What is Poles: Definition and 240 Discussions

The Poles (Polish: Polacy, pronounced [pɔˈlat͡sɨ]; singular masculine: Polak, singular feminine: Polka), also referred to as the Polish people, are a West Slavic ethnic group and a nation that shares a common history, culture, the Polish language and is identified with the country of Poland in Central Europe.
The population of self-declared Poles in Poland is estimated at 37,394,000 out of an overall population of 38,538,000 (based on the 2011 census), of whom 36,522,000 declared Polish alone. A wide-ranging Polish diaspora (the Polonia) exists throughout Europe, the Americas, and in Australasia. Today, the largest urban concentrations of Poles are within the Warsaw and Silesian metropolitan areas.
Ethnic Poles are considered to be the descendants of the ancient West Slavic Lechites and other tribes that inhabited the Polish territories during the late antiquity period. Poland's recorded history dates back over a thousand years to c. 930–960 AD, when the Western Polans – an influential tribe in the Greater Poland region – united various Lechitic clans under what became the Piast dynasty, thus creating the first Polish state. The subsequent Christianization of Poland by the Catholic Church, in 966 CE, marked Poland's advent to the community of Western Christendom. However, throughout its existence, the Polish state followed a tolerant policy towards minorities resulting in numerous ethnic and religious identities of the Poles, such as Polish Jews.
Poles have made important contributions to the world in every major field of human endeavor, among them Copernicus, Marie Curie, Joseph Conrad, Fryderyk Chopin and Pope John Paul II. Notable Polish émigrés – many of them forced from their homeland by historic vicissitudes – have included physicist Joseph Rotblat, mathematician Stanisław Ulam, pianist Arthur Rubinstein, actresses Helena Modjeska and Pola Negri, military leaders Tadeusz Kościuszko and Casimir Pulaski, U.S. National Security Advisor Zbigniew Brzezinski, politician Rosa Luxemburg, painter Tamara de Lempicka, filmmakers Samuel Goldwyn and the Warner Brothers, cartoonist Max Fleischer, and cosmeticians Helena Rubinstein and Max Factor.

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  1. P

    Stability of a system with poles and zeros at infinity

    I have a system transfer function H(s) = 1/(e^s + 10) This system has both poles and zeros at infinity and -infinity. Can anybody tell me if this is a stable system. Thanks.
  2. I

    Understanding Law of Poles (Electric)

    Homework Statement The question is this: State the law of poles (electric) states Homework Equations The Attempt at a Solution Ok, so I assume it's a typo above...and should read either: 1. State the law of poles (electric) or 2. The law of poles (electric) states. That is the question I am...
  3. S

    How do i solve this problem based on magnetic data and the poles?

    i have a question that involves geographic coordinates of a city and magnetic data here it is: compare geomagnetic and geographic latitude to determine whether a city is closer to geographic of geemagnetic pole. the geographic coordinates are 75.55W and 45.40N. the horizontal and vertical...
  4. L

    Didn't Global Warming Theory Predict An Increase In Ice Levels At The Poles?

    If so, wasn't it confirmed when we saw an increase in ice levels at the poles this year?
  5. C

    Does Moon have North and South Poles ?

    Thanks Naveen
  6. N

    Poles, zeroes, and essential singularities of z^(2/3)

    Homework Statement Identify the zeroes, poles and essential singularities of f(z) = z^{2/3} Homework Equations f(z) = e^{\frac{2}{3}\log{z}} Which I'm not sure will be useful... The Attempt at a Solution I know that f is 0 at z=0, but what is the order of this zero? Is there such a...
  7. wolram

    What are the potential effects of body image stereotypes on nursing students?

    Nearly all the blokes have beer bellies and nearly all the girls are bean poles, bean poles wearing barbie doll clothes, and beer bellies wearing jeans and tee shirts, that is the impression i had when i went to the city.
  8. E

    Unravelling the Mystery of Poles and Residues

    I still don't quite fully understand about the order of poles and calculating residues. Take f(z) = 1/sin z at z=0 for example. When I try putting that into Laurent expansion about z=0, 1/ sin z = 2i/ (e^z - e^(-z)) = 2ie^(-z) / ( 1 - e^(-2z)) = 2ie^(-z) [ 1 - e^(-2z) + e^(-4z) - e^(-6z) +...
  9. T

