Mechanism Definition and 511 Threads

"Although the evidence for the Higgs mechanism is overwhelming," As far as I know there is no evidence for the Higgs mechanism. The only potential evidence is the Higgs particle which has not been found! Is this also SM propaganda?

"The Higgs mechanism in the standard model successfully predicts the mass of the W±, and Z weak gauge bosons," How does the higgs mechanism predict the masses of the W & Z? The Higgs has no specific coupling value to any particle and it is the coupling value that gives the mass value Is...

Homework Statement "Given the rate law for the following equation is Rate = k[A][B2] 2A + B2 ------> 2AB Suggest a mechanism for the reaction Homework Equations I have no clue; I was absent for 2 weeks and now have to teach myself the first two units, I've been...

I need to study about the variable pitch propeller and its mechanism of adjusting the angel of the blades. And also about the materials used to make propellers and their benefits.. can someone please help me to find sources such as images/videos about the variable pitch propeller? or...

hi , I want to ask a question ... . What is the mechanism of this rxn ? CH3CH2OH +MNO2 -------> CH3COOH I want to help you to find out the mechanism quickly , please

Hi, I'm building an battle robot. The total weight of the bot is round 40KG. I want to implement an steering mechanism for my bot. For that i found Rack and pinion arrangement. But the problem in that is, how to make an DC motor to rotate just for a few revolutions? Another method which can...

Hi, I am a hobbiest and I am trying to build a weight sorting machine that sorts out weight object according to their weight. So, basically, there are carriers that are used for transporting weight object and I attached a guilde piston mechanism underneath the carrier so that the carrier could...

Attached is a drawing of my Proposed mechanism. Am I right to say the period of the waves could be determined by changing the length of the Rod? Any comments on the design?

(different guy using the same user name) I am looking for a simple engineering software to model crank and rocker, gear, crank and slider, worm gear, scotch yoke, cam and other generic mechanisms. Most important is crank and rocker. Maybe some hydraulics and pneumatics. Something my...

Hi, I'm currently looking into reflectivity and emissivity of metals in sunlight. However, I can't quite grasp how the mechanisms of reflection and emission differ. Emission obviously occurs because an electron is exited by a photon and then is de-excited and emits photon or photons. However...

Hi everyone! Can somebody briefly explain me what the GIM Mechanism (Glashow, Iliopoulos, and Maiani) is and why does it not allow FCNC transitions at tree level. Thanks in advance!

I've been fascinated by the idea of using a nuclear reactor (either pebble-bed or particle-bed)as a powerplant for an aerospace vehicle, but of course there is the problem of coupling the thermal energy to the propellant flow by direct contact without having bits of radioactive debris from the...

how does the exchange coupling mechanism work that produce the ferromagnetic properties of materials?

Well, if we say that evolution is some gradual change of an organism from some form S to S* over a period of time. should there be some mechanism already in place to even allow evolution to occur? To be even more clear. For organism of form S, and successive generations S* , S**...

Starting out with TiCl4 and triethylaluminum, I understand how the triethylaluminum alkylates the TiCl4 and creates a polymeric TiCl3, but then an ethene molecule coordinates with a vacant site on the alkylated TiCl3? I thought titanium's highest oxidation state was +4?

Hello there, I am in no way shape or form a scientist/engineer. (I am making a prop for a film) I am filming a xylophone and need a very smooth movement of the stick/drum stick hitting the xylophone plate. (The movement has to be quite small from 10cms between each point, up and down) I came...

It is well established that the cosmological redshift causes both the wavelength and the separation of photons to increase in proportion with the increase in the cosmic scale factor a. The traditional explanation for the mechanism of the redshift is that ‘expanding space’ progressively forces...

I have a .380 auto handgun which uses a #8-32 NC cap-head screw to retain the trigger guard. During firing, the mechanical shock of the cycling action serves to rapidly loosen this screw regardless of the torque used to tighten it down. I cannot use a standard star washer because they're...

hey...I have to develop a suction mechanism for sucking air from a 20 meter high stack to the ground level and at 20lpm outlet flow rate. I don't know the difference between using a suction fan or a pump and which of the 2 would be better .also how to account for all the losses that will be...

Homework Statement Need to prove that a slider crank mechanism fits the Grueblers eqaution, already done for a four bar mechanism no problem, however having some serious problems with the slider crank. If l is the number of links and j is the number of joints Homework Equations Grueblers...

What is the mechanism by which they adhere to each other, and what stops them from sticking together when say you put your hands together?

I need help understanding the Higgs mechanism: what is the Higgs condensate, what is the Higgs boson, why do only the W and Z bosons have mass, and how exactly do particles receive mass? thanks guys!

Homework Statement I am given isobutane as my starting material, Br2 and benzoyl peroxide as my radical initiators. My final product is the isobutane with Br attached instead of H. I have to design the mechanism. I have tried what seems like an endless combination of mechanism attempts...

Hello again! I have a question regarding the reaction of C6H5NH3 with NaOH to make C6H5NH2. How would a mechanism be written to describe this process? I know that C6H5NH3 goes from having a positive charge on the nitrogen and after it reacts with NaOH, C6H5NH2 has a neutral charge but not sure...

OIOIC is a completely new object-oriented mechanism for the C programming language. Using OIOIC, you can describe the flower, birds, grass, insects, trees, houses ... Using OIOIC, you can describe the elements, atoms, protons, electrons ... Using OIOIC, you can describe the earth, the...

