Standard Definition and 1000 Threads

Does anyone know where to find the standard model of particle physics shown by Brian Cox in his LHC TED talk (found around 6:35 here: http://www.youtube.com/watch?v=_6uKZWnJLCM)? I'm looking to print out the equation but can't find it anywhere. Thanks

Why is the standard form of a linear equation ax + by = c? What is the significance of this particular way of writing the equation that makes it "standard"? When we graph a line, we always transform the equation into something else, such as the point-slope form, y = mx + b. In other words...

General Physics: Halliday, Feynman Classical Mechanics: Gregory, Kibble, Goldstain, Landau Waves: Main, Pain, Coulson, French ElectroMagnetism: Reitz, Griffths, Jackson, Schwinger Optics: Born, Hecht Relativity: Resnick, French, Russer, Wheeler Quantum Mechanics: Merzbacher, Gasiorowicz...

Homework Statement From the standard potential Tl^+ + e^- -----> Tl (solid) E^o= -0.336 V Determine the standard potential of Tl_2S (solid) + 2e^- -----> 2Tl (solid) + S^2^- Given that the K_sp for Tl_2S is 1.2x10^-22 ***I cannot get latex to put the -22 in the exponent. The Ksp is...

Nice picture of quasar accretion disk---pat on back for standard cosmology in Nature The 24 July issue of Nature reports some beautiful observational work, using a polarized light filter. Actually able to SEE the hot blue accretion disk whirling around a supermassive black hole at the center of...

Hi, Just having a little trouble understanding the concept of standard cell potential...what is it exactly? I understand that it is compared to a reference potential of 0 for the reaction 2H+ + 2e- -> H2(g). But what does it mean when a given reaction has positive potential (other than the fact...

Often I will hear quoted such and such Pulsar has a period of X and a Pdot of Y. However this is somewhat ambiguous to me. If the period is changing, then how does one quote its period? Obviously, by using some unambiguous standard that I am unsure of. Is the reported period (in a paper...

Standard deviation and mean - "combining" the two Lets say one was to have a range of data, with the mean and standard deviations for the different subsets of data. The "best" subset is that with the lowest mean, however how do I include the standard deviation when making my decision. For...

Weil's Conjectures and Grothendieck's "Standard Conjectures" All, Grothendieck claimed that his "standard conjectures" imply the Weil conjectures. He showed the proof to a class that he taught one summer in the 1960's and he asked one of his students, Kleiman, to write it up and publish it...

Homework Statement Problem 1.2 from the book Introduction to Quantum Mechanics (2e) by Griffiths: Suppose a rock is dropped off a cliff of height h. As it falls, a million photos are snapped, at random intervals. On each picture the distance the rock has fallen is measured. a) Find the...

This might be embarrasingly easy or impossible; I've been a computer programmer for too long since my statistics classes to tell for sure :blushing: I have a set of records with the following data for each record: interval, mean speed, standard deviation of speed, number of observations...

PBS “Ghost Particle” neutrinos showing Standard Model wrong Tonight and tomorrow (Sunday), PBS television is rebroadcasting “The Ghost Particle” on the neutrino work by John McCall and Ray Davis that showed the Standard Model Theory was wrong and made incorrect predictions about neutrinos...

I don't understand where to even start with this problem. This book has ZERO examples. I would appreciate some help. Show that by a suitable scaling of the space coordinates, the heat equation u_{t}=\kappa\left(u_{xx}+u_{yy}+u_{zz}\right) can be reduced to the standard form v_{t} = \Delta...

"standard perturbation theory" - what exactly is meant? hi, could someone please help me out with the question in the title, in the following context: the quantization around trivial classical solutions can be done via the minkowskian path integral, while instanton solutions arise in the...

Hey i was wondering if anyone could help me with this question at all? I don't have a clue about the calculations and would be grateful if it could be explained to me! I'm really struggling! Thanks Some light emitting diodes are tested and a sample is found to have a mean lifetime of 2048...

