What happens when the gravity of a massive star is able to overcome neutron degeneracy pressure?
Q. a. The core contracts and becomes a white dwarf. b. The core contracts and becomes a ball of neutrons. c. The core contracts and becomes a black hole. d. The star explodes violently, leaving nothing behind. e. Gravity is not able to overcome neutron degeneracy pressure.
Asked by Dion Maravoloso - Sun Apr 12 03:04:23 2009 - - 2 Answers - 0 Comments

A. The maximum mass of a neutron star is given by: - ... / M(max) = |8 f(n)| . 1.85.M(sun) ... |___| ... | .. 9 . | Where f(n) is a dimensionless length parameter (for ordinary nuclear matter f(n) 0.9). Thus, in neutron stars of 3.0.M(sun) - 5.0.M(sun) the gravity of the massive star is able to overcome neutron degeneracy pressure at the core. The star collapses and gravity strengthens and the star enters a region of space-time called a black hole. Thus, the answer to your question is --- c.
Answered by . - Sun Apr 12 08:35:11 2009

What would happen if our sun were to suddenly transmute into a neutron star?
Q. What would happen if our sun were to suddenly (and inexplicably, of course) transmute into a neutron star? What would happen to the Earth?
Asked by The Nomad Yokai - Thu May 22 04:11:15 2008 - - 4 Answers - 0 Comments

A. Life on Earth would end in a massive and sudden ice age. The Earth would no longer be getting the amount of illumination it now gets, temperatures would plunge, plants and animals would die, our planetary ecosystem would collapse.
Answered by Stephen A - Thu May 22 04:16:54 2008

How can neutron stars have a magnetic field?
Q. I've read that the neutron stars have incredibly strong magnetic fields due to their intense density, temperature, and rotation speed. But how can something completely made up of neutrons, which have a neutral charge, radiate anything even resembling magnetism?
Asked by Thomas K - Fri Jun 27 23:12:43 2008 - - 4 Answers - 2 Comments

A. Good question. Neutron stars are not completely made up of neutrons---they have a crust of reglar matter, mostly iron, a couple meters thick. Even the neutron material is impure and somewhat conductive and can support a magnetic field.
Answered by c - Fri Jun 27 23:25:18 2008

What would happen if a rogue neutron star collided with our sun?
Q. What would happen if a rogue neutron star (average size) traveling at 1% of speed of light collided with our sun? Would it go straight through? Would it cause a supernova?
Asked by RB - Tue Dec 23 08:32:00 2008 - - 2 Answers - 0 Comments

A. Yes, it would go through. The total column of solar material it encountered in its few square kilometers of cross section would be tiny compared to its mass. In the few seconds it would take to go through, it would not accrete much mass, but its surface would be many, many millions of degrees when it came out the other side. It would radiate copiously in gamma rays, enough to sterilize the planets. It might cause a supernova if it got stuck inside the sun, but that won't happen. My guess is that it wouldn't actually do much long-term damage to the Sun. It would wreck havoc with the planets, however.
Answered by c - Tue Dec 23 09:40:58 2008

When a neutron decays radioactively into a proton, what other particle is made?
Q. When a neutron decays radioactively into a proton, what other particle is made? How is relative mass related to this? Thank you!
Asked by L - Thu Sep 30 20:31:33 2010 - - 2 Answers - 0 Comments

A. Don't quote me on this, but; a neutron has a neutral charge, so it would decay into a proton and an electron. A neutron is slightly heavier than a proton, and the mass of an electron is extremely small, so proton + electron = neutron?
Answered by Jet Skypyre - Thu Sep 30 20:34:30 2010

How do you calculate neutron number in an element?
Q. i thought you just subtracted theatomic number form the mass number to get neutron number, but its counted incorrect.how do i get this right?
Asked by negative - Thu Sep 3 17:23:51 2009 - - 1 Answers - 0 Comments

A. Number of protons and neurons should be equal unless it is an isotope. Perhaps you should round the mass to nearest whole number and then subtract it.
Answered by silentelysium - Thu Sep 3 17:28:25 2009

