Resonance Definition and 630 Threads

Question: Is a hybrid structure and a superposition the same thing? (I'm interested in the case of benzene) Read many sources but they were contradictory.. Please help! Thanks!

Homework Statement Hi :) This question is from a test i had today. For some stupid reason we get to finish it off tomorrow. I figured i do what everyone else will, and sort out the what i didn't understand. Luckily this was it. Anyway, the question is typed from memory so it may seem a bit odd...

I am looking at forced vibrations and I have come across this: (w_max)^2 = (w_0)^2 - (1/2)y^2 Now I am not entirely sure of what the (w_max) is. ANd where does this equation come from? It was simply stated without a derivation. THanks guys!:biggrin:

Like the cyanate ion (NCO-), the fulminate ion (CNO-) has three resonance structures. Which is the most important contributor to the resonance hybrid? Suggest a reason fro the instability of fulminate.

Homework Statement Quick one guys, I am very confused about the impedance of a RLC circuit. Say when you have more than one resistor or more than one capacitor or inductor in different combination, you get a impedance with two parts(imaginary which is the reactive part and the resistive...

I can give the following description to the problem, but I don't specifically know what should be done to drive an actuator (specially a piezoeelctric one) in its resonance frequency using a feedback. **The sensor consists of a piezoelectric transducer and a vibration pickup. When an...

Hello! I chose an aspect of a dynamical system exhibiting resonance to model. The focus of the project is on the resonant response of the system. If the wind has a frequency that matches the natural frequency of a turbine, then the turbine will resonate due to wind. I am working on modelling...

I am trying to understand the analogy between a particle resonance and the resonance in a driven, damped classical oscillator. I guess I should first ask for a clear definition of a particle resonance - is this just an excited state which decays quickly? I understand that the KG equation...

Hi all, Sorry for any mistakes but this is my first time I write a post in English. I would like someone to explain me exactly what is the resonance frequency in a piezo-electric actuator. Also give me any link for more information. Does the frequency of the controller play any role...

Homework Statement Hi all. I have shown that standing waves occur on a string of length L (fastened at x=0 and x=L) for angular frequencies: \omega_n=n\frac{v\pi}{L}. Are these frequencies the same as the strings resonance frequencies? Thanks in advance. Regards, Niles.

(a)Find the frequency at which a 33 uF capacitor has the same reactance as a 33 mH inductor. (b) What is the resonance frequency of an LC circuit made with this inductor and capacitor. Well I believe the equation I use is 1 / (2 Pie \sqrt{}LC) but when I use it I come out with a answer very...

Nuclear magnetic resonance! Hello all,i was studying about nuclear magnetic resonance,what i came to know is the study of nucleus in presence of magnetic field and then considering the possible states. But sir/madam what i don't understand here is using the word "RESONANCE". What it signifies...

I'm reconsidering the problem of resonance states. We know that the resonances in QM are described as the complex energy poles in the scattering amplitude. In the version of QFT, the resonances are described by the complex mass poles of the scattering matrix. In QFT, I can understand that...

Hello :) We did a lab in class and the lab was about resonance of air columns. We used a tube and filled it with water. Then we held a tuning fork above the tube to see at which points the resonance occurs. If a vibrating fork is held over the open end of the column, the loudness of the sound...

1. I need to be able to draw K C2H3O2 and any resonance structures. SO far I have drawn four and I can think of at least four more to draw... does anyone know if there are more than four and if so, could you please submit a pdf of the resonance structures?

I want to know more about the cross sections in reaction neutron + targets which neutron has energy in the resonance of target. Help me!

resonance in closed air column Homework Statement we have conduct a lab to determine the speed of sound and estimate room temprature by using open air column method. put a tube in the water, have a tuning folks (sound source) on the above, and pull the tube up and down to find the resonance...

So this morning, while prepping for my calc 2 final, I sat at the breakfast table and drank my coffee. After stirring in some sugar, I tapped the spoon on the side of the mug to shake off the remaining drops of coffee. I noticed the pitch of resonating spoon was increasing. I wondered about a...

Homework Statement A long tube contains air at a pressure of 1.00 atm and a temperature of 77.0 degrees celsius. The tube is open at one end and closed at the other by a movable piston. A tuning fork near the open end is vibrating with a frequency of 500 Hz. Resonance is produced when the...

how does one perform a frequency sweep to obtain resonant frequency? for instance, if the inductance is 50mH and the capacitance is 20nF, how do I achieve a resonant frequency of 200khz? what parameters are involved?

Homework Statement Nuclear magnetic resonance in water is due to the protons of hydrogen. Find the field necessary to produce NMR (nuclear magnetic resonance) at 60 MHz. Homework Equations These are the equations I think I'm supposed to use: omega (subscript zero) = gamma * B...

At resonnance, the phase angle in an a.c circuit is ?pls need an answer. 2. the magnetic force on a charged particle moving with velocity v is ? 3. The current through a resistor in a.c circuit is given as 2 sin wt. Determine the d.c equivalent of the current? 4. What is the angle of dip at...

I know it has something to do with the natural vibrational states of atomic bonds (but does it also come from other sources?). But where do those natural vibrational states come from? Why do they tend to arise? And what exactly is the physical process through which resonance amplifies...

Homework Statement A 5 Micro-F Capacitor, a 65mH Inductor, and a 10 Ohm resistor are connected in series Find the resonant frequency of this circuit. Determine the peak current at resonance, if the peak voltage is 100V Homework Equations Fr = (1/2Pi) Square Root(1/LC) I don't know...

