What is Rules: Definition and 537 Discussions

International rules football (Irish: Peil na rialacha idirnáisiunta; also known as international rules in Australia and compromise rules or Aussie rules in Ireland) is a team sport consisting of a hybrid of football codes, which was developed to facilitate international representative matches between Australian rules football players and Gaelic football players.
The first tour, known as the Australian Football World Tour, took place in 1967, with matches played in Ireland, the United Kingdom, and the United States. The following year, games were played between Australia and a touring County Meath Gaelic football team, Meath being the reigning All-Ireland senior football champions. Following intermittent international tests between Australia and Ireland, the International Rules Series between the senior Australian international rules football team and Ireland international rules football team has been played intermittently since 1984, and has generally been a closely matched contest. The sport has raised interest and exposure in developing markets for Gaelic and Australian football and has been considered a development tool by governing bodies of both codes, particularly by the AFL Commission.
International rules football does not have any dedicated clubs or leagues. It is currently played by men's, women's, and junior teams only in tournaments or Test matches.

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  1. H

    Apply Kirchoff's rules with a non-ohmic resistor?

    I'm trying to work out the correct algorithm for using Kirchoff's rules when using a non-ohmic resistor like a light bulb. The problem is that the resistance depends on the voltage, but the voltage may depend on the resistance (a simple example: a bulb and a resistor in series: how should the...
  2. W

    Feynman rules for vector bosons

    I'm learning QFT by reading Lewis Ryder's book, so my question in short is: how he arrives at Eq 7.57 and Eq 7.58? If you don't have the book, the question is: why are there Minkowski metric terms in the Feynman rules for a gauge field coupling to itself? If the answer is complicated, simply...
  3. E

    Solving Boolean Equation: A̅D + AB̅C̅D

    boolean equation = A̅D + AB̅C̅D = D (A̅ + AB̅C̅) * rule A + A̅B = AB ? = A̅D + B̅C̅D am i using the rule correct or does A̅ + A make it a 1 and answer D(1)
  4. I

    [QFT] Feynman rules for self-interacting scalar field with source terms

    I'm not sure if this is the right place to post a graduate level course material, but I have a question about perturbative expansion of the 2n-point function of a scalar field theory. Homework Statement First, the question: In which space (position or momentum) is the topological distinctness...
  5. Fredrik

    Exploring the Born vs ABL Rules & Time Reversal in QM

    The Born rule says that if a system is prepared in state |a>, and a measurement of an observable Q is performed, the probability that the result is qi is P(q_i)=|\langle q_i|a\rangle|^2 The ABL rule (Aharonov, Bergmann, Lebowitz) says that if a system is prepared in state |a>, and a...
  6. S

    Finding a Criterion for Allowed Reactions in ABC Toy Theory

    Homework Statement In an ABC toy theory, the only allowed vertex is one that couples A, B and C. Thus there are no AAA, ABB, ACC...ect vertices allowed. My question is suppose a diagram has na external A lines, nb external B lines, and nc external C lines. Develop a simple criterion for...
  7. Evo

    News Bush set to relax rules protecting species

    This is so wrong, IMO. http://news.yahoo.com/s/ap/20081120/ap_ca/bush_endangered_species
  8. T

    A re-conception of energy as the set of rules for how matter moves

    A standard definition of energy is the ability to do work. Work is defined as the movement of matter through the application of force (measured in Newtons). Yet in the Standard Model of particle physics, various bosons represent "energy particles" that are the intermediaries for each of the...
  9. S

    Linearity Rules for Proving Non-Linearity

    Does anyone have a straightforward link to linearity rules? My textbook is not very helpful and my prof never knows what he is talking about :(. I have a few "prove this is not linear" questions to do f(x)=(|x1|,|x2|) f(x)=(1,2)+3x f(x)=(0,1) I should know this, but i tend to forget the...
  10. G

    Which algebraic rules altered for complex numbers?

    What changes to the algebraic rules when imaginary "i" is introduced in addition to real numbers? I know that complex numbers do not have a "<" or ">" relation. Some functions become multivalued. What about school algebra? Maybe exponentiation rules are slightly modified?
  11. V

    IUPAC Naming Rules: 2,5-Dichlorobenzene

    Homework Statement What is the IUPAC name for the following compound. (Benzene with two chlorines sticking out one at Carbon 2 the other at Carbon 5) Homework Equations The Attempt at a Solution I understand that the compound's name has to be something like 2,5-dichlorobenzene but...
  12. D

    Are complex logarithm rules the same as real number rules?