How is neutron stars important to our understanding of space and the earth?
Q. I need help for my science poster of neutron stars. Can u give me some ideas i could write down?
Asked by ii-Happy - Thu Jan 7 00:26:16 2010 - - 1 Answers - 0 Comments

A. A neutron star is a stellar remnant left by a super giant star after exhausting their nuclear fuel core and explode as a supernova. So they are what is born after the death of a super star, universe doesn't disappear, it regenerates itself, expanding and contracting as it has to. The stars behavior is the life recycling itself.
Answered by Joi - Thu Jan 7 01:20:13 2010

What is the acceleration due to gravity on a neutron star?
Q. A typical neutron star has five times the mass of our Sun and a radius of about 10 km. If you were standing on the surface of this neutron star, what would be the acceleration due to gravity there? The mass of the sun is 2.0 * 10^30 kg.
Asked by Lucifer - Sun Feb 7 20:54:56 2010 - - 2 Answers - 0 Comments

A. F = ma for gravity, this is equal to F = mg Set this equal to F = [GmM/r ] mg = [GmM/r ] the "m" cancels g = GM/r plug in the numbers M = 5 x 10^30 kg = 1 x10^31kg g = [ (6.67 x 10^-11 kg m/s m /kg)( 1 x10^31kg) ] / [1 x 10^4 m] Don't have a calculator but that's how you do it anyway
Answered by Sponsored - Sun Feb 7 21:15:00 2010

Which is the energy of a thermal neutron?
Q. Neutrons released by a fission reaction must be slowed by collisions with the moderator nuclei before the neutrons can cause further fissions. Suppose a 1.9-MeV neutron leaves each collision with 66% of its incident energy. How many collisions are required to reduce the neutron's energy to at least 0.040 eV, which is the energy of a thermal neutron?
Asked by physicsstudent - Tue Jan 8 18:49:43 2008 - - 1 Answers - 0 Comments

A. Thermal neutrons usually have an energy of about 0.025 eV; hence, in your case, it is the neutron with 0.040 eV. A "Fast Neutron" usually have energies greater then 1 MeV. Let n = number of collisions 0.04 <= (0.66)^n(1.9 x 10^6) Maximum n = 42
Answered by PhysicsDude - Fri Jan 11 02:49:16 2008

How does a free neutron contain potential energy?
Q. So I know that when a special isotope of hydrogen that contains a neutron fusses with another, that helium is created and a free neutron is released. What I don't understand is how that free neutron can contain potential energy, and how humans hope to one day contain that energy. I assume that that free neutron can be used in additional fusion but how can any present energy be transformed into something like heat energy? Thanks!
Asked by Ultragames - Thu Jan 29 06:43:40 2009 - - 2 Answers - 0 Comments

A. I dunno what potential energy do you mean. I think that free neutron contains energy, but it is KINETIC energy, not potential one. that free neutron also can induce another nuclear reaction, therefore more energy released. and large number of moving neutrons already have heat energy, because heat energy is none other than random kinetic energy of many particles.
Answered by Hanciong - Thu Jan 29 09:52:22 2009

How do you find the neutron to proton ratio?
Q. I have a chemistry test tomorrow and some of the questions involve finding the proton to neutron ration of given elements like tin-134, silver-107, etc. For tin-134, my calculations have told me that the neutron to proton ratio is 1.68 : 1, and for silver-107, 1.28 : 1. However, I have no way of finding out if these are correct, or if I even have to correct way of solving them. Please help me!!!
Asked by Candyce Michelle - Sun May 17 21:15:31 2009 - - 3 Answers - 0 Comments

A. The atomic number is the number of protons. To find the number of neutrons, subtract the protons from the atomic mass The neutron to proton ration or the proton to neutron ratio is found by taking the numbers of each and placing them into a ratio, in either direct that your are asked to compare. With tin-134, the atomic umber is 50, so 50 protons. Subtract to find the neutrons 134-50= 84 for the neutrons. The proton-neutron ratio would be 50 to 84.
Answered by science teacher - Sun May 17 21:30:12 2009