[FONT="Comic Sans MS"]Ok i am having a hard time with this one. Find the product z1z2 in standard form. Then write z1 and z2 in trig form and find their product again. Finally, convert the answer that is in trig form to standard form to show that the two products are equal. z1= 1+i, z2= 4i

Loll will deliver three one-hour talks at Oporto in mid July Here's the abstract Renate Loll, Quantum Gravity from Causal Dynamical Triangulations Abstract: I discuss motivation, implementation and results of the nonperturbative approach to quantum gravity based on Causal Dynamical...

Hello! My teacher gave the following problem.. I am pretty confused as to where to start from... can anyone help? Find the standard matrices for the derivative and integral operators for polynomials up to degree 4. Use vectors of length 5 to represent the polynomials Thanks in advance...

If Z is a random variable having the standard normal distribution, find P(Z\geq-.79) So I punch it into my calculator nmcdf(-.79,infinity,0,1) & I get the answer .7852 The book however has the answer .2148 (essentially 1-ans). Which is what I don't understand... Have I forgotten something...

M theory is an 11 dimensional theory which in some limits can reproduce all the five 10 dimensional string theories, and also 11D supergravity in some other limit. The mantra of string theory has been, for years, "we do not know what M-theory is". On the other hand, 11 dimensional space is...

but only knowing the previous standard deviation, the previous mean (and the sample to be removed). does anyone know how to do it?

I can't seem to get an equation for this reaction.Potassium Biphthlate + Sodium Hydroxide give me what? Both are dissolved in water. Need to figure out the equation to standardize the sodium hydroxide. NaOH + KHC[SIZE="1"]8H[SIZE="1"]4O[SIZE="1"]4 -->All are aqueous. EDIT: read the sticky...

I'm kinda confused about how standard candle works. I know they use type 1 supernovae since their luminosity is the same everywhere but how do scientists know how far a star is if their luminosity is the same everywhere. I don't really get how they measure distance with it. Can someone please...

[SOLVED] indentation standard http://en.wikibooks.org/wiki/LaTeX/Document_Structure It says there that "By default, the first paragraph after a heading follows the standard Anglo-American publishers' practice of no indentation." I have never heard of this so-called standard! Has anybody...

Change the equation to standard form. y = x^2 + 8x + 20 I thought this was the standard form for parabolas?? I tried this as the answer but it said it was wrong y = (x+4)^2 +4 Thanks for the help! :-)

Homework Statement This is not a problem, per se, because it is part of my Lab. We're calculating the standard enthalpy change of formation for solid Ammonium Chloride. To do this, we're using four separate rxns, and totaling their individual standard enthalpy change of formations. For two...

We need a stickythread that makes this point. Prominently so it catches newcomers' attention. Otherwise questions about it keep coming up. If anyone wants to try saying this in an especially clear way, please go ahead. Everybody I can think of has made this point----the mods, the professional...

Hiya, I've just done a line integral question, and the final part of the question is, "by applying a standard test, determine whether the value of the line integral depends on the path followed between the given initial and final points." The only standard test, I know, is dq/dx, and dp/dy to...

Where can I get a list of standard sizes for I beams? (Preferably in SI units, just to save me time)

Can someone point me to good books or good web links that deal with standard light sources (standard lamps to be precise) used in spectroscopy?

Has anyone read this paper? Shifting the Universe: Early Dark Energy and Standard Rulers Authors: Eric V. Linder, Georg Robbers Comments: 6 pages, 3 figures Subjects: Astrophysics (astro-ph) The presence of dark energy at high redshift influences both the cosmic sound horizon and the distance...

is there a time operator (not the time evolution operator) in standard qm? I'm a bit curious as while it might not matter all that much for non-relativistic qm it seems as if it would be important to have some measure of a the probability that a particle is at a given place and time. If I...

I take it that the standard basis vectors of C^n is the same as the standard basis vectors of R^n? It would seem so as scalars in C^n are complex numbers.

