phi$
I was given a probability density $$ \frac{dP}{d\Omega} $$ where $\Omega$ is the solid angle such that $$ d\Omega = \sin \theta \ d\theta \ d\phi $$ and $\theta$ and $\phi$ the sperical coordinates angles. To obtain the probability we calculate the…
user171780
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Would Oscars made of pure gold bend?
Since gold is often considered "soft": If the Oscars were made of pure gold (instead of gold-plated britannium), would they bend (deform) over time?
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What Solid/Liquid will become more dense as it gets colder
I am trying to find a chemical that is similar to spermaceti. A substance that becomes more dense in transition from a liquid to a solid, and conversely the opposite when heated to become a liquid.
I can't buy spermaceti so i need something similar.…
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Does the average density of a ball affect its bounce height?
I'm in the IB program in my high school, and we are doing an internal assessment in physics. It must be about some physical property of a bouncy ball. I decided to determine how the average density of a ball affects its bounce height. Does density…
Phlebas
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Possible Rock Density Determination Method
I am trying to do density determinations on a large number of individual rock samples. I know the standard dry weight - wet weight methods but have an idea that might be better.
I can buy a completely water proof digital scale. My question is this…
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How can the mass of a teaspoonful of nuclei be equal to the mass of all the people on the earth?
In our topic regarding density, a calculation was shown where the mass of one teaspoonful of nuclei was equal to the mass of all the people on the Earth. I understood the calculation, but couldn't understand why it is so. It just doesn't make sense!
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Which system has the higher density (mass per unit volume): dry or humid air?
I wonder if wet and dry air have the same density, I think they must have the same because both are "air" however, if we set both with the same pressure and temperature to try to standardize the other variables, is it true? that? I think so, but…
OscarR
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How to find the relative density of a solid soluble in water?
I know what is relative density and how to find it, but what I can't understand is how do I find relative density of something soluble in water like salt?
Since, relative density is with respect to density of water, if I replace the water with some…
S Roy
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Why the liquids that are denser, place lower than those who have lower density?
can somebody explain Why the liquids that are denser, place lower than those who have a lower density from a macroscopic and microscopic point of view??
Amin
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Energy transfer by a rotating disk at a constant RPM
Does Energy transfer from a rotating disk at a constant RPM into ambient fluid depend on disk material density?
Why?
kuki
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Non-invariance of density extrema with re-parameterization
Consider a density function $f(x)$, in one dimension for simplicity. Assume that it has an extremum at $x^*$, so that $f'(x^*) = 0$.
If I make a change of variables via $x = x(\xi)$, then I must consider the transformed density:
$$g(\xi) =…
a06e
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