Neutral Definition and 351 Threads

A neutral country is a state that is neutral towards belligerents in a specific war or holds itself as permanently neutral in all future conflicts (including avoiding entering into military alliances such as NATO). As a type of non-combatant status, nationals of neutral countries enjoy protection under the law of war from belligerent actions to a greater extent than other non-combatants such as enemy civilians and prisoners of war.
Different countries interpret their neutrality differently: some, such as Costa Rica, have demilitarized, while Switzerland holds to "armed neutrality" to deter aggression with a sizeable military while barring itself from foreign deployment. However, not all neutral countries avoid any foreign deployment or alliances, as Austria, Ireland, Finland and Sweden have active UN peacekeeping forces and a political alliance within the European Union. The traditional Swedish policy is not to participate in military alliances, with the intention of staying neutral in the case of war. Immediately before World War II, the Nordic countries stated their neutrality, but Sweden changed its position to that of non-belligerent at the start of the Winter War.
There have been considerable changes to the interpretation of neutral conduct over the past centuries. During the Cold War another European country, Yugoslavia, claimed military and ideological neutrality, and that is continued by its successor, Serbia.

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  1. C

    Can Z decay into a neutral pion?

    I wondered if the following decay was possible: \Xi^0 \to \Lambda + \pi^0 The only mechanism I can think of is that a strange quark of the Lambda particle emits a Z and becomes a down quark followed by the Z creating a up-antiup pair. But I'm not sure whether the strange to up transition (by...
  2. T

    Can I share an AC neutral w/ two different voltage requirements?

    I have a situation on a dashboard where the dashboard itself (metal) is the “ground” and two different items require a different voltage. One item requires 5 volts and the other requires 25-28 volts. Each of these items has a single lead. How can I attach two different ac power supplies when...
  3. B

    How does a neutral particle interact with a photon?

    What happens if a photon is collided with a neutral particle? Can it also absorb the photon’s energy like a charged particle, can the photon be reflected, or does the photon just pass through the neutral particle?
  4. I

    Balanced load at home means no current on the neutral?

    I've never read this explicitly, but here is what I've concluded: If you could somehow have a perfectly balanced load on the circuits in your home to each of the 2 hot lines coming into your residence from the pole mounted transformer, this would mean: The neutral wire connected from your...
  5. N

    Spectrum & energy level of neutral hydrogen

    Would like to see if I've understood this question somewhat. :-) Homework Statement A doubly ionised Lithium atom (Li^++) has two of its normal complement of electrons removed. The energy levels of the remaining single electron ion are closely related to those of the neutral Hydrogen...
  6. P

    How to accrete neutral gas after the reionization of the universe?

    Hi, Once the Universe has completed reionization (at redshift >~6 ), the intergalactic medium (IGM) is completely ionized (even if some neutral clumps can persist). On the other hand, it seems that galaxies were accreting a lot of gas from the IGM after reionization so that they could form...
  7. B

    How to incorporate the neutral current into the Dirac equation

    Hi Everyone, I'm a math grad student working on numerical procedures for the Dirac equation, and I'd like to be able to incorporate the neutral current interaction neutrino + fermion -> Z bozon -> neutrino + fermion <- poorly impersonated Feynman diagram into the Dirac equation as a...
  8. K

    Bending Moment & Neutral Axis: Why Not Centroid?

    Hey guys, as the title says I can understand why the neutral axis does not pass through the centroid after reaching a point where the bending moment is max before the beam collapses. Say you have a straight structure supported by two double I-Beams and a weight in the middle. Why does the...
  9. E

    Shorting neutral to Earth confusion

    what will happen if i short neutral ac outlet wire with earth? please see the figure if you have any confusion.
  10. I

    Surface Charge Density of a Neutral Conducting Cube

    Homework Statement There is a region of space containing a uniform electric field of strength E. A neutral conducting cube with side length s is placed into this field. The cube is aligned with the field. You may assume that the electric field outside the cube is unaffected by any changes that...
  11. S

    Difference between neutral and ground

    What is the difference between neutral and ground?? one more question what is the practical example of current source
  12. H

    Why are carbon electrodes neutral in electrolysis of water?

    What is it about the atomic makeup of carbon electrodes that makes them neutral in electrolysis?
  13. S

    Find Net Force Neutral Point b/w Q1 & Q2 Charges

    Homework Statement A charge, Q2 = -7.00x10^-6 C, is 8.00 cm to the right of charge Q1 = 6.00x10^-6 C. Where can a third charge be placed, along the line connecting Q1 and Q2, such that it experiences no net force? Give distances relative to Q1 and use a plus sign if the third charge is to the...
  14. edguy99

    Observed intensity of Persistent Lines of Neutral Hydrogen

    The site http://physics.nist.gov/PhysRefData/Handbook/Tables/hydrogentable3.htm shows the intensity of various photon energy values from hydrogen. I was not able to see how this intensity was observed (ie. was it from a specific experiment, or does one simply look at the sun and count photons...
  15. edpell

