What is Correction: Definition and 202 Discussions

A correction fluid is an opaque, usually white fluid applied to paper to mask errors in text. Once dried, it can be handwritten or typed upon. It is typically packaged in small bottles, lids attached to brushes (or triangular pieces of foam) that dip into the fluid. The brush applies the fluid to the paper.
Less commonly, the fluid's fumes are inhaled to create dizziness, tachycardia and euphoria, sometimes producing adverse effects.
Before the invention of word processors, correction fluid greatly facilitated the production of typewritten documents. One of the first forms of correction fluid was invented in 1956 by American secretary Bette Nesmith Graham, founder of Liquid Paper. With the advent of colored paper stocks for office use, manufacturers began producing their fluids in various matching colors, particularly reds, blues and yellows.

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  1. A

    How Does Self Energy Affect the Mass-Energy Equation in Particle Physics?

    Let us consider the equation E=mc^2 in relation to a charged particle. The traditional deduction of this relation as we find in the introductory texts on Special Relativity do not take into account the huge amount of electrostatic field around it. If the particle annihilates not only the bare...
  2. S

    Coulomb correction for beta decay spectrum

    Hello I am re-reading some of my old textbooks and have come across a simplified (non-relativistic) term used to correct the beta decay spectrum for the coulomb effect of the nucleus on the ejected beta particle. The expression is; F(Z,E) = (2*Pi*n) / (1 - exp(-2*Pi*n)) where n =...
  3. J

    Determining Sun-O'-Plane Angle with Rolling Motion Correction

    so imagine you have an airplane traveling at an axis projecting a signal vertically down along AF axis and you have some point O on AF axis and a refference angle Sun-O-Plane . the plane gets affected by some rolling motion at a certain known angle... now the axis shifts to A'F' and O become O'...
  4. J

    Calculate Correction Formula for Sun-O'-Plane Angle

    so imagine you have an airplane traveling at an axis projecting a signal vertically down along AF axis and you have some point O on AF axis and a refference angle Sun-O-Plane . the plane gets affected by some rolling motion at a certain known angle... now the axis shifts to A'F' and O become O'...
  5. K

    Correction term to Newtons gravitation law

    Hey! My teacher told me that there is a correction term to Newtons law of gravitation when you take general relativity into account, somthing lik: F=G\frac{M_1M_2}{r^2}+F_{correction} I been searching like mad but can't find it on the internet anywhere. The only things I found was a set of...
  6. K

    Can I Improve Power Factor Correction with a Parallel Component?

    I've been working on a mathematical problem for a few days now. I'm not sure where my math is falling apart. I have an impedance connected in series with a source. In phasor notation, the impedance is 1.2649 at 71.565 degrees. In rectangular, this impedance is .4 + j1.2 . The power factor for...
  7. R

    Drive Line Out Of Gear Correction

    I am working on a vehicle based computer game. The focus right now is to get the internal physics of each drive line component as physically correct as possible. Since a few weeks, I am stuck with a problem that I cannot get past by myself. I have narrowed it down to a specific issue. It should...
  8. M

    Perturbation: First order correction to particle-in-box eigenstates

    First order correction to particle-in-box eigenstates for Dirac perturbation Homework Statement Calculate the first three nonzero terms in the expansion of the correction to the ground state \psi^{1}_{1} for a Dirac delta perturbation of strength alpha at a/2 (box from 0 to a). Homework...
  9. E

    End correction of the pipe mouth(standing wave)

    Consider a pipe closed at one end and open at the other.a simple model tells that resonance will occurs when the sound wavelength of the resonator is 1/4,3/4,5/4.. of pipe length,by assumption that antinode occurs at the open end.But it comes out that the air at open end isn't completely...
  10. B

    CURRENT LOOP Q. i HAVE ATTEMPTED, JUST NEED CORRECTION OR REJECTIONTHANKS

    [b]1. Homework Statement A 4-20mA current loop is being used to transfer temperature values in the range + 10ºC to +60ºC. (i) What temperature is represented by a current of 7mA? (A) What current would you expect when the temperature of the sensor is 32ºC? Homework Equations i HAD AN...
  11. L

    Why is counterm included in both orders of correction in Srednicki chapter 14

    Hi, I think maybe my last question was too much of an essay for anybody to bother going through, so I thought I would ask something more modest: In Srednicki chapter 14 fig 14.1, we have the counterm correction from A and B contributing to O(g^2), I understand it being here since A,B...
  12. P

    Any Laboratory Scale Test of GR's correction to Newtonian Gravity?

