Resonance Definition and 667 Threads

I'm obviously studying about neutrinos lately... So, I wanted to ask about the Glashow resonance. I don't understand what they mean when saying: http://arxiv.org/pdf/1108.3163v2.pdf (sec.2) Unfortunately I don't have access in the refs. If I understand this correctly, it says that the...

Hi everyone...I'm just looking nmr schemes, and magnets, and, at the same time, studying Physics II and electromagnetic fields at my faculty of electronics engineering. I know this may sound like a "dumb" question, and I don't want to sound like councited or similar stuff, but I was just asking...

Question: The Breit-Wigner cross-section for a resonance R is ## \sigma_{i \to f} =12\pi\frac{\Gamma_{R\to i} \Gamma_{R\to f}}{(s-M^{2})^{2}+M^{2}_{R}\Gamma^{2}_{R total}}## [1], where ##s## is the com energy squared, ##M_{R}## is the mass of the resonance , ##\Gamma_{R total}## is the total...

I am having trouble making sense of the frequency of oscillations for a cyclotron. What I don't understand is, if a the voltage difference of the two dees is switched twice ( each time the particles are about to enter them), then why is the frequency of oscillation the same as the frequency at...

Hi! I have a few questions about resonance: 1) What exactly is the "amplitude of driver of oscillation"? And why is the amplitude of the driven object equal to the amplitude of the driver right from the start when the driver frequency is 0? 2) Is the driven system originally oscillating? 3)...

Ｉ Want to analyze the decay from a excited nucleon to a nucleon and an Omega meson.I have seen a propagator which descripes a process : a→b+c (Eur. Phys. J. A16, 537–547 (2003), Covariant tensor formalism for partial-wave analyses ofψdecay to mesons ,B.S. Zou and...

What I mean to say is that why are some substituent groups such that(during resonance) the pi electrons' delocalisation is directed away from it while some groups are such that delocalisation of pi electrons is towards those groups? Can you kindly give some examples too?

And what are the conditions for resonance to take place?

Hi there I am currently doing a major thesis on the procedural generation of an acoustic drum kit, using PD (puredata). Now what I am actually doing is physically modelling the drum kit piece by piece, starting with the drum shell. I know that every aspect of the drum contributes to its complex...

I'm struggling in physics class, and I really need help with this question. "If you are holding a spring in your hand and making waves, describe how to make a standing wave at the 2nd resonance frequency (next frequency over the fundamental). Include a sketch with your answer." What does this...

Hi everyone. I'm just looking for an online description of the nuclear magnetic resonance machine, with explanations of all components, and their physical principles...anyone can help me? Giving me any link to a website talking about it? In addiction, could be this be a valid topic for a...

Homework Statement I need to draw NH4NO2 which is an ionic compound. 3. The Attempt at a Solution NH4 is fairly straightforward to draw, with one N in the middle and four H surrounding, and no lone pairs. The problem comes with NO2- which is one nitrogen bonded to two oxygens. However, one...

Homework Statement A certain spring elongates 9:0mm when it is suspended vertically and a block of mass M is hung on it. If driven by a force of variable frequency, at what frequency would resonance be obtained?a. is 0:088 rad/s b. is 200 rad/s c. is 33 rad/s d. is 1140 rad/s e. cannot be...

according to book "...Let us look at a particular wave crest generated at the left end of the string by a fork. It travels to the right end of the string, is reflected back, and is reflected again at the fork.Now it interferes with the next wave..." doubt: the fork keeps vibrating and keeps...

Homework Statement (a) Find energy of incoming beam that creates highest cross section (b) What are the differences in the two reactions, using quark diagrams? (c) What would the peaks of the two reactions be like? Homework EquationsThe Attempt at a Solution Part(a) [/B] Cross section is...

I finished reading my physics textbook chapters on waves and I think I understand how resonance works but I want to verify. PLEASE ;_______;

Can resonance occur at multiple frequencies for the same given instrument? For example, in a violin, each note on a given string (say A) resonates and is the loudest only at a specific point on the string. Since each note on the same string can resonate, and each note has a different frequency...