    Hi. I know that for real numbers log(z)=-log(1/z) is this also true in general for complex numbers?
  13. S

    Matrix word and elementary row reduction rules

    Homework Statement a house plan has 3 different floor plans: Plan A- 3 three-bedroom units, 7 two-bedroom units, and 8 one-bedroom units Plan B- 4 three- bedroom units, 4 two-bedroom units, and 8 one-bedroom units Plan C- 5 three-bedroom units, 3 two-bedroom units, and 9 one bedroom units...
  14. J

    Mathematical Derivation of Significant Figure Rules

    Mathematical Derivation of Significant Figure "Rules" Let's say I have a scale which can accurately read weights out to ten-thousandths of a gram so it might read 1.0005 g or 0.0005 grams ... why is it that the first reading has 5 significant figures and the second has only 1? Same instrument...
  15. D

    Solve N Ground State in (2s+1)(L)(J) Format

    Homework Statement Find the ground state of nitrogen in the form (2s+1)(L)(J), where s represents the total spin, L represents the total orbital angular momentum (s,p,d,f), and J represents the total angular momentum. Attempt at solution Well, the electron configuration is [He](2s)^2...
  16. Y

    Electric Circuits, Kirchhoff's Rules

    The question: Suppose point A is grounded (V = 0) in Figure 21-36, in which script e = 16 V and R = 11 . Find the potential at points B and C. Here is the diagram: http://www.webassign.net/walker/21-35alt.gif I'm pretty sure that I have to use Kirchhoff's rules in order to solve this problem...
  17. K

    Did Fleming Explain about His rules completely?

    Pls point out me every body. I wish to know why does the magnetic field and current are perpendicular to each other? Or is it natural phenomena?
  18. S

    Disconnected diagram Feynman rules momentum space

    Hi! I wonder if the Feynman rules in momentum space can also be applied to disconnected diagrams. So aussume I have a disconnected Feynman diagram 1 , i.e. the product of two connected Feynman diagrams 2 and 3. I can translate my diagrams with the position space Feynman rules to explicit...
  19. B

    Need info on rules for applying derivatives in QM equations

    This is not a homework problem, but advice on the presented examples would be helpful anyways. Does anyone know of a good QM textbook or website that discusses the rules for applying derivatives in QM? In reviewing many of the derivations, I find many weird applications with no reasoning from...
  20. W

    Right hand rules explanation

    Homework Statement http://www.cramster.com/Answer-Board/Image/20073231626286331026398833900007956.jpg This is not problem. I just having trouble understanding the basics. Please just tell me right away, don't 'assist!' I trying to understand the right hand rule. Here are to...
  21. C

    Kirchoff's Rules: Solve P28.19 Circuit

    Homework Statement Determine the current in each branch of the circuit shown in Figure P28.19 (attached) Homework Equations Kirchoff's Rules: \Sigma I_{in} = \Sigma I_{out} \Sigma \Delta V = 0 The Attempt at a Solution I have no idea where to begin. It's in the Kirchoff's...
  22. V

    When can we ignore the delta function in th Feynman rules?

    in peskin-schroeder and http://www.hep.phy.cam.ac.uk/batley/particles/handout_04.pdf" the amplitude for e^-e^+\rightarrow \mu^- \mu^+ is written using feynman rules as follows -iM=[\bar{v}(p_2)(-ie\gamma^\mu )u(p_1)] \frac{-ig_{\mu\nu}}{q^2}[\bar{u}(k_1)(-ie\gamma^\nu )v(k_2)] but what...
  23. L

    Rule Breaker: Ever want to change the rules of physics?

    Just as a dream, has anyone wanted to change the laws of physics? Example: F = ma^4 or something like that? If you could, what would you change and why?
  24. K

    Calculating equilibrium constant rules

    Homework Statement Find the eq. constant for the reaction CH3COOH (aq) + NO2- (aq) = CH3COO- (aq) + HNO2 (aq) The Attempt at a Solution I find Ka for the reaction CH3COOH = CH3COO- + H+ and Kb for the reaction NO2- + H+ = HNO2 But what are the rules then? I try multiplying the...
  25. B

    Magnetic moments rules of thumbs

    not totally sure this should be in the advanced physics section. its a general test your knowledge question of everything youve learnt, so naturally i can't remember anything... a magnet of magnetic moment U is droped such that it falls down metal tube of length L. the magnet's magnetic...
  26. G

    Checkers - rules when one player can't move?