Hey all, Our team is currently working on a project which contains the pullback mechanism like the ones you find in toys. We are competing against other teams and have a fun match at the end. The idea is to pull or push the vehicle back 1 meter and store as much as possible energy. We only have...

Hey guys. Can someone show me the mechanism for Aspartame to methanol?

Homework Statement What mechanism is responsible for the sequencing of amino acids? Homework Equations The Attempt at a Solution I don't quite understand, is it asking what is the procedure called that causes sequencing of amino acids?

Hello, I'm an electrical engineering student at Washington State University, and I am attempting to design a beer pong (more properly known as beirut) playing robot. It won't be completely autonomous, as you will still have to tell it when to shoot, and load the balls, etc. Anyway, all of the...

Homework Statement guys i have this past paper question "describe with the aid of a circuit diagram of twin fluorescent unit to be used in a workshop where rotating machines are widely used" can someone help me with this? i search google but couldn't even find about twin fluorescent...

Homework Statement Write a detailed mechanism for the following reaction: Attached picture Homework Equations N/A The Attempt at a Solution Okay, I know this is PART of the mechanism for the oxidation of a glycol by periodic acid which causes cleavage of the C-C bond between the...

I want to build a porter governor to control the speed of a shaft via a varible dia double cone pulley. The speed range to be considered is b/w 250-750 rpm. I would like to know the equations involved. My textbook provides theoretical equations, I would be obliged if I could get the actual...

In the brake shown in the pic, what ll be the point of application of force to disengage the brake(it is holding type brake). It is an assignment problem in machine drawing class, I have calculated the shoe dimensions, but I have no idea where ll the force be applied to disengage the brake. And...

One of the core concepts in electric field theory is that charges exert a force on one another: a positive charge "pushes out," and a negative charges "pulls in." What is the mechanism by which charges interact with one another? How does one charge "feel" the presence of another?

My first semester bio course is having us practice writing formal lab reports by doing some research through peer reviewed journals our university has access to and citing it in our paper. however something that keeps coming up in the papers I'm reading is something called "the carbon...

Hi guys, I've been dropped in at the deep end at work, tasked with designing a latching mechanism for an armrest on a luxury aircraft seat - It has to work on a remote latch principle, ie by pushing a sprung-loaded button downwards to actuate a link arm via a pivot, which then retracts the...

Homework Statement Show the complete mechanism for the electrophilic addition reaction of toluene and bromine, isopropylbenzene and bromine. Draw the structure of the intermediate hydrocarbon. Homework Equations None The Attempt at a Solution I am having a really hard time with...

There is an aspect of the Higgs mechanism I am troubled about. This applies to any theory with Higgs, but for sake of definiteness I will restrict the discussion to the Standard Model. The (unbroken) theory starts with a complex Higgs doublet, which corresponds to four degrees of freedom...

hi guys I am working on a project which requires the transportation of microalgae. I was suggested to use slurry pump for the same. however I wanted to know its mechanism of functioning before jumping on to its purchase. I was not ble to find a satifactory reaponse to my query. I would be...

Hi ... I was trying to figure out a mechanism which allows for up and down movement. I figured a piston with crankshaft... anyone has any other possibilities? Thanks

Hi, So if we have a two-step mechanism that goes something like this: 1) A + B -> C 2) C -> D ------------- A + B -> D and the second step is the slow step, the reaction rate would be r = k2[C] correct? Well, seeing as reactants A and B are zero order, varying their concentrations...

ORGANIC CHEMISTRY II Homework Statement I spent hours trying to figure out how to do this mechanism but I always get stuck. Its tricky and will make you think.. think you can figure it out? Homework Equations Figure out the mechanism just using acid (H+) The Attempt at a...

hello all i'm creating a prototype for a 3 wheeled car ( 2 wheels at the back & 1 wheel in the front ) motor with the 2 wheels in the back i want to test its stability so i want it to move in a straight line then take a curve can someone suggest a simple mechanism for the steering (from the...

Do you know an ebook about the dynamic analysis of a bar mechanism?Thank you.

Hi I wanted to know what is the exact mechanism of stabilizing Zirconia (cubic phase) by Yttria thanks :confused:

I have a project that I'm working on involving a rubber band powered vehicle. I have a pretty well developed design involving several methods of propulsion but my main concern is a trigger mechanism in which to release this source of power from the rubber bands. Im not sure whether to go...

Hi all, i have faced a problem in the designing stage of a machine. I need to use a mechanism to close a door (very small metallic door of about 20 grams) for a period of time(this period can go up to 10 or more minutes) and then go back to its previous position in which another door is...

I'm an undergraduate in physics, I'm on my 2nd year. I have to write this assignment about the Higgs particle and gauge theory. There are quite some things that are unclear to me however. Since I'm only on my second year I don't know a lot of deep math like group theory, just basic stuff. I know...

Non-Higgs boson process of the generating of elementary particle masses in QFT As is known in the experiments on LEP and Bevatron, Higgs's bosons were not discovered. It is supposed that an energy amount bigger than 160 GeV is here needed. But some scientists doubt the detection of Higgs in...

This is my question... For the alkyl halide tell which mechanism, E1 or E2, will predominate under both stongly basic (with large base) conditions and strongly acidic. Tell if each reaction is expected to proceed relatively quickly, moderately, or slow (based on sterics for E2 and carbocation...