    Understanding the short-distance behaviour of gravity is crucial for constructing a quantum theory of gravity. The Newtonian inverse square law approximation has been tested in laboratory down to millimeter scales, but I'm not aware of any laboratory scale experiments testing general...
  13. A

    Is the tail correction method suitable for all crystal structures?

    Hi all, I'm doing classical (Monte Carlo) simulations on crystal structures using so far the following tail correction where \rho(r) is the pair correlation function and U(r) the pair potential. 2N\pi\rho\int_{r_{c}}^{\infty}\mathrm{d}r\, r^{2}U(r) It is usual to assume that \rho(r)=1 for...
  14. P

    Air Navigation and Course Correction. Semester exam in 45 minutes.

    Homework Statement A pilot wishes to fly 2875 km to an airport 18 degrees east of north from his departure point(for the sake of the problem and simplicity, use the origin). He wants to make the trip in 3 hours and 20 minutes. The pilot finds that he actually has to make a change in his air...
  15. T

    Can Anyone Explain How to Solve Vertex Correction for a W Boson?

    do anyone can help to solve this vertex correction for W boson? \frac{-ieg^{2}}{8(2\pi)^{4}}\int...
  16. U

    Measurement correction and uncertainty

    Give a measurement result by the correction and uncertainty in the calibration of the thermometer indicator! With reference thermometer are measured 135.14 ° C, with another thermometer which was calibrated with reference we got the following values: 140.15 ° C 140.14 ° C 140.13 ° C 140.12 ° C...
  17. G

    Is the Entropy Correction Term Calculated Correctly?

    I assumed that entropy derives from combinatorics so I calculated S=\ln \frac{\prod_{i=1}^S n_k!}{n!} for n particles in S states. The result is S=\ln \frac{\prod_{i=1}^S n_k!}{n!}=n\sum_{i=1}^S p_i\ln p_i+\frac12 s\ln n if p_i=n_i/n and \ln n/n\ll S What about the second correction term...
  18. G

    Creating a timing correction factor for weight differences in karting

    Hey all, this is long so read if you like anything to do with motorsports and let me know what you think. My friends and I (currently in junior year as ME student) are going to a high performance karting facility for some good racing and I wanted to do something as a fun little project...
  19. E

    The 1st excitad state in 1st order correction

    Homework Statement find the 1st order correction for the 1st excited state with spin when the H'=(eB0/2mc).Lz+2Sz z the direction this proplem for the charge particleon sphere of radius R with magnatic field B Homework Equations l=1 m=0,1,-1 [b]3. ]The attempt at a...
  20. T

    Why Does the Sag Formula Require Multiple Applications for Measuring Distances?

    Sag formula When measuring a distance with a 100 foot steel tape supported at both ends the sag formula needs to be applied to correct the distance. Does anybody know why an overall distance does not work in this sag formula? For example If you measure a distance of 735 feet you would have...
  21. E

    Lowest-order correction for the bendulum

    what is the lowest-order correction to the ground state for the pendulum with small angle?
  22. E

    Estimating Ground State Energy Correction of Hydrogenic Atom

    Homework Statement using first-order perturbation theory ,estimate the correction to the ground state energy of a hydrogenic atom due to the finite size of the nucleus, assume it's spherical nucleus. Homework Equations you can employ the fact that the electrostatic potential fi...
  23. F

    Question concerning Ideal Gas Law correction to a teacher & tactons

    Whoops, I meant to say tact. Hehe, maybe tactons are the gauge bosons for the tact force. My Chemistry teacher, who has a Ph.D in Biology., is teaching us that one can use the Celsius temperature scale for the Ideal Gas Law using (approximate) R = 0.0821 \frac{atm * L}{mol * K} . Where R is...
  24. S

