Resonance Definition and 630 Threads

A tuning fork oscillates with simple harmonic motion described the equation: x = 0.00150cos(2770t) (where t is seconds) a) calculate the frequency in Hz of the tuning fork b) Suggest why only this tuning fork (taken from a set of 10 forks) gets louder when held above a glass bottle full...

Set-up Closed tube with a hole at each end. Microphone at one end attached to computer. Clap noise made at the other end which will produce a range of frequencies. The computer program detects the resonant frequencies and their amplitudes. The graph produced seems to show the lower resonant...

In theory that means the effect of resonance in a system with mechanical vibration?

[FONT="Arial Black"]Beats and Resonance In the Beat not have friction force, correct ? m \frac{d^2x}{dt^2} + kx = F_o cos(wt) We can write as \frac{d^2x}{dt^2} + w_o^2 x = \frac{F_o}{m} cos(wt) If w \not= w_o Assuming (Particular solution) x_p = acos(wt) + bsin(wt) Why we...

Homework Statement A truck is traveling 70.0 kph away from you. The Driver is blowing a horn with a frequency of 400 Hz, air temperature is 25 degrees celcius.:rolleyes: Homework Equations doppler effect The Attempt at a Solution none

I don't find my notes right now, I'll try to use my memory on this. According to my notes, the impedance of an RLC series circuit is given by \frac{1}{\sqrt{R^2+\left ( \omega L-\frac{1}{\omega C}\right )^2 }}. So when in resonance, Z=\frac{1}{R} instead of Z=R. Also if I recall well, for...

Homework Statement The water level in a vertical glass tube (length 1 m) can be adjusted to any position in the tube. A tunning fork vibrating at 660 Hz is held just over the open end of the tube. calculate at what position of the water level will there be resonance (standing waves) in the...

Homework Statement The problem is to design a cantilever beam with a certain resonant frequency. Homework Equations w = sqrt (k/m) The Attempt at a Solution I know k for a beam and m can be written as density * volume. My question deals with the w. If I am given a...

Homework Statement A resonant current of 50mA flows in a circuit consisting of a 2mH inductor, 20 ohm resistor and 0.3nF capacitor all in series. What is the applied voltage? If the current is reduced to 30mA by changing the frequency but not the voltage, find the new frequency and the phase...

Homework Statement Ok, this is not homework, just something that's been bugging me and my tutor is unavailable(as usual) to help me. Why does increasing the mass of a system lower its natural frequency, like adding a concrete block to a washing machine. Come to think of it, I'm not even too...

The resonating frequency of a series LC circuit is given by: f=(c/2πn)[(dD/Aa)^1/2] This frequency measured in a moving frame is same and hence c is concluded to be constant but the distances and areas may change due to length contaction and the values of inductance and capacitance should not...

I was asked to draw the resonance structure of nitrous oxide and given some bond length. So i need to eliminate non-probable resonance structure for nitrous oxide. I was able to draw three structure but how do we use the bond length to liminate non-probable resonance structure for nitrous oxide?

Homework Statement Is there a resonance in H2CO3 ? Why ? and Why not ? Homework Equations The Attempt at a Solution

I was just wondering if would be possible to tune into this frequency? Has anyone ever attempted it?

What exactly is a resonance frequency? I just want to understand what it is, I can solve for it but it's no use if I have no idea what it is.

For a vibrations lab experiment, our group decided to determine the resonance of 3 wines glasses, conical, cylindrical, spherical. I know that on Wikipedia they have these equations. What they don't have is how they derived them. I would like to know the math behind these. I've tried searching...

I have just started to study resonance and I don't quite understand what it is. My textbook says: "All objects vibrate with a characteristic "natural frequency". When an object is forced to vibrate at its natural frequency, the amplitude of its vibration can grow very large. This effect is...

Homework Statement You have an inductor that you are planning to use in series with a variable capacitor C in the tuning section of a radio. Neglect the internal resistance of the inductor. (a) If you have a fixed inductance L = 3.4 mH, find the maximum and minimum capacitances the variable...

I am trying to understand the theory behind nuclear magnetic resonance. I have been reading various explanations (some more detailed than others) but I still have several holes in my understanding and I hope that some of you can help clear them up. I realize there are quite a lot of...

Dont have to be mean?

When a forced oscillation is damped, it is true that the frequency at which resonance occurs decreases right? so does this mean that the natural frequency has decreased too or does it only mean that resonance does not occur at natural frequency when being damped?

Homework Statement The amplitude of a driven harmonic oscillator reaches a value of 25.0Fo /m at a resonant frequency of 380 Hz. What is Q?Homework Equations Q=m(wo)/b Q=wo/(\Deltaw) w=2\pif wo= (k/m)^1/2 w'=(w0^2-y^2)^.5 y=b/2m The Attempt at a Solution Honestly, I don't know where...

I'm having problems filtering out certain frequencies from others with a series LC filter. I have a 1.923 Henry DC filter choke inductor set in series with a 0.1 micro Farad capacitor. I send the signal through the inductor to the capacitor and output from the other side of the capacitor. I'm...

Homework Statement I am just confused on what is residues and resonance in a differential equation problem? Can anyone give me resources on the web where I can study this? Homework Equations The Attempt at a Solution

can someone help me with this question? Draw the most important resonance contributor of the following structure? if its to small http://img196.imageshack.us/img196/8417/48084902.jpg

Can someone please explain to me how resonance can be induced into the electrons of an atom using pulsed electrical fields? Can this also be done using photons of a specific wavelength?

