Weak Definition and 503 Threads

The electromagnetic force is mediated by photons , which have 0 mass. so electromagnetic forces have infinite range. the weak force is mediated by three intermediate bosons, W+, W-and Z0 particles. these all have mass, the two W particles about 80GeV and the Z is about 90GeV. the bit below is...

I know this may be a naive question but here is my situation. I'm going back to undergrad this fall for a 2nd bachelors degree in Physics, so I'm planning on getting a head start by taking Calc II and Physics I with calc at a community college this summer. I plan on applying to grad school in a...

Homework Statement A particle is in a box of length L on x-axis. 0<x<L. What is the first order shift due to V(x) of the wavefunction? Homework Equations H=p2/2m Sin=sqrt(2/L)cos(npix/L) En=n2pi2hbar2/2mL2 V(x)=kx2/2 The Attempt at a Solution I'm super confused because the shift in the...

Homework Statement A particle is in a box with length L. A spring attached to the particle is fixed at x=0. How can we determine the potential due to the spring is weak? Homework Equations H=p2/2m Si(x)=sqrt(2/L)sin(npix/L) En=n2pi2hbar2/2mL2 V(x)=kx2The Attempt at a Solution If I base...

Is it possible to do well in upper level physics classes with a weak foundation in differential equations? I've never taken a DiffEq class. Some of the extreme basics were covered in Calc 2, and there will be a crash course in DiffEq in my Mathematical Methods in Physics class (using the Boas...

is the weak nuclear force what binds atoms together to make molecules?

Hello; I don't know a lot about the weak nuclear force, so I wanted to ask if some of these statements are correct; -The weak nuclear force is what is responsible for radioactive decay -When alpha and beta radiation occurs, the W+, W- and Z0 bosons are what carry the radiation force -The...

The question below is a rather theoretical one and does not concern any actual calculations. So I have decided to abandon the traditional format. In the past few weeks, I have designed and carried out a lab in which I would test the resistance of a strong acid (0.5 M HCl), a weak acid (0.5 M...

I've had trouble understanding how the weak interaction could be field based, like classical gravity, or electromagnetism. My limited understanding of the interaction so far had been that left handed leptons and quarks would have an event spontaneously happen to them (such as decay). I thought...

You still have not answered the question; What are the two forces of the weak angle coupling constant? We have spin and charge as known forces. If you can not specifically identify spin or charge as one of the two forces involved in the weak coupling constant than for all you know there...

Homework Statement hy guys ,help me prove if x<y and n is odd ,then xn<yn i have solved this . .but a question in below Homework Equations The Attempt at a Solution if 0=or<x<y then xn<yn (i have proved this ) and if x<y<or=0 we can say 0=or<-y<-x it implies -yn<-xn...

Hi! My lecture notes make me really confused as to what is the difference between weak and strong equivalence. I also read about it on wikipedia, but I'm still not sure. Can anyone give an example how in real life (thought experiment?) of what weak and strong equivalence is.

Just a thought: If we could identify the position and velocity (via weak measurements) of a particle at some instant, and its future evolution is fully determined (at least in principle, not in practice), then can we extrapolate this to surmise that all events are are inherently deterministic...

I have 2 questions... I was told that the transmutation of Li-7 to Be-8 by proton collisions at energies below the classical barrier verifies the QM description of the weak interaction cross section. Firstly, I found the leap in logic very confusing - does the weak force have a role in...

Homework Statement A 0.149 g sample of a weak acid (HA) requires 16.80 mL of 0.110 M NaOH to completely reach the equivalence point. What is the Molar Mass of the acid? Homework Equations ... The Attempt at a Solution i don't think i did it right. i just did 0.0168Lx0.110M=...

Homework Statement Consider a titration in which 50.00 mL of .450 M benzoic acid, C6H5COOH, is reacted with 0.2000 M Ca(OH)2. What will the pH be when 60.00 mL of Ca(OH)2 has been added?Homework Equations 2C6H5COOH + Ca(OH)2 -> 2 H2O + Ca(C6H5COO)2The Attempt at a Solution I have determined...

Hi, Im currently writing a theory section for the W and Z bosons mini thesis type project, I am looking to fully cover the main topics in this area and am wondering if i am missing any or need to re-order things: Overview of elementary particles Symmetry and conservation laws Gauge...

Homework Statement I'm totally lost about this. I know the properties of binary relations (or at least I think I know them, what it means to be transitive, complete etc). This exercise asks me to show that P and I are strictly partial and equivalent respectively when P and I are defined...

Hi ! i am new to these forums.. so i just want to ask whether i am posting my query in the correct forum?? I have a doubt regarding this weak acid - weak base buffer. When the moles of Acid > Base, We use the formula pH = pka + log10 ([salt]/[acid]) to calculate the pH of the Acidic Buffer...

what is the weak field limit?

For the process where two neutral pions turn into two charged pions, I noticed that this can occur through both the strong and weak interactions. Through the strong interaction it is a 4-pion vertex, and through the weak interaction it involves a virtual W-particle. If I were asked on a quiz...

When it is said that the relative strength of weak interaction is \ 10^{-5},what does this mean? On calculation I am getting \alpha_w=\10^{-3} with \ G_F=\ 1.16\times\ 10^{-5} \ GeV^{-2} I had an impression that \alpha_w should be \ 10^{-5}.Which one is correct?

Hi again, Thaks for previous help. I am self studying GR using Schutz and Dunsby's webpages & notes. I am stuck on a step in the derivation of the weak field approximation. They approximate the metric with g[a][/b]=n[a][b]+epsilon h[a][b] In step 7.30 the partial derivative h[i][0],[0]is...