What is the difference between an antineutron and a neutron?
Q. My physic book tells me that the only difference between a positron and an electron is the charge. The same for protons and anti-protons. But a neutron is supposed to be electrical neutral... Whats the difference?
Asked by Panserboeurne - Fri Apr 25 12:36:55 2008 - - 4 Answers - 0 Comments

A. Yes ur right, but its all to do with Quarks and Hadrons. Its unnecessarily complicated. A neutron is a hadron. Every Hadron has an opposite that if it comes into contact with each other, they both will be annihilated. Cant remember exactly th composition of the neutron, but lets say its made of a up quark and 2 anti-down quarks. Yes this is actually the names of the quarks that would make up a neutron. Now the exact opposite charge is required. Cuz th up quark is 2/3 of a charge, an anti-up is -2/3 Th down quark is made of 1/3 charge, so the anti has -1/3 charge. So the neutron is neutral, ok... Now the anti-neutron would be an anti-up and 2 downs. Exactly opposite, but again gives a zero charge. There are equal and the same… [cont.]
Answered by TheOtherDoomGuy - Fri Apr 25 13:51:38 2008

What is the difference between pulsars and neutron stars? If a pulsar is a neutron star, is every neutron star?
Q. What is the difference between pulsars and neutron stars? If a pulsar is a neutron star, is every neutron star a pulsar?
Asked by A S - Sun Jun 27 17:24:00 2010 - - 3 Answers - 0 Comments

A. A pulsar is a rotating neutron star that can produce radiation by spinning its powerful magnetic field through space. (There are also 'accreting pulsars' which funnel matter from a companion star onto their magnetic polar caps as they rotate.) A neutron star uses up a lot of its rotational energy moving its magnetic field around this way, and and so it gradually slows down. When it slows down enough, it no longer radiates very much energy, and so it is no longer considered a pulsar. This usually happens within a few million years. If a neutron star had only a weak magnetic field, it would also not be a pulsar. Most neutron stars in the Universe are old enough and tired enough that they are no longer pulsars. A recent paper estimates a… [cont.]
Answered by arslan - Sun Jun 27 17:24:50 2010

What is the difference between the neutron to proton ratio of certain elements?
Q. What's the difference between the neutron to proton ratio of elements with low atomic numbers compared to elements with large atomic numbers??
Asked by Erendira - Thu Nov 26 14:23:31 2009 - - 2 Answers - 0 Comments

A. As atomic number increases, it takes more neutrons to shield the positive charges of the protons from one another, so the neutron to proton ratio increases.
Answered by jerry758 - Thu Nov 26 14:47:47 2009

How are exoplanets around neutron stars possible?
Q. Quite a few exoplanets have been found orbiting neutron stars. For a neutron star to form, a supernova of the original star is necessary. Wouldn't the supernova destroy the planets orbiting the original star completely? Or are the planets formed after the supernova and after the neutron star has come into existence?
Asked by UniverseSlacker - Thu Oct 1 16:58:42 2009 - - 3 Answers - 0 Comments

A. Supernova's aren't as destructive as Sci-Fi would have you believe, True they are very dangerous and it is basically a massive explosion (and an implosion in the core). However... the density of the gas gets less and less and less as it explodes out from the sun, By the time the gas has reached planets it is quite "diluted" into space. And this makes the shock from the explosion less powerful than it would be if the gas remained the same density. Nebula are the remains of exploded stars... yet if you fly into a nebula you're not going to suddenly get blown apart if you hit some of the gas. This is because the gas has expanded out SO far that it's now lost almost all of it's energy from the explosion (except for it's velocity) So... to… [cont.]
Answered by Clint - Thu Oct 1 17:41:21 2009

If a neutron decays to a proton and an electron, how can a proton decay into a neutron and an positron?
Q. Regarding beta decay, I don't understand how a neutron can turn into a proton and an electron and then that proton can turn back into a neutron. Where does the charge come from that it keeps spitting out?
Asked by Providence - Thu May 15 09:27:27 2008 - - 3 Answers - 0 Comments