    I was playing checkers today with a friend and the weirdest thing happened. I was black and he was red. I had a black piece situated so that there were no possible moves for his red piece, but i could still make a move. It eventually came down to him having two pieces (one that couldn't move and...
  27. P

    Integral Rules: Solve (e^(x^2))` and Use it to Solve §5x*e^(x^2)dx

    Homework Statement Solve (e^(x^2))` , use this result to solve §5x*e^(x^2)dx Homework Equations * is multiply ` is derive 1.§e^xdx=e^x+C 2.§e^kxdx=1/k*e^kx+C 3.§a^xdx=1/ina*a^x+C (a is a number) 4.§k*f(x)dx=k*§f(x)dx The Attempt at a Solution (I'm alittle confused as to...
  28. tony873004

    Learn Kirchoff's Rules: Solve Circuit With Series and Parallel Combinations

    Kirchoff's Rules I can not find a good explanation anywhere for Kirchoff's rules. Googling onlygives me links that don't explain it well, and my textbook's explanation is lacking as well. I'll go over my textbook's description, so hopefully someone here can clarify this for me. 1...
  29. R

    Kirchhoff's Rules: Solving Homework Questions on Circuit Currents

    Homework Statement Find the currents in the circuit shown in the figure attached. Homework Equations I actually have the solution worked out but I don't understand why something was done. So they chose to travel the bottom loop and the top loop clockwise in both cases. So they set up the...
  30. J

    Applying Kirchhoff's Rules to Solve Circuit Problems

    Homework Statement http://img245.imageshack.us/my.php?image=physicsef4.jpg Homework Equations The change in Voltage = 0. The Attempt at a Solution Ok I have no clue where the loops go from. I want to say something like the current for I1 starts at the 10V battery in the middle...
  31. T

    How Do You Calculate I_2 and I_4 Using Kirchoff's Rules?

    [SOLVED] Using Kirchoff's Rules Homework Statement http://img266.imageshack.us/img266/4120/kirchoffho1.gif In the circuit, I_1 = 1.6 A. Find the value of: (a) the current I_2 and (b) the current I_4. Homework Equations Junction Rule, Loop Rule, V=IR The Attempt at a Solution Small loop...
  32. D

    Solving Kirchoff's Rules for Triangular Array of Resistors

    A triangular array of resistors is shown in the figure. What current will this array draw from a 35.0 V battery having negligible internal resistance if we connect it across (a) ab, (b) bc, (c) ac? Kinda confused... just anything to start me off on the right track would be very helpful.
  33. BobG

    US Supreme Court rules on grammar

    After a prolonged dispute that progressed through US District Court and the 11th Circuit Court all the way to the US Supreme Court, the Supreme Court finally settles whether Webster’s Dictionary’s definition of “any” should take precedence over ejusdem generis and noscitur a sociis...
  34. N

    Quark Structure of Particles & Antiparticles: Rules & Order

    I am asking this question because I did not get it clarified in any of the books I have read. What is the rule for having the quark structure of an antiparticle given the structure of the particle?Is it always OK to put bar on the quark symbols of the corresponding particle? Specifically,I...
  35. A

    Can Spins Flip in an EPR Experiment?

    hello I got al little bit confused about spins flipping in an EPR experiment. As far as I know, the idea of EPR is to measure the absorption of an electromagnetic wave induced by spin flips if the energy is conserved by \hbar \omega = g_{spin} \mu_B B_0. But now I heard several times that a...
  36. E

    Understanding Feynman Rules for ABC Theory

    [SOLVED] feynman rules Hi , It is a simple question from the book of david j .griffiths :"introduction to elementary particles" (6.11) Homework Statement (a) Is A--->B+B a possible process in the ABC theory (feynman rules for a toy theory) (b)Suppose a diagram has nA external A lines , nB...
  37. Holocene