    Hamiltonians, non-interacting hydrogenic systems, spin correction. Help

    Eyoop gents, just looking for a wee bit of help with a correction term in the energy of a ground state hydrogenic Helium nucleus. I tried searching, but I didn't find what I needed. Non-interacting hamiltonian for two hydrogenic atom is \hat{H}_{0} =...
  25. S

    Max Codewords in a 2 Error Correcting Binary Code - n

    Homework Statement Let C be a 2 error correcting code based on the binary alphabet {0,1}. suppose that the length of each codeword is n.. What is the max number of codewords that this code may have Homework Equations The Attempt at a Solution I'm having a real tough time...
  26. B

    Power Factor Correction: Calculating True and Apparent Power in a Circuit

    Homework Statement This is the circuit: http://img129.imageshack.us/img129/3566/pfcog8.jpg Assume voltage is in rms and f is 50Hz. I have to do three things. First, calculate and compare true power vs apparent power in the load. Second, find the value of a capacitor placed in parallel...
  27. S

    Gravity corrections- latitude correction

    i have i problem with many parts to it that the forums may be able to help me with. I've been given a scenario which involves gravity surveys along a path, in summary here it is: a gravity survey is taken at an initial latitude of 45 degrees and has an azimuth of 30 degrees. ive also been...
  28. M

    Question #2: Relative Velocity of Two Trains Moving in Opposite Directions

    Question: Look at figure 1.8. If car A were to increase its speed to 60m/s, what would be the velocity of car A relative to car B. figure 1.8 is a picture of two car going different direction basically facing each other. Car a on the right is going at 40m/s and car b on the left is going at...
  29. E

    Relativistic correction for strong nuclear force?

    I'm a physics undergraduate student who has recently finished a special relativity class, but haven't done a nuclear physics class yet, so if I'm mistaken anything about nuclear physics, please object. I was pondering about a situation while doing my special relativity class which I haven't...
  30. jim mcnamara

    Exploring Epochs & Correction Factors for Tropical Year

    Using this: http://scienceworld.wolfram.com/astronomy/TropicalYear.html I derived this unix C code, which duplicates expected outputs. Note the constant T which is a correction factor for the epoch based in 2000, or so I assume because 2451545 is Jan 1 2000. And I have about epochs in...
  31. K

    Help regarding 'Interferogram Phase Correction'

    Hello! I have a question regarding 'Interferogram-Phase-Correction'. Does anyone can refer me to some info regarding the extraction of information after "Michelson - interferogram - phase - correction"? If additional information regarding this or maybe this is not clear enough please tell...
  32. E

    Signal processing and data correction

    Is it possible to perform some form of data correction by finding the variance/std dev and covariance? I have a bunch data all related to a specific observation. For test purposes, i have 1000 samples of each data for certain condition. I can find the covariance between each data under this...
  33. L

    Correction on 9.73 Statistics on Large Sample Tests of Hypotheses?

    1. Homework Statement (I forgot to write out the problem statement in previous post) How do California H.S. students compare to students nationwide in their college readiness, as measured by their SAT scores? The national average scores for the class of 2003 were 507 on the verbal portion...
  34. N

    Why is a Capacitor Added in Parallel for Power Factor Correction in an RL Load?

    Hey, Theres something I'm curious about. If you consider a voltage source connected to an RL load , in order to compensate for the lagging power factor produced by the inductor in the load all the textbooks say we should add a capacitor IN PARALLEL to the load. Wouldn't a capacitor added in...
  35. F

    Cheap Static Correction Measurement for Dog Shock Collars

    Is there a cheap way to measure static correction on a shock collar for dogs? Thanks in advance, Mac
  36. T

    Exploring Relativistic Corrections in Physics: Applications and Significance

    Relativistic Correction I had a few questions about Relativistic correction: A. Where in physics are Relativistic corrections made? and why? B. What are some examples of technologies that must apply Relativistic corrections? and why?
  37. T

