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Author Topic: What Is The Densest Thing On The Planet ?  (Read 11566 times)

Offline neilep

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What Is The Densest Thing On The Planet ?
« on: 27/03/2011 20:57:49 »
Dearest Peeps Of Incredible Knowledge Puissance !

As a sheepy, my woolly coat  is of course so light and fluffy so much so that if it were not attached to me it would just float away. It's also the reason why I look like a cloud with legs.

However, take a look at a neutron star that I made earliertoday.



A neutron star that I made earlier today.


Now then, neutron stars are like well dense, they are so dense that a teaspoon of neutron star stuff would weigh like a zillion tonnes or something !..now that's a lot.....even more than wifey's omelette's (but not much more)


What I would like to know is .........setting aside my own neutron star...........What Is The Most Densest Thing On Planet Earth ?

How dense is it ?


I'm hoping ewe can tell me because this site offers this service free of charge....which is nice !!



Hugs & shmishes


mwah mwah mwah !!



neil
Are My Dents Dense ?
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Offline Geezer

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What Is The Densest Thing On The Planet ?
« Reply #1 on: 27/03/2011 21:21:22 »
Platinum is extremely dense, but I think Osmium (presumably named after Donny) is the densest.
 

Offline JP

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« Reply #2 on: 27/03/2011 21:23:31 »
If you're not talking about large objects, then probably an electron or some similar subatomic particle.  When these particles form atoms and then matter, most of that matter is empty space, so it's not nearly as dense.

Actually, neutron stars get so dense because this empty space has been collapsed away through the force of gravity.
 

Offline Geezer

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« Reply #3 on: 27/03/2011 21:33:28 »
JP, what about photons? They are kinda small, and they have a sort of mass too, or would that not work?
 

Offline CliffordK

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« Reply #4 on: 27/03/2011 21:55:41 »
If you considered just the density of a single atomic nucleus, then you would approach that of a neutron star.  However, when looking at multiple atoms then you would have to look at crystal or liquid densities...  here is a list of elements from Wikipedia.  There is some dispute on whether Osmium or Iridium should top the list.

http://en.wikipedia.org/wiki/List_of_elements

Osmium   (Os)   22.61 g/cm3
Iridium   (Ir   22.56 g/cm3
Platinum   (Pt)   21.46 g/cm3
Rhenium   (Re)   21.02 g/cm3
Neptunium   (Np)   20.45 g/cm3
Plutonium   (Pu)   19.84 g/cm3
Gold   (Au)   19.282 g/cm3
Tungsten   (W)   19.25 g/cm3
Uranium   (U)   18.95 g/cm3
Water   (H2O)   1 g/cm3

It is possible that there would be some metallic alloy of the above materials that would have a slightly greater density.

The Sun, and Jupiter, both have high density plasmas (I think).  But, I don't believe they naturally occur on Earth.  Some plasma is created with electrical arcs.
 

Offline CZARCAR

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« Reply #5 on: 27/03/2011 22:43:59 »
the core of the earth?
 

Offline peppercorn

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« Reply #6 on: 27/03/2011 23:44:34 »
JP, what about photons? They are kinda small, and they have a sort of mass too, or would that not work?
Really? That's news to me!
...
Although I just read "Photons inside superconductors do develop a nonzero effective rest mass; as a result, electromagnetic forces become short-range inside superconductors." on
http://en.wikipedia.org/wiki/Photon#Experimental_checks_on_photon_mass
- not that I understand that I have to say!


Neil - I'm going to postulate that some of that, like, really DARK chocolate cake you can get in only the POSHEST restaurants would qualify! :D
 

Offline neilep

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« Reply #7 on: 28/03/2011 12:02:43 »
Platinum is extremely dense, but I think Osmium (presumably named after Donny) is the densest.

oooh !..thanks Geezer .I have nice platinum ring...people are always surprised how heavy it is ! Can I get a ring made from Osmium ?
 

Offline neilep

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« Reply #8 on: 28/03/2011 12:05:48 »
If you're not talking about large objects, then probably an electron or some similar subatomic particle.  When these particles form atoms and then matter, most of that matter is empty space, so it's not nearly as dense.

Actually, neutron stars get so dense because this empty space has been collapsed away through the force of gravity.

Thanks JP..I guess I was talking about all kind of things here on Earth......I was wondering if there was a human made relly dense thing..and what it might be used for !....fascinating about the electrons though and the nature of void-of-space in a neutron star !
 

Offline neilep

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« Reply #9 on: 28/03/2011 12:08:14 »
If you considered just the density of a single atomic nucleus, then you would approach that of a neutron star.  However, when looking at multiple atoms then you would have to look at crystal or liquid densities...  here is a list of elements from Wikipedia.  There is some dispute on whether Osmium or Iridium should top the list.

http://en.wikipedia.org/wiki/List_of_elements

Osmium   (Os)   22.61 g/cm3
Iridium   (Ir   22.56 g/cm3
Platinum   (Pt)   21.46 g/cm3
Rhenium   (Re)   21.02 g/cm3
Neptunium   (Np)   20.45 g/cm3
Plutonium   (Pu)   19.84 g/cm3
Gold   (Au)   19.282 g/cm3
Tungsten   (W)   19.25 g/cm3
Uranium   (U)   18.95 g/cm3
Water   (H2O)   1 g/cm3

It is possible that there would be some metallic alloy of the above materials that would have a slightly greater density.