A. if you have noticed the weights of these three particles, the neutron is almost the added weight of a proton and electron so a neutron can be split into a proton and electron (theoretically, a neutron is the combination of proton and electron) the net charge is still zero. if the electron is emitted(beta decay) the nucleus acquires an additional unit positive charge a proton, though, cannot be converted into a neutron(theoretically, it can combine with an electron to form a neutron)
Answered by boxieblue - Thu May 15 09:48:30 2008

Can I watch the Jimmy neutron Christmas special anywhere online or youtube?
Q. I wanna see the jimmy neutron christmas special but i dont think its on tv. I looked on youtube but i couldn't find it but maybe u kno of a place where its on youtube or somewhere else online for free? Also do u know of a place where i can watch all the nickelodeon christmas specials?
Asked by Nicnac - Sat Nov 21 19:27:19 2009 - - 1 Answers - 0 Comments

A. I just looked for all the old specials too. I know Doug and Hey Arnold used to be on YouTube, watched them for the last few years, but apparently the commentary on some of the clips say that Viacom (Nickelodeon's parent company) flipped out a couple weeks ago and took off everything that violated copyright. So right now I'm currently looking fo them on other video sites too, I'll let u know if I find anything. I think I'm gonna try LimeWire or BitTorrent as well.
Answered by Vincent A - Mon Nov 23 12:42:11 2009

What is difference between a Black hole, neutron star and a supernova?
Q. I know that they occurs when a star dies but what makes a star to turn into a black hole NOT a supernova or neutron star? If you can, please give me a link where i can see their images and also can know more about them.
Asked by Gaurav - Tue Oct 9 09:02:59 2007 - - 3 Answers - 0 Comments

A. Black Hole: An object with a gravitational field so strong, not even light can escape. Has a mass ranging anywhere from 1.5 solar masses (stellar-mass) to billions of solar masses (supermassive black holes). Now, the density varies just as much. An earth sized black hole would have a density around 2 x 10^30 kg/m^3, while a supermassive black hole (believed to be at the center of most galaxies) would have a density similar to that of water. Neutron Star: Collapsed remnant of a supernova. Has a mass ranging from about 1.35 solar masses to 2.1 solar masses. They typically have densities varying from 8 x 10^13 g/cm^3 - 2 x 10^15 g/cm^3, or about the density of an atomic nucleus. Supernova: Is more or less an exploding star. No one' [cont.]
Answered by McLovin - Tue Oct 9 09:38:54 2007

What are the long term effects of neutron bombs?
Q. A neutron bomb may do a good job if you drop one on a town that is filled with enemy soldiers, but after the radiation kills everybody there does it stick around or cause polllution problems.? Why cant we just take the folks we like out of Bagdad and set a neutron bomb?
Asked by STONER - Thu Jan 24 08:26:26 2008 - - 5 Answers - 0 Comments

A. Because that would be the greatest act of terrorism in the history of mankind.
Answered by Information Police - Thu Jan 24 08:33:40 2008

What property of neutron doesn't allow proton to move or rotate as like electron moves?
Q. Nucleolus having proton and neutron but what property of neutron which does not allow the proton to move as electron are moving around? What kind of glue like property neutron have? Is the weight of proton is responsible ? Then Hydrogen does not have neutron so how the proton of Hydrogen is not moving around as neutron is not available to hold it as in other atom neutron is there to hold proton.
Asked by Kaushil - Tue Jul 21 05:42:06 2009 - - 1 Answers - 0 Comments

A. Protons and neutrons are bound together in the nucleus by what is known as the 'residual strong force'. A neutron is equivalent to a proton combined with an electron. Nuclei (such as the proton in an H atom) do move around; they move faster with higher temperatures. Electrons orbit around the nucleus, which is pretty logical, since protons (and neutrons) weigh about 1836 times as much as electrons.
Answered by dingodevil - Tue Jul 21 06:10:50 2009