Hello friends Q1. Is that Resonance only happened in series circuit not in parallel, which are consisting in R L C components? Q2. what Is Q-Factor and is that Related with Resonance. Please Must Explane this questions :redface: thanks A lot

What is resonance when it comes to molecular structure? I understand that the concept of resonance arises when there is more than on possible lewis structure. However, everything I read says the atoms don't oscillate between structures and that in fact, they assume a constant shape. My...

Homework Statement The sine wave sin(t) will only drive the harmonic oscillator y'' + \omega ^2 y into resonance when \omega = 1 . For what values of \omega will the half- and full-wave rectified sine waves drive the harmonic oscillator into resonance. Homework Equations The...

"At resonance frequency, the circuit impedance is maximum. It is resistive and its value is given L/Cr..." The book doesn't explain how impedance equals L/Cr, so I'm confused here. How is it derived?

"At resonance frequency, the circuit impedance is maximum. It is resistive and its value is given L/Cr..." The book doesn't explain how impedance equals L/Cr, so I'm confused here. How is it derived? (Can you please show all the steps?) Thanking in advance...

Hi all: One system consists of two neutrons. both spin magnetic moments are 1/2. At a instant time, neutron 1 locates position 1 and neutron 2 is in position. As we know, spin magnetic moment is kind of dipole moment. They can generate magnetic field (not electric field). The interaction can be...

Hi all: I have one confused concept about T1 relaxation time in nuclear magnetic resonance field. As we know, fluctuation of local magnetic field inside the sample causes T1 decay in the following RF excitation. Imagine one simple mode, near a gadolinium ion (Gd3+), there is one water...

the solution for current I, for series LCR circuit is I = (E/Z)sin(wt+\phi) Where Z = \sqrt{R^2 + (X_{L}-X_{C})^{2}} So for Resonance (i.e. maximum Current Amplitude) of LCR Circuit the necessary condition seems to be X_{L}=X_{C} Which gives \omega=1/\sqrt{LC} But some text-books and wikipaedia...

Homework Statement a) WRUF broadcasts at 103.7 MHz, what is the wavelength associated? b) If you were to use an RLC circuit to tune to this radio station, what resonance frequency would you tune to? Homework Equations f(resonance)= 1/(2\pi\sqrt{LC}) The Attempt at a Solution a)...

Is this valid: http://img197.imageshack.us/i/imagecct.jpg/

When carrying out a system analysis During design stage (Variable speed drives connected to 3 transformers in parallel) is it a normal practise to check/measure neutral - Earth harmonics, can this be predicted?

Hello All, I have been doing a few basic experiments with coils lately and I am trying to figure out the simplest way to drive a coil at its natural resonant frequency so that I can get the Q as high as possible. My only problem is that I don't have a sine wave generator that I can use. I...

Hi, i am currently working on a problem involving a one dimensional, vertical two mass two spring system where the upper mass is free to move with the lower mass adn the lowermass is excited using an oscillating force. The springs are different with a damping force in the form of D = C*x'...

Homework Statement We shattered a wineglass using resonance. We also filmed the radius distortions here: http://www.youtube.com/watch?v=HpcXf906wPw&feature=channel_page We also filmed it shattering here: http://www.youtube.com/watch?v=45agipT91Vw&feature=channel How do we measure how...

Is the resonance frequency of a magnetron cavity purely a function of its geometry? Thanks!

Homework Statement An open vertical tube is filled with water and a tuning fork vibrates over its mouth. As the water level is lowered in th etube, resonance is heard when the water level has dropped 17 cm, and again after 49 cm of distance exists from the water to the top of the tube. What is...

A constant voltage at a frequency of 1MHz is maintained across a circut consisting of the inductor in series with a variable capacitor. When the capacitor is set to 300pF the current has its max value. When the capacitor is reduced to 284pF the current is 0.707 of its ma value. Find The...

Explain the meaning of the term resonance as applied to a series A.C circut. What is the best way of answering this question. I am kind of confused on what to include in the definition and what not to include. We know that the capacitive reactance and the inductive reactance depend...

Drawing graphs with errors using Matlab. I'm writing my first serious report, yay!, from the measurements we made with series RLC -circuit. I'm supposed to determine the values of the two coils we used as well as their self-inductanses. We had four different circuits: R, L1 and C in series...

Homework Statement For a sinusoidally driven RLC circuit. Draw accurate resonance curves for C = 0.01uF, L = 0.01mH and i) R = 20 ohm ii) R = 200 ohm 2. The attempt at a solution Believe it or not, I do not have a single example of resonance curves in any of my textbooks...

Could you recommend me some good links/articles/bookz on subj and its applications?

Hey guys, Homework Statement I am conducting an investigation in which we will be playing around with the resonance of different wine glasses. I would like to know what characteristics of wine glasses cause the resonate frequency to change. Preferably not a direct answer but more a hint...

Homework Statement This isn't exactly a homework question, but my lab partner and I came across a phenomena whilst doing an electron spin resonance experiment, and I was wondering if anyone could help explain it. The sample we found electron spin resonance for is...

I'm trying understand surface plasmon resonance in a gold film, and have decided that gold must have a refractive index of say 5-10ish in optical light. However I'm not sure and I think I might be on the wrong track. Also does negative refractive index have anything to do with surface plasmon...