Resonance Definition and 659 Threads

  1. SIMON1

    What is the Equation for Determining the Resonant Frequency of a Drum Shell?

    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...
  2. Kevin Spacey

    Describing how to make a standing wave?

    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...
  3. Domenico94

    Where Can I Find Detailed Information about Nuclear Magnetic Resonance Machines?

    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...
  4. N

    What is the format for ionic lewis structure w/ resonance?

    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...
  5. S

    Resonance Frequency Homework: Find Frequency w/Given Spring & Mass

    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...
  6. AdityaDev

    Resonance in String: Understanding Wave Interference According to Book

    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...
  7. U

    Quark Scattering and Quark Flow Diagrams

    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...
  8. Jewish_Vulcan

    How does resonance of waves work?

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

    Can Resonance Occur at Multiple Frequencies in String Instruments?

    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...
  10. J

    Setting up an LRC series circuit with coupled coils

    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...
  11. K

    When does resonance take place?

    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:
  12. J

    2nd order resonance filter amplitude response(z-parameters)

    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...
  13. Z

    What Does the Quantum Notation S11(1535) Indicate in Baryon Resonances?

    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...
  14. 8008jsmith

    What are the Steps for Solving Organic Chemistry Resonance Homework?

    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.
  15. 2

    Transforming DC to AC: The Role of Inductors and Capacitors in RLC Circuits

    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...
  16. Matt atkinson

    Cyclotron Resonance: Lower Limit for Electron Scattering Time

    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...
  17. K

    Engineering Resonance in a circuit with L and C

    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...
  18. M

    How to Test Amplitude-Phase Response of Sensors and Circuits using Arduino DUE?

    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/...
  19. Y

    What really are resonance structures?

    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?
  20. D

    Does Resonating an Inductor at Its Physical Frequency Improve Efficiency?

    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...
  21. Z

    Finding Practical Resonance (Need help with my setup)

    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...
  22. K

    Will an unbalanced wave be able to induce resonance?

    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...
  23. V

    Resonance in electron impact on atoms

    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 ?
  24. O

    Standing Waves and Resonance in Fixed-End Transverse String Vibration

    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...
  25. Rugile

    Average power in series LC circuit

    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...
  26. J

    Induction Heater - HalfBridge Series Resonance Circuit

    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...
  27. E

    Speed of Sound in Air & Resonance in a Pipe

    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...
  28. S

    Do Oscillations Occur in Inductors When Modifying AM Transmitter Circuits?

    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...
  29. SalfordPhysics

    Helmholtz Resonator using voltmeter

    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.
  30. M

    Determining the velocity of sound in the air by the resonance method

    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...
  31. H

    How do electrons induce resonance in a cavity resonator?

    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?
  32. R

    Classical Mechanics: Lightly Damped Oscillator Driven Near Resonance

    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...
  33. Rugile

    AC circuit - voltage drop and resonance

    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...
  34. M

    The Oxygen in HOCOO-: Does it Participate in Resonance?

    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...
  35. rpthomps

    Resonance - from Feynman lectures

    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...
  36. A

    Maximum Voltage Across Inductor in Series RLC Circuit Occurs at Which Frequency?

    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...
  37. A

    Chemistry Resonance Structures for a Certain Molecule

    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...
  38. C

    Resonance frequency of heating coil

    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...
  39. R

    Radially symmetric "Breathing" resonance of a sealed water filled tube

    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...
  40. A

    Chemistry Resonance Structures for a Certain Molecule

    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.
  41. D

    Cylindrical resonance cavity problem

    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...
  42. Q

    Are these statements about resonance true?

    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...
  43. Q

    Resonance structures for nitric oxide

    Homework Statement Is N triple bond O with a radical on oxygen a valid LS for the nitric oxide molecule? Homework Equations Max number of valence electrons in a shell - 2n2. Oxygen is in second row of periodic table. Max valence electrons: 2(2)2 = 8. The Attempt at a Solution I...
  44. gfd43tg

    Engineering Finding values of RLC circuit given resonance frequency

    Homework Statement A series RLC circuit is driven by an ac source with a phasor voltage Vs = 10∠30◦ V. If the circuit resonates at 103 rad/s and the average power absorbed by the resistor at resonance is 2.5 W, determine the values of R, L, and C, given that Q = 5. Homework Equations...
  45. A

    Resonance in a Mechanical System

    Homework Statement A mass m is attached to one end of a massless spring with a force constant k and an unstretched length l0. The other end of the spring is free to turn about a nail driven into a frictionless, horizontal surface. The mass is made to revolve in a circle with an angular...
  46. U

    Water Column Resonance Time Interval Calculation

    Homework Statement There is a cylindrical vessel of cross-sectional area 20cm^2 and length 1m is initially filled with water to a certain height as shown. There is a very small pinhole of cross-sectional area 0.01cm^2 at the bottom of the cylinder which is initially plugged with a pin cork...
  47. J

    Forced oscillations: solution of Differential Equation at resonance

    Homework Statement Following a worked example in my book, I have been trying to get a solution for the equation \frac{d^2u}{dt^2} + \frac{k}{m}u = Fcos\omega t The book says that at resonance, i.e. when \omega_0 (the natural frequency) = \omega (the forcing frequency), the term F cos\omega...
  48. T

    What is the difference between resonance in a vacuum and resonance in a medium?

    So we're studying resonance. It says that it occurs when an external periodic force acting on a body is exactly equal to the natural frequency of the body. The body then begins to vibrate with greater/increasing amplitude and intensity. And so what I want to know is that is there a...
  49. P

    How Does Resonance Occur?

    Resonance -- How does it occur? I am having a little difficulty with the concept of resonance. Could someone explain how resonance occurs and how elastic oscillation relates to resonance?
  50. T

    What is Resonance? Simple Definition

    I know what damping is but I have no idea what resonance is? Please explain it in simple words.
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