    Magnetic poles flipping and the effect on animals

    There is supposed to be a switch of magnetic poles in several thousand years which already started 150/200 years ago. This gave me an idea. Can the changing magnetic orientation cause the whales (and other large mammals living in the sea who use the Earth's magnetic field) to "crash" on shores...
  10. G

    Magnetic Force: Causes & Effects of Opposite Poles

    What causes the magnetic force between 2 magnetic poles?
  11. B

    Copper penny failling between poles of magnet

    Homework Statement A copper penny falls on a path that takes it between the poles of a magnet. Does it hit the ground going faster, slower, or at the same speed. The Attempt at a Solution Clearly the penny undergoes a change in magnetic flux. Since it receives a change in magnetic flux...
  12. E

    How can poles and zeros help in filter design and control systems?

    Hi, I'm trying to gain a better understanding on poles and zeros. Seems everywhere i read it says the poles and zeros can tell you the system response, characteristic and you can do lots with it from filter design to controls. Its a broad area but was hoping someone can provide further...
  13. M

    Medium between poles of magnets

    hello guys, I finally decided to join a forum online and starting asking my " brilliant" :-0 questions..hehehe..oh man i have plenty of those.. OK, am reading the book: understanding physics, by isac asimov. And i am reading about magnetisim now, and its stated two things that bugged my...
  14. S

    Why are the poles of a magnet stronger?

    Are the force around the poles compressed, so it makes the poles of the magnet stronger than the other parts? Thanks.
  15. S

    Distance from North to South poles

    Is the distance from North to South poles of the Earth equal that from West to East poles ?:frown:
  16. M

    What exactly is it that determines that a magnet has only 2 poles?

    I have a few questions about magnetics. Let's say I have 4 individual magnets of equal size. 1.) When all 4 individual magnets come together and are held together by their magnetic force do they form 1 whole magnet with two poles or do they remain individual magnetics each with their couple of...
  17. L

    How do i get sin(z)/2i = 1/4(e - 1/e) ? Resides at Poles question?

    Homework Statement Find Poles & eval resides at those points for f(z) = sin(z)/(z^2+1) Homework Equations I'm using Res f(z) = [g^m-1 (z_0)] / (m-1)! The Attempt at a Solution So I worked out the f(z) = 1/(z-i) so g(z) = sin(z) /(z+i) for my first one did the sub for z=i...
  18. A

    Should the poles at the end of each magnet be similar?

    Hi, I have a question about magnetism. If 2 magnets are used to pick up iron shavings, and the magnet are connect with paramagnetic material and turned into a U-shape. Should the poles at the end of each magnet by similar or dissimilar to pick up the iron shavings most effectively?
  19. L

    Evaluating Higher Order Poles: A Simple Download

    I need to know how to evaluate higher order poles. I have the answer for the integral of this function [tex]\frac{(1 + x^2)}{(1 + x^4)}[\tex] from integrals.wolfram.com, but think it can be done using residues. I believe it involves taking a derivative and then multiplying by the pole...
  20. O

    Rotation and Poles: Water Draining Equator - True or Farce?

    I have a question with rotation and the equator. The question is on the north and south sides of the equator water travels clockwise or counterclockwise when drained. Does this occures in the first place or is it a farce. If this is true would engines or motors work more efficiently working...
  21. Loren Booda

    Reversal of magnetic poles upon migration

    Will a sudden change in the orientation of Earth's magnetic poles have catastrophic consequences for migrating species?
  22. M

    Magnetic forces and many poles

    i had this idea of a magnet, if u bend the magnet, so that it has 2 edges on the north pole and 2 edges on the south pole, just like half a tunnel, i don't know the name of the shape, but suppose it has 2 edges on the north pole, won't the 2 edges repel each other because they are positive, what...
  23. B

    Calculating Length of a Cable Between Poles

    A cable hangs between two poles of equal height and 37 feet apart. At a point on the ground directly under the cable and x feet from the point on the ground halfway between the poles the height of the cable in feet is h(x)=10 +(0.4)( x^{1.5}) The cable weighs 15.1 pounds per linear foot...
  24. C

    Earth's Celestial Poles: North and South

    How are the north celestial pole and south celestial pole related to Earth's north and south pole
  25. M

    Fast way to find system poles?

