Lan(r)12 Posted February 13, 2009 Posted February 13, 2009 Ive read that even a little thimble-full of matter from objects like nuetron stars weigh an ungodly amount on Earth. My question is, can this matter even exist on Earth? Is there a limit to how dense an object can be on this Earth? Thanks for any info
insane_alien Posted February 13, 2009 Posted February 13, 2009 Ive read that even a little thimble-full of matter from objects like nuetron stars weigh an ungodly amount on Earth. My question is, can this matter even exist on Earth? Is there a limit to how dense an object can be on this Earth? Thanks for any info short answer: we don't have a clue. medium answer: we don't have a clue, but its not likely. long answer: we aren't entirely sure why it is stable on an neutron star never mind earth. the matierial is pretty much entirely neutrons as the gravitational pressures have caused the electrons to react with the protons. now, from out experiences in nuclear technology, we know that neutrons aren't stable outside of atoms, the undergo radioacitive decay fairly quickly. so, this leads us to to a few possible scenarios for making neutronium(the name for neutron star stuff) on earth. 1/ it is stable, but so dense it sinks through the earth like a brick through air and ends up at the core of the planet. 2/ its unstable, would be the most radioactive substance ever to arrive on earth. everything for miles around would likely die within a very short time and secondary radioactivity would also be severe. all the evidence points to 2 so far as we don't see small neutrons stars or anything. 1
Sisyphus Posted February 13, 2009 Posted February 13, 2009 I thought neutronium, assuming it exists, is dependent on the ridiculously strong gravity found in neutron stars.
insane_alien Posted February 13, 2009 Posted February 13, 2009 yep, it is which is why we think that it couldn't exist on earth without first turning the earth into a neutron star.
Lan(r)12 Posted February 13, 2009 Author Posted February 13, 2009 yep, it is which is why we think that it couldn't exist on earth without first turning the earth into a neutron star. that does make sense...i couldnt possibly see how something tht heavy could exist here. Thanks for your help
timetes Posted February 13, 2009 Posted February 13, 2009 Ive read that even a little thimble-full of matter from objects like nuetron stars weigh an ungodly amount on Earth. My question is, can this matter even exist on Earth? Is there a limit to how dense an object can be on this Earth? Thanks for any info So, what I just read on your question......the answers all seem to be no ..... But not one answered if there is a limit to how dense and object can be on earth? Why would it have to be radio active or like nuetron star? or dangerous? maybe Im not paying attention to the question or answers
SH3RL0CK Posted February 13, 2009 Posted February 13, 2009 Since Neutronium can't exist on earth, the densest matter would then be the densest normal matter. This would be Osmium http://en.wikipedia.org/wiki/Osmium If an atom smasher were able to generate some kind of strange matter, perhaps that would be denser. Of course, this strange matter would have to be stable enough for scientists to determine its density.
swansont Posted February 13, 2009 Posted February 13, 2009 The neutron star material has to have a gravitational attraction sufficient to overcome the degeneracy pressure of the electrons, and force them into the nucleus to combine with the protons and form the neutrons. This keeps the neutrons from decaying, as well. http://en.wikipedia.org/wiki/Electron_degeneracy_pressure The limit where this occurs sets the density of normal matter, and yields a value (according to the white dwarf Wikipedia page) of about a metric ton per cm^3 http://en.wikipedia.org/wiki/Chandrasekhar_Limit http://en.wikipedia.org/wiki/White_dwarf#Composition_and_structure But all of these conditions are due to intense gravity, and not the chemical properties of the material
Mr Skeptic Posted February 15, 2009 Posted February 15, 2009 Might the densest matter on earth be the iron core? I know iron is less dense than osmium, but the iron core is under extreme pressure.