I don't have a formal education in physics so please excuse my ignorance. I had an idea and was wondering if as matter gets stretched and spun toward the event horizon is it possible that as it is consumed the weak force is repelled while everything else gets consumed? I hope that makes sense...

The production of a muon/antimuon pair from an electron and positron or... The production of a neutrino/antineutrino pair from an electron and a positron? The only weak interactions I know of are beta-minus decay, beta-plus decay and electron capture. All the sources I've found say they...

As most of you probably know, the WEP states that the intertial mass and gravitational mass of any object are equal. This principle has base in Galileo's observations, that all free-falling objects have a constant acceleration. What I would like to get clear is the order of arguments that leads...

What do you think these Weak Measurement, Quantum Uncollapse Tests. Re-write QM?? http://www.scienceagogo.com/news/20080706233709data_trunc_sys.shtml http://www.sciencedaily.com/releases/2008/08/080806140128.htm Are they going to re-write the quantum mechanics?

How is weak isospin conserved? Before spontaneous symmetry breaking, it's conserved - by construction. Afterwards, the vacuum expectation value of the Higgs breaks the symmetry. It's the mass terms, and interactions of the Higgs field, where the symmetry is broken, and so there is no...

Hi All, I would like to appreciate functional analysis in a rigorous setting, to enrich my “engineering” understanding of the matter. So far I have firmly understood that: 1) for any Banach space a dual space can be defined 2) this brings with itself the notion of weak and weak*...

Homework Statement Consider the Galerkin discretization of an abstract variational problem where the Hilbert space V is separable. http://en.wikipedia.org/wiki/Galerkin_method#Introduction_with_an_abstract_problem" Each of the subspaces Vn is generated by the first n terms of a sequence...

As we know:Gravitation is attractive force, electric force is attractive and repulsive force. Weak and strong interaction are attractive or repulsive force?

I hope this is the right section for this topic... I'm not a student of physics, I actually study engineering, and there's something I've been wondering for a while. I know - more or less - inside and out two of the four "forces" of the universe: gravity and electromagnetism. However, since I...

What is Universal weak coupling hypothesis?

An idea crossed my mind on how to explain the weak equivalence principle(WEP) without using the gravitational law: F=G m1m2/r2 Part of what WEP sais is that assuming we are in a uniform gravitational field, if we let two objects of different masses, they will fall with exactly the same speed...

Can light travel through an atom? If yes, how will it emerge? If no, why not? Will it interact with any subatomic particles?

Homework Statement hey guys, I've got a prob, i kinda know how to do this question but i can't get past the first step. i want to write an equilbrium expression by I am not sure what the chemical reaction is. any help would be good Homework Equations A solution of a weak acid, HCOOH...

Homework Statement In my lab, it says that i have to calculate the pH and the Ka of an unknown acid of known concentration (0.20 mol/L)..however, the part that is confusing me is that we first had to obtain 40 mL of that particular unknown acid... Homework Equations The Attempt at a...

Homework Statement " Which of the following best describes a weak acid?" A. Its 0.10 M solution will have a pH = 1.00 B. It may be very soluble, but only partly ionized. C. It must be very soluble and completely ionized D. It must be of low solubility and completely ionizedHomework Equations...

Can someone explain how one derives the 4-point Fermi interaction from the full Standard Model? I understand you set up a cutoff \Lambda, and the cost of this is that the coefficients of all terms in your Lagrangian become functions of this cutoff, and you also have an infinite number of new...

Could someone explain to me what it means for a theorem to be a strong(er) form or a weak(er) form of another theorem? I've heard these terms used over and over, but never bothered to ask. If I had to guess at a definition, I'd say that if q is a theorem then we say p is stronger if p...

I read two articles recently and I am wondering if I have the correct interpretation of them. They deal with joint weak measurement and Hardy's paradox. Is the result of the "Direct observation of Hardy's paradox by joint weak measurement with an entangled photon pair" paper indicating...

(correct me if i state anything wrong) the weak interaction only works on left handed particles and right handed antiparticles; so if there was a right handed muon what would it decay into? and is it possible for a left handed particle to become a right handed particle? (not just a change of...

i can't seem to find any straightforward descriptions of it for why+when its needed. Plus I am really confused as to how they weighed the bosons if they only exist for less than a nanosecond. I am more interested in finding out how scientists figured out the bosons weight than anything

Homework Statement 2.00M chlorus acid and 2.00M formic acid are mixed. What is the pH? Homework Equations Ka of chlorus acid is 1.1×10-2 Ka of formic acid is 1.78×10-4 The Attempt at a Solution For chlorus acid with quadratic equation to find x: x²+0.011x-0.022...

What exactly does the weak interactive force act on? Does it act on Mesons and Bosons?

Hello, I'm a novice in this field, but there is one thing I have been wondering about for a long time. Maby you could help me understand it? I think it must be enough to only use the quark-quark forces to describe all nuclear reactions, even things like n-> p+e+v, but it is perhaps a lot more...

Homework Statement How can you determine if an acid is strong or weak given the titration curve? I need two reasons. Homework Equations The Attempt at a Solution 1 Reason that it is weak is that its being titrated by a strong base and the equivalence point is above pH of 7...

I understand the concept of a spacetime (future) singularity in a BH I understand what is a ring singularity in Kerr'sblack hole Could anyone explain (for dummies) what is meant by "weak" and "null" singularity?

Let LG be the base point preserving loops (it's a Hilbert manifold). So LG = { f : S^1 -> G s.t. f(0)=1 } where G is a connected, simply connected Lie group. LG is embedded into the (vector space) Hilbert space L^2[0, 2pi] given by f |--> g(t) = f '(t)f(t)^-1 Is LG a closed subset of...

Charge is conserved in particle interactions. Color is conserved. Inerial mass is conserved locally. Is weak hypercharge conserved?