    Hey, I was wondering if there is a fast way to find the poles of a system - not using a calculator. For example, G(s) = \frac {30}{(s^2 + 6s + 20)(s + 2)(s + 13)} I know two poles right off the bat: -2 and -13, but is there a way to get the poles from the quadratic quickly? Besides the using...
  26. S

    General method of determining order of poles

    In Boas on p.595 there's an FCV proof for finding the order of a pole. It says to write f(z) as g(z)/[(z-zo)^n] and then write g(z) as a0 + a1(z-z0) ... etc. and that we can deduce that the Laurent series for f(z) begins with (z-z0)^(-n) unless a0 = 0 i.e g(z0) = 0. Therefore the order of the...
  27. C

    Exploring Ampere's Law and Magnetic Fields at the Poles

    A north pole and south pole are separated by some distance (positioned vertically). Using the discrete version of Ampere's law: Take a path rectangle with one vertical side completely inside the magnetic field and the other vertical side completely outside the magnetic field. Where h =...
  28. M

    Exploring Magnetism: North Pole vs. South Pole

    What is the difference between the north pole and the south pole of a magnet?
  29. H

    Centrieptal accleration and the poles of the earth

    Why does centripetal acceleration effect your weight at say that equator but not at the poles? Does it effect but just to a small extent?
  30. D

    Residue Calculus for Evaluating e^z/cosh z on Circle |z|=5

    I need to use residue calculus to evaluate: \oint_C {\frac{{e^z }}{{\cosh z}}} dz where C is the circle |z|=5 My only problem (which is a stupid one) is working out how many poles the function has inside the circle. I know its going to have them at pi*i/2 + pi*i*k. This is probably a really...
  31. C

    Will the Earth's magnetic poles flip?

    I just watched a documentary on the history of the Earth's magnetic field that was very interesting. It said that the Earth historically has averaged a pole flip roughly every 200,000. However, Earth has not flipped its poles in over 700,000 as evidenced by ferromagnetic iron samples taken...
  32. H

    What causes the formation of magnetic poles in a bar magnet?

    What determines a magnetic pole? Everyone has known sense elementry school that on a bar magnet (and the earth) have North and south magnetic poles... my question, what make a (bar magnet) that way? If I were to cut a bar magnet in half(between the poles) would I have one magnet that was...
  33. N

    Why don't I weigh more at the poles

    Hi all Another thought I have been pondering is why don't I weigh significantly more at the poles than I do at the equator The Earth rotates at n kilometers per hour, I think around ~1300 kmph Would this not create a centrigual effect countering Earth's gravity. thus making me lighter...
  34. M

    What is the time at the poles?

    We measure time in different regions using longitude. But as you get closer to the poles, these lines converge (obviously). Does that technically mean it is "all times" at the pole where they all meet? And by moving one inch away, I can be in all time zones at once with one foot? Obviously, this...
  35. Mk

    Earth's Geomagnetic Poles: Effects & Sun's Polar Shifts

    I need to know all the bad things that will happen if and when the Earth's geomagnetic poles will shift. Also, about every 11 years when the sun's poles change what happens to the sun?
  36. A

    Different poles and arrange them in a circle

    say I take magnets of different poles and arrange them in a circle sorting them by one + and then another - and so on and I fixed them so they would nto move. What would happen if you placed a metal inthemiddle. Would this be kinda like a perpetual motion machine since the magnets onthe...
  37. P

    Bathroom scale on one of the Earth's poles

    I need help on this problem: Suppose you stand on a bathroom scale on one of the Earth's poles, and it reads 700.0 N. If you stand on the same scale on the Earth's equator, and your mass is unchanged, what will be the scale reading on the equator? (Remember that the scale tells you the normal...
  38. eagleone

    Permanent Magnet Shape: Position of N/S Poles

    Let’s say I make ball (sphere) out of permanent magnet material. Where will be N/S poles, will they take fixed position or, as I think, position won't be fixed. p.s. same for magnet ring
  39. S

    Why the gravity is weaker in the poles than in the equator

    according to Newtons law since the Earth is flatten in the poles the distance to the center of the Earth is bigger in the equator and therefore its gravity is stronger there. with this same argument you could say that if you got to the center of the Earth the distance tends to 0 and therefore...
  40. F

    Unnecessary magnetic poles ?

    Unnecessary "magnetic poles" ? If I run steady, same direction, currents through two close, slack parallel wires, I will see the two wires attract each other. If I reverse one of the currents I will see the two wires repel each other. If I now roll the wires up into coils, and place them on...
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