The Sun, and Jupiter, both have high density plasmas (I think).  But, I don't believe they naturally occur on Earth.  Some plasma is created with electrical arcs.

Thank ewe very much CliffordK. I also appreciate the wiki link . Yep..seems Iridium and Osmium need to battle it out in some arena somewhere !
 

Offline neilep

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What Is The Densest Thing On The Planet ?
« Reply #10 on: 28/03/2011 12:09:37 »
the core of the earth?

That's a good point !  Thanks CZARCAR......I can imagine it being quite dense indeed !
 

Offline neilep

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« Reply #11 on: 28/03/2011 12:15:47 »
If you're not talking about large objects, then probably an electron or some similar subatomic particle.  When these particles form atoms and then matter, most of that matter is empty space, so it's not nearly as dense.

Actually, neutron stars get so dense because this empty space has been collapsed away through the force of gravity.
JP, what about photons? They are kinda small, and they have a sort of mass too, or would that not work?
Really? That's news to me!
...
Although I just read "Photons inside superconductors do develop a nonzero effective rest mass; as a result, electromagnetic forces become short-range inside superconductors." on
http://en.wikipedia.org/wiki/Photon#Experimental_checks_on_photon_mass
- not that I understand that I have to say!


Neil - I'm going to postulate that some of that, like, really DARK chocolate cake you can get in only the POSHEST restaurants would qualify! :D

Ewe could always order some of this if ewe can't afford the posh restuarants    http://www.mariniscandies.com/product/BACON-01/ChocolateCoveredBacon.aspx
 

Offline GlentoranMark

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What Is The Densest Thing On The Planet ?
« Reply #12 on: 28/03/2011 13:55:00 »
the core of the earth?

That was the first thing I thought of as well but then I thought about Ben's Braincells  ;D
 

Offline JP

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« Reply #13 on: 28/03/2011 20:09:23 »
JP, what about photons? They are kinda small, and they have a sort of mass too, or would that not work?
Really? That's news to me!

I think it was lightarrow who pointed out a while back that if you put photons in a mirrored box, then the box would appear to gain mass, even though the photons didn't have it.  (Apologies if I'm misattributing this.)  This is due to their energy and momentum, and since there's mass-energy equivalence, you could just talk about photon energy density instead of mass.

To take a bit of a detour, that also brings up a interesting point.  Neutron stars don't get any denser because they're made of Fermions, which can't sit a the same point, so they have to stack up, even if there is no empty space between them.  Photons and other force-carrying particles are bosons, so they can stack up.  But I don't think you could approach energy densities equivalent to the energy density of a neutron star, at least not on earth, since neutrons have actual mass and E=mc2 means a tiny bit of mass gives a huge amount of energy.
 

Offline lightarrow

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« Reply #14 on: 30/03/2011 17:54:45 »
JP, what about photons? They are kinda small, and they have a sort of mass too, or would that not work?
I hope you are joking :)
Photons are not point particles, they are delocalized into all the space where is present the EM field.
 

Offline lightarrow

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« Reply #15 on: 30/03/2011 18:02:39 »
But I don't think you could approach energy densities equivalent to the energy density of a neutron star, at least not on earth, since neutrons have actual mass and E=mc2 means a tiny bit of mass gives a huge amount of energy.
Right, even because such energy density with photons would mean an incredibly high pressure, not sustainable with anything presently known.
 

Offline yamo

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« Reply #16 on: 30/03/2011 18:15:40 »
Kansas

 

Offline Supercryptid

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What Is The Densest Thing On The Planet ?
« Reply #17 on: 31/03/2011 03:29:17 »
I might hazard a guess that the moments where particles impact one-another in particle accelerators would represent states where the density is higher than anywhere else on Earth.
 

Offline CliffordK

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« Reply #18 on: 02/04/2011 20:44:43 »
the core of the earth?

That's a good point !  Thanks CZARCAR......I can imagine it being quite dense indeed !

Earth's core is mainly Iron, and other "ordinary" elements.

Estimates are that the inner core is around 12 to 13 g/cc, so much less than even gold.

http://jersey.uoregon.edu/~mstrick/AskGeoMan/geoQuerry57.html

The core of the sun is capable of making plasma, and thus has a greater density of about 160 g/cc.

I believe that Jupiter may also have a plasma core at high density, but I'm having troubles finding good estimates of the actual density.
 

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What Is The Densest Thing On The Planet ?
« Reply #18 on: 02/04/2011 20:44:43 »

 

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