Homework Statement I have been trying to set up an LRC series circuit where in place of an inductor we have a pair of coupled coils. My aim is to determine the resonant frequency in the circuit when the voltage across the resistor or the current in the circuit is at a maximum. I am using a...

As in what are the conditions for resonance (i.e. in oganic chemistry) to occur? Sometimes it occurs, sometimes it doesn't; for reasons unknown. A little help please? :/:olduhh:

Homework Statement A resonance filter is a specific second-order digital system designed to attenuate all frequencies except at and around a given center frequency. The transfer function of a resonance filter is: H(z)=(1 - r)(1 - rz-2) / (1 - 2rcos(ωcT)z-1+r2z-2) where ωc = 2πfc, where fc is...

In the reaction :e,p→e,p,η; (p,η)is called a "baryon resonance",a state of which is "S11(1535)". (http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.86.1702) In Particle Data Group,there is an excited nucleon N(1535).Are they the same? But how could a (p,η)resonce be called excited...

Homework Statement https://s.yimg.com/hd/answers/i/582779fb3e0b4cecab74f7adb74ed84e_A.png?a=answers&mr=0&x=1422153107&s=7d575e72049bd930d0e263cbd57eff58 The Attempt at a Solution I have attempted to solve it. But I don't know what I'm doing wrong.

I have only just found out about inductors, and am trying to figure out how a circuit with an inductor and a capacitor could change dc current to ac current. With the set up of the circuit, would it suffice just to have the dc supply with a 'gate' that stops/allows through the dc current with a...

Homework Statement Calculate the lower limit of the electron scattering time in a material placed in a magnetic field of 1 T which is necessary to observe cyclotron resonance. The electron effective mass in the material is 0.06 ##m_o## (where ##m_o## is the free electron mass).Homework...

Homework Statement http://i.imgur.com/FxuxHjW.png?1 L = 1.6 mH, C = 100 μF. Determine the frequency at which the total current will be 0. (The picture shows 3L, which is 3*L, so 3*1.6 mH.) There's also a hint "Use the vector diagram." The result is 2.5 kHz which I cannot get. 2. Homework...

Arduino DUE based project for testing amplitude-phase response of the sensor or circuitry. Resonance frequency detection based on zero phase crossing, range up to 250 kHz. Check it out : https://coolarduino.wordpress.com/2014/12/24/lcq-meter-amplitude-phase-characterizer-piezo-tester/...

This is a concept I have never really understood. I mean to say is how can we include such a thing in a theory? How can we use them if we know that they don't actually exist? Are they some sort of calculation tool?

17:47 - dlbeeson: Is there any benefit of setting capacitance of an LC tank to resonate an inductor at its natural physical resonance frequency, like a tuning fork frequency? Like a brass pipe hanging on a string in a wind chime, the inductor must also have some physical resonating frequency...

Homework Statement This is for my differential equation project and this is the last part of the question. We know that the R=2 and C=0.001. We are given the equation: Q''+(R/L)Q'+(1/LC)Q=(117/L)sin(120*pi*t) We want to find the value of L such that we maximize the amplitude of the steady...

Hi guys, this is the first time I post a thread here. I have a problem that maybe be simple for your guys. If the force as the attached image shows is applied to an object and the frequency of the force equals to the resonant frequency of the object, will resonance happen? If will, will the...

Can someone please explain the significance of resonance levels that forms when electron collides with atoms. How this resonance levels are different from other levels ?

Hi, Considering a transverse wave on a string fixed at both ends... I understand that a wave summed with its reflection will produce a standing wave at any frequency. Is it correct that this standing wave is resonating only when that standing wave has nodes at each end? (Well not necessarily...

Homework Statement A voltage source is connected to a series LC circuit. The frequency of the source is resonant. The voltage amplitude of capacitor is 1V. Find the average power in the circuit. Homework EquationsThe Attempt at a Solution I realize that if there is no active resistance the...