    Exploring Relativistic Corrections in Physics: Examples and Applications"

    I had a few questions about Relativistic correction: A. Where in physics are Relativistic corrections made? and why? B. What are some examples of technologies that must apply Relativistic corrections? why?
  38. V

    3rd order energy perturbation correction

    Homework Statement Derive the general expression of 3rd-order perturbation energy for a non-degenerate quantum system. Homework Equations for nth order we have (Ho-Eo)|n>+(H'-E1)|n-1> -E2\n-2>-En|0>=0 (given) also, <0|0>=1, <1|0> = <0|1>=0, <0|2>=<2|0>=-1/2<1|1>...
  39. B

    Magnitude (electric charge: need correction)

    Homework Statement Calculate the magnitude and direction of the Coulomb force on each of the three charges shown in Figure P15.10. http://www.webassign.net/sf5/p15_10.gif thats 3 cm if its to small to see. 6.00 µC charge Magnitude 1.50 µC charge Magnitude -2.00 µC charge...
  40. B

    Background Correction in Rutherford Scattering Apparatus

    Hi guys, Do you know what is meant by background correction in an Rutherford scattering apparatus. i can't even start doing it because i don't know what is a background correction, is it the average count / area of alpha particles on a detector?
  41. L

    Calculating a correction factor

    I am trying to calibrate this circuit, and it is hooked up to a voltmeter and also a power supply. When the circuit is horizontal, the voltmeter is supposed to read zero both in the x and y direction. Here, the x-direction is determined by tilting the circuit up and down and the y-direction is...
  42. T

    Calculating Bolometric Correction for Cepheid Variables

    hi can the bolometric correction be calculated if all i know of a cepheid variables properties are its period? for example, if the cepheid variable has a period of 3 days i can use a period-luminosity relationship to calculate the luminosity, from here i can then calculate the bolometric...
  43. R

    End Correction: An Idiot's Guide for Understanding Standing Waves

    Help with understanding end correction I missed a lesson at school on end correction of standing waves in pipes. I have a vague understanding of them, but can anyone give me an idiot's guide to end correction? Most websites I've had a look at haven't been too helpful in explaining it. Now...
  44. P

    Correction to temperature measurements

    One problem in past climate models has been that the troposphere did not appear to be warming as much as expected. A new report in Science indicates that a correction factor should have been applied and was not. When the correction factor is applied, warming in the troposphere is observed. I am...
  45. B

    What is the Meaning of End Correction?

    I wonder if someone could explain what is meant by 'End Correction' Any help is appriciated! thanks
  46. P

    Can Quantum Error Correction Revolutionize Computing?

    Hello people, Not sure if I'm posting in the right place, but I have read quite a few posts since joining and have to say this forum is of a very high standard, well done. I'm a final year student working on my dissertation on Quantum Error Correction and was just wondering if anyone had...
  47. A

    Metacentric height correction due to free surface effect

    Hi regarding the above subject there is a conflict of opinion between me and a collegue. So i need your help In order to calculate the corrected metacentric height of a floating structure that have a open compartment, filled with water, that is located eccentrically i have to use GMnew = GM -...
  48. K

    Correction to length contraction equation

    Suppose an electron has a small radius and we look at its radius and mass from the point of view of special relativity. Let's use the idea of (mass x length) = constant. No quantization. Is the contraction to zero radius at c a problem? If so then we can guess how to stop it. One way...
  49. Y

    Lasers are being used to do eye correction

    Lasers are being used to do many things now: eye correction, speed scaning, cutting, and now even to create iron! Scientists now use lasers to heat up hydrogen so they fuse into helium and all the way up the table into iron, just like stars. I want to know if lasers have mass. I know that...
  50. nucleartear

    Gibbs Paradox: Exploring the Logarithm Correction

    What I have not seen in books about the Gibbs paradox is that it doesn't exist if we make the Gibbs correction at the logarithm of the Z function, not at the Z function itself, in that way: \ln Z_{i} - \ln N_{i} ! where N_{i} is the number of identical particles of class i, where there...
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