    Why No Neutral Quarks? Exploring the Mysteries of Particle Physics

    For leptons we have charged leptons electron, muon, tau and uncharged leptons electron neutrino, muon nutrino, tau neutrino. For quarks we have charged quarks pairs down, up and strange, charm and truth, beauty. But we have no neutral quarks. Why? The force carrying particle for the charged...
  16. M

    Excitons bound to neutral impurities

    Hi all, I would like to understand the mechanism by which a neutral impurity can bind an exciton. Because the impurity is neutral the attracation can not be simply electrostatic. I know that there must be a "neutralising electyron (or hole)" in the machanism but things are not clear enough...
  17. N

    Why Can We Experience An Electric Shock From Neutral

    I have always been under the impression that the "Live" conductor was the most dangerous conductor. The Live carries 120V (US) 240V (UK) and the Neutral carries 0V, but yet it is still possible to get an electric shock from a Neutral :confused: Why is this possible? Is it because it is...
  18. R

    Is it safe to loop the inverter's output neutral to loop with the mains neutal?

    Is it safe to loop the inverter's output neutral to loop with the mains neutal?? Guys, I need a help on this. I thought that it is rather safe to loop one of the output terminal of the inverter to loop with the mains supply inverter, so that there doesn't arise the need of extra neutral wiring...
  19. I

    Effect of Neutral Conductor on a Point Charge?

    Why should the force on a point charge always be toward a neutral conductor? I know this is a simple concept, but I'm having trouble grasping it. Any ideas? Thanks!
  20. R

    A charged rod transfers electrons to a neutral conductor

    An initially neutral conductor contains a hollow cavity in which there is a + 65.0 nC point charge. A charged rod transfers - 75.0 nC to the conductor. Afterwards, what are the charges along the inner surface and the exterior surface? I understand that the charges from the rod are equally...
  21. S

    Why Is Isolated Neutral Preferred In Some Generators?

    Dear engineers, I need your help in analyzing this query: Our plant consists of 11x 635 KW, 415V Waukesha gensets, 2 x 3.5MW,11KV wartsila gensets, 11 KV main bus for synchronization & 10 MW,11KV, 50 Hz gas turbine. The neutral of gas turbine is earthed against the manufacturers...
  22. P

    Is there molecular friction and movement in balanced loads at the quantum level?

    I have a questions about 120/240v service under balanced loads. When I have a balanced 120v loads the neutral carries no current. I understand the math and vectoral math to this. I am wondering if at molecular level in Quantum Physics if there is actually molecular friction and movement but...
  23. A

    Neutral Wire & Earth: Electricity Distribution

    why during the the distribution of electricity to houses neutral wire is connected to Earth wire?
  24. G

    Calculating Laboratory Energy in Neutral Pion Electroproduction

    I am a high school physics intern, trying to figure out how calorimeter accuracy affects the recoiled proton's mass in a collision, where an electron beam is aimed at a proton target. The electron beam emits a virtual photon and scatters off one of the virtual pions around the proton, and the...
  25. E

    How can I test dubious ground or neutral wires

    I install and repair coffee and espresso equipment and we sometimes run into electrical problems beyond my knowledge (well versed in household wiring, good with fundamental applications of ohms law, etc. but I'm no physics major!) The issue that comes up most often is dubious grounds, or...
  26. D

    Relativistic H/-H in a neutral beam accelerator

    A beam of hydrogen and antihydrogen atoms is accelerated to relativistic velocities by means of a neutral beam accelerator. Identical photodetectors gather and record the photon energies of annihilating H and -H at both ends of the accelerator: where the atoms start; and at the end of the...
  27. B

    Unbalanced star connected load with neutral

    Homework Statement An unbalanced, star connected load with a neutral connection has resistances of value 2,4,1 in the a,b,c lines, and a resistance of 3 in the neutral. Find the current flowing in each line and in the neutral Homework Equations I think: Va = ZaIa + Zn(Ia+Ib+Ic) Vb =...
  28. P

    Is there significant noise in the neutral wire with a sense resistor connected?

    I have a sense resistor connected in series with the neutral wire. From the oscilloscope i detect noise of around 500mV - 1V across the sense resistor at high frequencies 60khz- 100khz. I see the noise once the power plug is inserted to the socket, although not switched on(live wire not...
  29. I

    Calculating balloon neutral boyancy

    Hi, I'm having quite a time figuring out this problem. I have a weather balloon (well, a choice of several) and a payload of about 2kg. Most people release balloons like this such that they keep climbing until they pop, however I'd like to calculate how much to fill the balloon such that it...
  30. N

    Understanding the Raymer Neutral Point Formula

    I am wondering if anybody understands the Raymer neutral point formula? I have attached the formula for reference. Even just an example would be good enough. Thanks, Nate
  31. JK423

    Neutral Pion and Right-Handed Neutrinos

    Hello, i'd really need some help with the following questions. 1) Neutral Pion It's quark content is written as: \pi^0=(u\overline{u}-d\overline{d})/\sqrt{2} But the u-quark have a (quite) different mass than the d-quarks. This means that the neutral pion is a superposition of states of...
  32. S