Hi All, I am glad to have found this site as it offers a great range of information. I have looked through similar threads before posting this and didn’t find anything that answered my questions. I am to build an induction heater(cooker type) using a half bridge series resonance circuit as a...

Homework Statement One end of a long pipe is open. The other end is closed by a piston, which can be moved along the pipe, varying its distance from the open end. Although the pipe is filled with air, the speed of sound under the conditions inside is yet to be determined. A speaker near the...

Discharging a capacitor through an inductor creates oscillations. This is about as much as I understand about it. I'm having a hard time explaining my question so I attached a pic. My questions: 1. In circuit A, are there oscillations in the inductor as the battery charges the first capacitor...

Hi, I am trying to understand how precisely a voltmeter is used to measure the resonant frequency of a sound wave in a helmholtz resonator. Is it simply that the maximum voltage corresponds to the resonant frequency? A detailed description or external link would be great. Many thanks.

Homework Statement measure the velocity of sound in the air using tuning fork and a pipe closed at one end method a: End Correction involves applying a correction factor to the first resonant length based on the diameter of the tube used. method b: Second Resonant Length involves finding two...

I've been reading lately in particle accelerators and electrons and it got me wondering. How do electrons induce resonance in a cavity resonator? Do they have to first be accelerated to one of the walls of the cavity where they then bounce off toward the other wall?

Hello Physics Forum! I have a question: The problem: For a lightly damped oscillator being driven near resonance in the steady state, show that the fraction of its energy that is lost per cycle can be approximated by a constant (something like 2pi, which is to be determined) divided by the Q...

Homework Statement An AC voltmeter connected to the nodes A and B shows the same value as when connected to the nodes A and D (refer to attachment). What is the inductance of the inductor? What value does the voltmeter show? The inductor is ideal. U = 70sin(314t) V, C = 80 μF, R = 500 Ω...

For the molecule HOCOO-, does the oxygen in the OH group participate in resonance? Is that particular contributing structure a major contributor to the hybrid structure? After a bit of discussion with peers, we agree the oxygen has electron-withdrawign effects, but since it is already bonded...

Good afternoon, I am working my way through the Feynman lectures and I am stumped at Chapter 23, Resonance. Specifically, the derivation of equation 23.12. I have followed up to that point but the appearance of tan (theta) baffles me. The equation is below: Any help would be greatly...

Homework Statement in series rlc circuit maximum voltage across inductor occurs at which frequency?Homework Equations The Attempt at a Solution In the series rlc circuit current through the inductor is maximum at the resonance frequency. But I don't know whether at resonance frequency maximum...

Here attached is a question from my exam. My TA removed 1 point out of 7 for a reason. Can anyone decipher for what? There's the writing in red but it is illegible to me. I don't understand to what he refers by 8 and 6 t or +, or whatever he wrote. http://imgur.com/igpyp8V Or can anyone write...

I am doing R&D and have been hit by a problem. I want to find the resonnce frequency to my heating coil without having to hook it up to the rest of my oven. I fall into the problem because I don't have the stray funds to buy a frequency generator. I heard that with capacitors and an oscilloscope...

Please could someone explain to me what is meant by the radially symmetric "breathing resonance" of a sealed water filled tube or cell? That is with the use of transducers this can be achieved, but what does it mean? is it talking about generating a standing wave in the fluid? It relates...

Please look at the pictures. I do not understand why they have not included the resonance structure for that molecule for which all the double bonds are displaced is not included.

Hello all! Homework Statement Consider a cylindrical cavity with length "d" and radius "a". Find the corresponding electric field, and the dispersion relation therein. Homework Equations Maxwell's equations. The Attempt at a Solution I tried to solve the appropriate vector Helmholtz...

Homework Statement Are the following statements true? 1) All contributing resonance structures must have the same net formal charge. 2) All atoms in contributing resonance structures must have complete octets. The Attempt at a Solution The first one strikes me as true. Net formal...