Resonant Definition and 195 Threads

Does anyone know of a formula for determining the various resonant frequencies of 2 coaxial cylinders with radius a and b and height h? Thanks.

Obviously it has to taper from the fixed end to the most mobile one. Or from the centre (node) of a symmetrical one to the ends (antinodes). Talking about longatudinal harmonic resonance only here. Ideally the static instants at full compression or tension would give a constant...

When a wave propagates in a materiel (wave has same frequency as natural frequency of the material) there is attenuation. Is the energy absorbed by the materiel?

I don't understand when you have an AC Circuit that has a coil, capacitor and resistance. What factor will the resonant frequency change when the frequency is tripled?

Hey guys, As a hobby I've decided to pick up EE and I've been reading quite a bit and I'm interested in building some basic circuits and determining the SRF in some coils that I've wound. I have found that you can calculate SRF using this formula: ......(1/5) ...29.85 x (H/D) F =...

[SOLVED] Parallel LCR resonant frequency derivation for larger resistances There have been similar questions here before which I have seen, but I couldn't find an answer with the detail I require. Homework Statement I would like to derive an expression for the resonant frequency of a...

Homework Statement Name the two lowest resonant frequencies of a tuning fork; each tine is 18 cm long. Speed of wave is 420m/s... ignoring metal thickness. Homework Equations F= Velocity/Wavelength; l= wavelength/2, l= wavelength, l= 3/2wavelength, l= 2wavelength, l= 5/2wavelength...

Hello, I have a question on how to do something. I'm not sure whether calculus or trigonometry is needed. this is not a homework question. an object will move left and right of a center point in a sinusoidal motion. the period is always the same; the amplitude should change. at any...

Hello, I have a question about resonance. Say I want to emulate something in software that has a resonant frequency. It will be receiving pushes and pulls at various intervals, and I want the emulation to reflect how intensely it would vibrate at its resonant frequency as the result of those...

Hi I'm currently setting up a simple cantilever beam experiment. The cantilever will be positioned vertical and a spray force will be exerted from the left hand side, causing the plate to deflect. This deflection will be measured and recorded. My question is how do I calculate the...

Here is a nice demonstration of resonance and vibrational modes.

Here's a question my mate asked me to help out with, but I'm a bit stuck, any help would be good. Apologies for not being able to show the circuit (don't know how) so I'll explain it. A parallel circuit has a supply of 1 Vrms and has 2 branches. The first branch has a single capacitor of 2.2...

The imaginary part of the \chi ^3 susceptibility can be split into the resonant and non resonant contributions. The resonant is the contribution from satisfying a resonant vibrational state/mode, but what contributes to the non resonant term?

How does one begin to derive the resonant frequencies of a multiple mass mass-spring system? (3-mass system) OK, so deriving this isn't a homework problem. I'd just like to know how. It's been a couple of years since I've taken a physics course. I was asked what the resonant frequencies of each...

Does the electromagnetic or acoustic resonant frequency of a hallow spherical object ever equal the circumference of that object? If not what are the formulas to calculate this? Thanks in advance.

Homework Statement Purcell 8.4: In the resonant circuit of the figure(I'll reproduce the image below) the dissipative element is a resistor R' connected in parallel, rather than in series, with the LC combination. Work out the equation analogous to Eq 2. (d^2V/dt^2 + (R/L)(dV/dt) + (1/LC)V = 0...

I'm looking for a formula to calculate the resonant frequency of a capped cylinder. I have found a link to a formula but was surprised to see that cylinder radius is not taken into account when making the calculation. It was my understanding that the larger the radius of a cylinder the lower...

Alright, I've been looking around for an opinion on this for awhile: Suppose you have a tube of deuterium whose radius is much much less then the length. You use a high voltage/large current to ionize this Deuterium. In a similar configuration to the Z-Pinch device a magnetic field is...

Homework Statement Find the second resonant length of an air column that resonates with a sound of frequency 1.0 kHz at 15.0 degrees Celsius under each of the following conditions. a) the air column is closed at both ends b) the air column is open at both ends Homework Equations...

When calculating the resonant frequency of a circuit, does it matter whether or not the components in that circuit are in series or in parallel? Say...for a simple circuit with three components in series with a voltage source (a resistor, an inductor and a capacitor for example). The resonant...

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

A string that is stretched between fixed supports separated by 75 cm has resonant frequencies of 420 and 315 Hz, with no resonant intermediate frequencies. What are (a) the lowest resonant frequency and (b) the wave speed? Okay: So I know that since there are no intermediate resonant...

Hi I am new to the forum. I have been studying and recently doing experiments with (LC) series resonant circuits at home. I have been referencing numerous electrical engineering books for information on series resonance, but unfortunately I have been unable to find any books that break the...