    Neutral Wires: What They Are & Their Colors

    what are neutral wires and their colours?
  33. A

    Question about neutral region in Derivating Shockley equation

    question about "neutral region" in Derivating Shockley equation Hey guys. I met a problem when derivating the Shockley equation. a few steps before I finally get the Shockley equation , I met the Equation in the attachment. the book said , because there's no electric field in the neutral...
  34. B

    Neutral Current and charged current(weak interactions)

    My question is how to compute the ratio of cross section (mediate by charge current) of neutrino/ anti neutrino of electron in a nuclei which is made of an equal number of proton's and neutrons The same question to neutral current. I have to deliver soon my work. I hope you can answer...
  35. P

    Are electrically neutral particles invisible?

    As the thread title suggests, I was wondering if electrically neutral particles like neutrons can absorb/emit/reflect photons. I don't really have any sort of physics background so I'm not sure this question even makes much sense... but I vaguely remember hearing that photons don't necessarily...
  36. M

    Neutral Xi Decay: Why \Xi^0--> \Lambda^0+\pi^0?

    Is there any explanation why the \Xi^0 decays to \Lambda^0 + \pi^0 and not to \Lambda^0 + \pi^-+\pi^+ ?
  37. D

    Electrostatic force between charged and neutral object?

    Homework Statement Well we just learned about Coulomb's Law today but there is something that is bothering me. According to Coulomb's Law the magnitude of the force of attraction between a charged and neutral object is 0. However, the Law of Electrostatics states that a charged and neutral...
  38. J

    Can particles be weak force charge neutral?

    can particles be "weak force" charge neutral? In the standard model we have fermions of various electrical charges, including neutral. In some sense, we can consider right handed electrons as "weak force" neutral, however the mass term kind of "mixes" the left and right handed. Is there...
  39. J

    Can a neutral pion go to two electron anti electron pairs

    Basically can a neutral pion go to two electrons and two positrons and under what interaction would it do this? I know its defiantly not the strong force, so is it weak or EM? I'm pretty sure its EM but not 100% Thanks
  40. S

    What happens exactly when AC neutral and active lines are switched ?

    Hi, I have a basic understanding of electrical wiring from when I was in school, and have a question that I have always wondered about that I hope someone could answer. My electrician mate tells me for household wiring its important for active and neutral wires not to be mixed up. That...
  41. J

    Checking Chadwick's statement about the mysterious neutral radiation ?

    Checking Chadwick's statement about the mysterious "neutral radiation"? Hi, I have this interesting little problem about Chadwick's identification of the neutron. As the story goes, Curie and Joliot were firing poloniom-sourced alpha particles at beryllium, causing the emission of a neutral...
  42. M

    Parity of the anti neutral kaon

    Hi, very simple question: What is the parity of the anti neutral kaon?
  43. Z

    What actually happens to concentration of species at neutral point of

    What actually happens to concentration of species at neutral point of an indicator (say that of a weak acid)? HIn----> H+ + In- (In=indicator)
  44. K

    Neutral axis for 3 different cantilever beams

    1. Hi all, I'm doing a simulation on 3 different cantilever beam as shown in the attached figure. a) is the beam with only width varying from the base to the free end (height stay constant along the beam) , b) is the beam height varying from the base to the free end (width stay constant along...
  45. T

    Calculating Q (first moment of inertia) above and below the neutral axis

    Homework Statement This is the cross sectional are of the shape: http://img38.imageshack.us/i/shapep.jpg/" It's made of 2 10"x1" plates. (Picture is not to scale) Q (first moment of inertia) above and below the neutral axis should be the same. For some reasons, my calculated Q above is...
  46. E

    Neutral Body Radiation - Does it Emit Electromagnetic Radiation?

    Hi there! An accelerated charge will emit an electromagnetic radiation. But what about a neutral body? If I accelerate a neutral body, I accelerate also the electrons and the protons it contains, so it radiates. Is this right?
  47. J

    Calculation of neutral Kaon Box Diagrams

    Hi everybody,i'm worried about some calculation. I have to write down the amplitude for the neutral Kaon oscillation. There are two Box diagrams which are depicted here: http://upload.wikimedia.org/wikipedia/de/9/92/FeynmanKaon.png The two diagrams come along with a combinatorical factor of...
  48. neduet

    Understanding the Difference between Ground and Neutral in Electrical Systems

    hello friends can i say that Ground(earth) and neutral are same ? if not so, please distinguish them for me :smile: thanks
  49. T

    Drop a charge in a neutral black hole

    Hello, What would happen if I sent an electron into a neutral black hole? Assume basic (undergraduate) knowledge about black holes. I have studied in some details the Reissner-Nordstrom solution including maximal extension using Kruskal coordinates. Thank you!
  50. K

    RC Aircraft Stability: Neutral or Instability?

    For an RC aircraft which i am working on i was thinking about having static stability at the extreme limits of pitching to prevent stalling and further instability, but i was wondering what to have between the limits neutral static stability or static instability. Static instability may help the...
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