Hi all; So the problem goes as follows: [FONT=&quot]For the circuit in the figure, what should be the capacitance C to put the circuit into resonance? What is then the RMS value of the current? What is, then, the peak value of the air-gap flux density? [FONT=&quot]Is, then, the assumption...

This may sound like a strange question... I was walking away from my physics class today and I wondered if resonant vibrations were the reason my shoelaces become untied. I noticed that when I walk faster, and produce what I believe are more forced oscillations, they become untied more...

"If two flutists play ther instuments together at the same intensity, is the sound twice as loud as that of either flutist playing alone at the intensity? Why or why not?" I know that the answer has something to do with the sensation of loudness being logarithmic in the human ear, but I...

Homework Statement When you sing, the vocal folds in your throat act as a resonating cavity (one open end, one closed end) which allows only certain frequencies. Suppose you try to sing a pure tone which is detected by a microphone and measured to have a frequency 500.0 Hz. This is the...

Is there any typical frequencies range which mechanical systems resonant at ?

Q: If a bridge has a natural frequency of 16 Hz and assuming that a battalion of soldiers marches across it, will mechanical resonance occur? Personally, I was quite unclear about the physical implication of "16 Hz". In my interpretation, I feel that to cause a mechanical resonance on the...

Why is it that in a room, if you're close to any of the walls the lower frequencies of a sound become louder? Ofcourse, there's an interference pattern in the room. You can hear this by walking around and you'll notice that at some points the bass is weaker and at some points it's stronger (the...

Homework Statement Are these two structures resonance? if not why not? Homework Equations The Attempt at a Solution I drew these resonance forms myself, but the answer book didnt' have this resonance structure in its answer and i wanted to know if this indeed is a...

[SOLVED] Resonance Structures 1. Homework Statement [/b] Draw the major resonance contributors that show electron delocaliztion of the formal charge for the following ions, The conjugate base of .O .||... NH2 /..\ /...\\ / ...||...| ... \...//\ ....OH 3. The Attempt at a...

[SOLVED] Resonance Structure #3 Homework Statement Can't seem to figure this one out either...I think the program may have the charges messed up...usually if i post the same exact problem as the answer, it tells me that the answer is the same as the original problem...but with this...

[SOLVED] Organic Chem - Resonance Structures #2 Homework Statement Trying to figure out this resonance structure...Draw the lowest energy alternative.. http://img162.imageshack.us/my.php?image=553562cu7.jpg The Attempt at a Solution ive been trying to move the upper double bond...

[SOLVED] Resonance Structure Draw the lowest energy alternative http://img87.imageshack.us/my.php?image=82956480uh8.jpg I can't figure out what I am doing wrong, but I've tried everything..any help?

[SOLVED] Resonance (Differential Equations Class) Homework Statement A front-loading washing machine is mounted on a thick rubber pad that acts like a spring; the weight W = mg (with g = 9.8 m/s^2) of the machine depresses the pad exactly 0.38 cm. When its rotor spins at \omega radians per...

Homework Statement The question I'm working on is First the diagram:http://http://i215.photobucket.com/albums/cc10/Spookie71/image0-12.jpg There is the matter of the equation I use to solve the equation: Can you please explain for me? Scott

Homework Statement http://i215.photobucket.com/albums/cc10/Spookie71/image0-11.jpg

Homework Statement What is the wavelength of the lowest note that can resonate within an air column 42 cm in length and closed at both ends. Homework Equations Given: l = 42 cm n = 1 Required: \lambda Analysis: l = \frac{n\lambda}{2} therefore \lambda = \frac{2l}{n}...

Is there a theoretical limit to the lowest note achievable in a closed tube(Pop bottle)? Heres the question in context: I've got what I believe to be the correct: http://img141.imageshack.us/img141/9301/1azw1.jpg ^^ May want to check that, if you don't mind ^^

Using MSC Nastran 103 to calculate BIW (car's sheet metal platform only)resonance frequency by FE method, do we need to apply any constrains? I think, a free modal analysis means no constrains, however, final outcome (Hz)will depends on where forces are applied to the model ? Cross car...

Hi, I'm having trouble figuring out which of the following molecules can be described using three charge-minimized resonance structures. Does anyone have any idea which molecules this would include? a. SF4 b. SO3 c. SO32- d. HSO4- e. SO2+

Most of us have seen the experiment where a tuning fork that is resonating, makes another tuning fork resonant when brought close in proximity. Theres another one where small metal rods are mounted upright with plastic knobs on top (dont know if this is necessary), and two rods of same...

The other day, I was in a bathroom stall doing my business, and I randomly started humming some song (can't remember exactly what it was). Well it just so happened that I hit the resonant frequency of that stall. Talk about a surprise! I could make a very quite sound with my mouth closed, and...

Homework Statement A circuit is said to be in resonance if it's complex impedance Z (in terms of R, L, and C (being the resistance, inductance, and capacitance)) is real. We are to determine the resonance angular frequency \omega in terms of R, L, and C. Homework Equations The circuit is...

What is the difference between resonance and quasistable particles ?

I have a 555 out put connected to a coil and i get the frequency i need. But now i need the 555 to power more coils. How should i connect the coils to keep the same frequency. In parallel or Series? The 555 will not directly power the coils. It will switch a Mosfet and that will provide the...

I remember the discussion of resonance from physics class a long time ago because of the illustration of the collapse of the Tacoma Narrows Bridge which was presented as a result of resonance resulting in part from the fact that the bridge's two suspended spans were the same length...

Homework Statement A sinusoidal input is applied to the circuit below. Sketch the waveforms of each of Vr (voltage of resistor), Vc (capacitor) and Vl (inductor) on the one graph with particular attension to the phases (the amplitudes are not important) Hint: Vc is proportional to the...