At this point, i am not yet convinced that enough data is in on the subject of dark matter/dark energy to support expansion of the standard model to include them, but, then, i am just a lowly layperson... How do you guys see dark matter and dark energy fitting into the standard model? how...

[SOLVED] What are the standard units for inertial mass and gravitational mass? 1. What are the standard units for inertial mass and gravitational mass? And also apparently gravitational mass can be measured without gravity how can it be done? Thank you very much. My teacher said a hint is in...

So, what will we see at the LHC if the Standard Model is all that there is to physics at this energy scale? What if there is no supersymmetry, no strings, no loops (or at least no emergent behavior that would be seen here)? Are we going to be able to tell if those theories are false pretty...

I'm trying to solve some organic chem reactions out of a new textbook with an answer key that's confusing me. All three rxns involve anti-markovnikov addition of HBr to an alkene using a peroxide. A peroxide radical generates a bromine radical, the electrophile which then adds to the least...

In doing a problem, I considered N (a large number, in the range 100,000-1,000,000) raindrops, falling into A (fixed at 100) segments on a roof, distributed using a random number generator I programmed. In considering the number of raindrops that fell into a given segment, the average would be...

There is a bit of data and literature that shows the standard heats of formation for various uranium compounds including UO3, U3O8 UF6 etc. However there appears to be nothing on ammonium diuranate which is one of the most common intermediate forms produced by precipitation. The ADU as it is...

Just looking for ideas if it does. I've looked at closed string tachyon condensation and it apparently excites the graviton as it's also closed string and this can warp spacetime. I (think) see a flaw in symmetry here as if I were on earth, feeling the gravitational field strength, I'd...

You are given a chance to fly back in time with no worry over changing history in bad ways. Knock knock and you enter a college looking for famous Isaac Newton, age 45, in person. He's a real fun in every way - mechanics, theory of gravity, celestial mechanics, calculus, the queen. Also he...

Homework Statement Suppose a sample containing 0.600 ppm Selenium is analyzed by a method for which the standard deviation of the population is known to be 0.005 ppm. 1) What is the the probability that a single determination would return a value less than 0.590 ppm? 2) What is the probability...

in my analytical chemistry review, this question cropped up. the first part was simple, but the second part has me confused to no end. I've tried playing around with the math as well as scouring my textbook for answers. help! what is the probability that a single determination of a value is...

There are two different problems that I am confused with: 1) The taste of mature cheese is related to the concentration of lactic acid in cheese. Use the concentrations of lactic acid in 30 samples of cheddar cheese on page 15. Well, what's important is that using all the numbers it gave...

Hi, I work with valves and one of our customer send me an oring specification. this file says that the index (or coefficient) of cold is -50°C and it was measured with differential scaning as per VNA 675116. I have never heard something about it. thanks

hi, just wondering if there different ways to calculate the standard error for large and small sample size and if its so wats the formula we use? please give me a hand, hope this question makes sense. cheers

[SOLVED] Standard error Homework Statement A student determined the following values for the wave speed; calculate the average value of the wave speed and its standard error 50.8, 50.6, 51.8, 52.0, 50.9, 51.6, 51.3, 51.5 Homework Equations avg wave speed = 51.3 The Attempt at a...

Sometimes, when repeated assays are to be performed, the sample size is standardized and chosen such that the ultimately measured quantigy is numerically equivalent to some other desired proportionate quantity. suppose the sulfur content of a mineral sample is determined by complete...

[SOLVED] Quick question about finding standard deviation Now I know that \sigma=\sqrt{var(x)} which simplifies to this expression : \sigma=\sqrt{\frac{1}{N}\sum_{i=1}^{N}(x-\overline{x})^2} can someone show me how they got such an expression? and in chemistry I have to use a standard...

dark matter/virtual particles in standard model?? where do dark matter, dark energy, and virtual particles fit in the standard model? if those three mystifying concepts are necessary to explain the universe and its operation, why are they not included in the standard model? IMHO, all three...