GDG Posted February 16, 2009 Posted February 16, 2009 The densest material found on Earth is found in every atomic nucleus. OK, so it comes in very small packages, not thimblefuls: it's still the same stuff
Lan(r)12 Posted February 18, 2009 Author Posted February 18, 2009 Might the densest matter on earth be the iron core? I know iron is less dense than osmium, but the iron core is under extreme pressure. Yeah, what about that? You make a good point...
falcon9393 Posted February 18, 2009 Posted February 18, 2009 I am not sure but i will take a wack at it My guess is carbon based structures such as Fullerenes: Graphite and Diamonds:confused:
insane_alien Posted February 18, 2009 Posted February 18, 2009 I am not sure but i will take a wack at itMy guess is carbon based structures such as Fullerenes: Graphite and Diamonds:confused: they aren't all that dense at all. lead is denser. a quick google reveals estimates of the cores density to be somewhere about 13000kg/m3 http://pubs.usgs.gov/gip/interior/
Mr Skeptic Posted February 18, 2009 Posted February 18, 2009 a quick google reveals estimates of the cores density to be somewhere about 13000kg/m3 http://pubs.usgs.gov/gip/interior/ Ah, so the earth's core is about half as dense as osmium (13000 kg/m3 vs 22610 kg/m3).
Lan(r)12 Posted February 19, 2009 Author Posted February 19, 2009 Ah, so the earth's core is about half as dense as osmium (13000 kg/m3 vs 22610 kg/m3). What is osmium? Is it synthetic? A naturally ocurring substance? Organic or inorganic?
insane_alien Posted February 19, 2009 Posted February 19, 2009 Its an element, naturally occuring and metal. google or wikipedia could have told you this.
Lan(r)12 Posted February 20, 2009 Author Posted February 20, 2009 Its an element, naturally occuring and metal. google or wikipedia could have told you this. im currently boycotting all search engines lol why exert unnecessary energy when you all can just tell me?
npts2020 Posted February 21, 2009 Posted February 21, 2009 im currently boycotting all search engines lolwhy exert unnecessary energy when you all can just tell me? You don't need a search engine to find wikipedia.
UC Posted February 21, 2009 Posted February 21, 2009 im currently boycotting all search engines lolwhy exert unnecessary energy when you all can just tell me? That's the single most annoying thing I've heard in a while. A forum is generally where to ask stuff that you can't figure out elsewhere or need better insight that the internet fails to provide. You're wasting everyone's time. Also, you could have typed in everything you need to get to that wikipedia article in less words than it took to make that post.
Lan(r)12 Posted February 25, 2009 Author Posted February 25, 2009 That's the single most annoying thing I've heard in a while. A forum is generally where to ask stuff that you can't figure out elsewhere or need better insight that the internet fails to provide. You're wasting everyone's time. Also, you could have typed in everything you need to get to that wikipedia article in less words than it took to make that post. lol wow Ive read it...I didnt think anyone would take that seriously....but there are things called OPINIONS that people have...even on established scientific fact. Thats what I was searching for. Run along now, theres a good boy.
timetes Posted March 2, 2009 Posted March 2, 2009 so apparently lead is the most dense material on earth. So that means no lasers or infra red can go throught this material. I remember watching on TV the Russan ship that was at the bottom of a sea.......all died in this accident. But I thought they were able to see through the Lead ship? hmmmm, cant build a house with lead! Im talking security and privacy here.
insane_alien Posted March 2, 2009 Posted March 2, 2009 so apparently lead is the most dense material on earth. So that means no lasers or infra red can go throught this material. I remember watching on TV the Russan ship that was at the bottom of a sea.......all died in this accident. But I thought they were able to see through the Lead ship? hmmmm, cant build a house with lead! Im talking security and privacy here. lead isn't the densest, iridium and osmium are(its debatable which is denser as they are so close. and it is ever so slightly variable). lasers and infrared can't go through a block of steel or aluminum either so i don't know why you are suggesting its a property of density. i also don't recall any ships being made of lead, even russian ones.
Sisyphus Posted March 2, 2009 Posted March 2, 2009 Lasers can't go through anything you can't see through (like a piece of black paper), because it's visible light. Various materials are opaque to various frequencies. You wouldn't make a ship out of lead because it's so weak and heavy, but I'm assuming a nuclear sub would have a fair amount of lead on board surrounding the reactor.
npts2020 Posted March 2, 2009 Posted March 2, 2009 Lasers can't go through anything you can't see through (like a piece of black paper), because it's visible light. Various materials are opaque to various frequencies. You wouldn't make a ship out of lead because it's so weak and heavy, but I'm assuming a nuclear sub would have a fair amount of lead on board surrounding the reactor. Yep, and even more around one on an aircraft carrier (bigger reactors) but afaik that is the only place any ship has large lead components.
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