Homework Statement In the circuit below, find the resonant frequency (\omega_0) and Z_{IN}\left(\omega_0\right). http://img143.imageshack.us/img143/9845/problem1444dx4.jpg Homework Equations \omega_0\,=\,\frac{1}{\sqrt{LC}} The Attempt at a Solution The resonant frequency is easy to find...

Hello everyone! First post here! I have quite a specific question. I am investigating resonant frequency of biological matter with dimensions of about 1mm cubed. What I would like to know is... 1) does anyone know of any good journals which look into resonant frequencies of small...

Homework Statement resonant freq. in air for arbitrary length steel pipe with radius in the 3-8 cm range and wall thickness in the o.5 to 1 cm range Homework Equations unable to find a relevant equation The Attempt at a Solution

Is there a pattern for resosnant length for closed and open air coloums. Does this apply to instruments.

Homework Statement an organ pipe, open at both ends, esonantes ats its 1st resonant lenth with a frequency of 128hz. what is thelength of the pipe if the speed of sound is 346m/s Homework Equations the open colum patterns The Attempt at a Solution i just can't get it

Homework Statement The 3rd resonant length of a closed air colum is 75cm. determine the 1st and second length. Homework Equations the rensonant patterns The Attempt at a Solution i just don't get this resonant things.

Homework Statement The 1st rensonat length of a closed air column occurs when the length is 30.0cm. what will the send ond and third be? Homework Equations I did the pattern thign like 3/4 but i got the wrong answer. The Attempt at a Solution i multplied the legth 3/4 but i got the...

hi we did a lab with a resonant tube filled with water we're supposed to figure out the relationship between the resonant length and the wavelength. what we did was we filled up the resonant tube with water then put a tuning fork above it and found where that same sound was made. Here is an...

Hello All, I'm wondering if there is some nifty formula out there that will tell me how much wire I will need to wind a loop antenna if I know what the diameter of the loop will be and the frequency that I want to tune into? Thanks, Jason O

Hey guys, I'm doing a lab report on an LC resonant circuit, and it's I've kinda hit a speedbump in trying to explain why exactly the resonance is happening. I don't know if "LC resonant circuit" is a normal thing to call it so i'll explain a bit. You have V_in which goes into a resistor, then...

Hi,:approve: I want to know why if XL = XC in circuit which has only capacitor and inductive. The current will be mixmum not infinity because we know the rule which I=V\Z which z is impedance. so the z will be zore so the current must be infinity.:confused:

What is the formula to calculate the oscillating (resonant?) frequency of a series RC circuit with a constant DC voltage? For example the RC circuit shown at this site: http://www.mikroelektronika.co.yu/english/product/books/PICbook/2_02chapter.htm" How does this circuit resonate...

Hi. I'm having some trouble understanding resonance. I was reading about how ears work on howstuffworks.com, and it noted that the ear picks up different frequencies basically because little hairs inside the ear resonate at different freqencies. It said that this is also the concept behind...

What is resonant circuit? and specifically what is RLC circuit? THANX ALOT!:smile:

I am stumped on how exactly to do this. I have the function: T(s) = 7/s(s^2+6s+58) I need to change this to T(iω) and i being a complex root. This creates: T(iω) = 7/(ωi*(ω^2+6iω+58)) I know I need to plot this function and find out where omega peaks and this will be my resonant...

Recently I was handed a flyer for a new gadget that is being sold. It consists of two modules that are attached with sticky tape to the underside of ones gas tank. 'There are no batteries and no wires' yet the gizmo 'changes the resonant frequency for the gasoline in your tank, improving...

Dear Forum, I am not sure how I can calculate the Q-factor in the circuit attached. (The circuitresonates at 13.56MHz and tuned to 50 ohm input impedance, thus the two capacitors) Is the Q-factor of the circuit simply Q = \frac{\omega L}{R_{a}+R_{coil}} ? I went through some examples...

Consider a resonant LC circuit. It consists of a capacitor of capacitance 100pf and an inductance of 0.1mH. suppose that when the circuit oscillates the max. voltage on the capacitor is 1mV. Energy stored in the capacitor is given as 0.5CV^2. a) Show that in this circuit one can obtain a...

Hi all I read that Q,the quality factor of series resonant circuits is wL/R ------------>1/R sqrt(L/C).This i understand 1.but for parallel resonant it is R/wL...hmm but why is that?this i don quite get. 2.Then what do u mean by loaded resonant circuit and unloaded resonant circuit...

Hello, I have a question on resonant frequencies. Everyone knows the example of breaking a wine glass by singing an extended note at the resonant frequency of that glass. My question is: Can other objects be "broken" by this same process? For example, is it possible to produce the...

i have a cylindrical pipe with a fixed internal diameter and a variable length. how would i calculate the resonant frequency of water within it, given that the speed of sound in water is approx. 1398 m/sec?

I have been trying to figure out the acoustical resonant frequency of objects. I think their are engineering formulas that could be used. For example if you have a 1x1x1inch block square of iron, at what acousticaly resonant frequency would it be tuned to? I imagine the shape would have...