    Simple math rules seem contradictory

    Simple math rules seem contradictory... :( Consider this simple expression: x^8 - 16 If we wanted to write this expression as the product of two factors, we could start with something simple like this: \sqrt{x^8 -16} . \sqrt{x^8 -16} From that, we would simply get this: (x^4 -...
  38. C

    Electric Dipole Selection Rules

    Homework Statement For \Deltal = 0 the transition rate can be obtained by evaluating the electric dipole matrix elements given by \vec{I} = \int \Psi^{*}_{1,0,0} (e \vec{r}) \Psi_{2,0,0} d\tau Homework Equations The Attempt at a Solution I've got the two wave functions...
  39. S

    Mathematica Resonance and rules for mathematical equations

    Homework Statement What is the wavelength of the lowest note that can resonate within an air column 42 cm in length and closed at both ends. Homework Equations Given: l = 42 cm n = 1 Required: \lambda Analysis: l = \frac{n\lambda}{2} therefore \lambda = \frac{2l}{n}...
  40. mjsd

    QFT Cutting Rules: Improved Versions & Worked Examples

    I am wondering whether someone can suggest a good ref or two (preferrably with worked example) on how to use Cutkosky (or whatever it is called) cutting rules in QFT to help pick out the absorptive/Imaginary part of a 1- or 2-loops diagrams. I have already tried Peskin and Schroeder, which is...
  41. mjsd

    ?Ref for Cutkosky cutting rules

    I am wondering whether someone can suggest a good ref or two (preferrably with worked example) on how to use Cutkosky (or whatever it is called) cutting rules in OFT to help pick out the absorptive part of a 1- or 2-loops diagram. I have already tried Peskin and Schroder, which is good only up...
  42. K

    Solving Current in a Circuit with Kirchhoff's Rules

    Homework Statement The currents are flowing in the direction indicated by the arrows. A negative current denotes flow opposite to the direction of the arrow. Assume the batteries have zero internal resistance. http://img123.imageshack.us/img123/2045/599c898aa10950d7027807dyc7.th.jpg...
  43. L

    Should you always apply the rules of significant figures?

    Should you apply the rules of significant figures when you are doing any kind of physics, chemistry, or mathematics computation? Like, for example if you are doing homework problems in your textbook, should you still follow the sig fig rules or should you only apply them in labs and measurements?
  44. W

    Selection rules and related stuffs

    I'm quite confuse with some concepts here. The selection rules are derived from the requirements that quantum numbers must be conserved. It's OK. Then I see they give rules for so-called electric dipole transitions. I just wonder why dipole comes in here. How do you classify these kinds of...
  45. Doc Al

    Forum Rules - PLEASE READ BEFORE POSTING

    Before posting anything, please review the https://www.physicsforums.com/showthread.php?t=414380". If you are seeking help with a homework/coursework/textbook-related issue please post your problem in the appropriate forum in our https://www.physicsforums.com/forumdisplay.php?f=152" area. All...
  46. G

    Transition Rules for 4 Quantum No.s | Q&A

    Can you give us the transition rules regarding four quantum no.s?
  47. F

    Kirchoff's Rules Homework: Solving 3 Unknowns in a Circuit

    Homework Statement This is the circuit I'm working on: Homework Equations My equations are: 4.64v=-200I1-800I3 4.64v=750I3+800I2 4.64v=-200I1-750I3The Attempt at a Solution I should have a third unknown in each equation. I not seeing where I'm going wrong. I'm supposed to put this in a 3X3...
  48. quantumdude

    New NBA Playoff Rules: How Did the Bulls Get Home Court Advantage?

    Who's watching the playoffs? Who are you rooting for? My Bulls are exciting again, so after many years of not caring about the NBA, my interest is piqued again. It's been so long since I've paid attention to the playoffs (I started watching again last year), that it seems there must have been...
  49. O

    Understanding Right Hand Rules - Namely w/ parallel wires

    Homework Statement There seem to be three right hand rules for dealing with magnetic field, current, and force, and I don't quite understand how to use them. Namely, I'm having trouble understanding why two parallel wires with current flowing in each of them attract if the currents are in...
  50. S

    Solving a circuit using Kirchhoff's Rules

    Homework Statement using kirchhoff's rules, determine the current through and voltage drop across each resistor in the accompanying figure. Homework Equations V=IR, potential voltage ( voltage drop )= current * resistance Voltage in series Vt=V1 + V2 + V3... Current in series...
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