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# Questions tagged [resonance]

Resonance is a characteristic of physical systems having a structure that allows energy to flow between various states at a specific, oscillatory rate (resonant frequency). For a stable resonant system at steady state the internal energy is either fixed without losses or the rate of energy input is equal to the energy losses.

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### What are part of body receiving such these frequencies so they are claimed can heal? [closed]

Here are what are claimed frequency can be used to heal our (certain part of) body. In my opinion, they work if the "transmitting" frequencies are meet with the receiving frequency in our body. I have ...
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### Why is Microwaved mac & cheese burnt where they touch?

After reheating cold about 1.5 oz. of Annie's Mac & Cheese shells for 15 seconds on high power in the microwave, the mac & cheese was burnt black only at certain points where the pasta is ...
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### Standing Wave in a transmission line and Resonance

let's consider a transmission line of length L closed on a mismatched load. So, there will be a travelling wave and a reverse travelling wave: V(z) = V+(z) + V-(z) My question is: will there always ...
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### Derivation of driven force on a string. How to prove maximum amplitud is achieved at resonant frequency?

I know if I have a driven oscillator of natural frequency $\omega$, applying a driven force $F_0 \cos (\Omega t)$ will result in a motion equation like this one (steady state/particular solution): \...
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### Calculating the resonant frequency of a metal pin

Is there a way to calculate the required diameter of a cylindrical metal (let's say aluminum) pin of a fixed length so that it has a specific resonant frequency? Let's say I have an aluminum pin that ...
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### Does resonance just depends upon the frequency of the external periodic force and the natural frequency of an object?

I am a little confused about the phenomenon of resonance, I read that it occurs when the frequency of an external force matches the natural frequency of an object. So, it was given that soldiers ...
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### Electron spin resonance experiments

Recommend me some good books on ESR. I'm performing an experiment of calculating lande's factor using ESR and I've so many doubts. Please help!
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### Electron spin resonance

What is the principle of electron spin resonance? I'm performing an experiment in which I've a DPPH(paramagnetic) sample and I'm trying to find out the lande's factor using ESR setup. My problem is I'...
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### Closed end tube with anti-node

The experiment was about creating a sound wave inside a close ended resonance tube and finding the locations of maximum and minimum amplitude. (after adjusting the tube length that makes a standing ...
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### Resonance frequency and impedance of a piezoelectric element

I am reading about piezoelectric elements, and I have some questions in that regard. I have come across a graph showing the impedance as a function of frequency. Some spikes occurs on the graph at ...
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### How to determine resonance frequency of a piezoceramic element?

Lets say we have a circular piezoelectric element with radius R and height H. We assume that the piezoelectric element has density $\rho$. How do you find the resonance frequency ? Is there a formula ...
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### Difference between resonance and the synchronization of coupled oscillator

I was reading about phase synchronization of coupled oscillator where the oscillators are synchronized by an applied field. Now the coupled oscillators are synchronized. So my question is that what is ...
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### Resonance in physics

The resonance is a physical phenomenon which manifests itself in several contexts. It is asked the general characteristics and a specific example in order to illustrate how the typical parameters of ...
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### How are standing wave patterns created in tubes?

I get how standing wave patterns are created in strings: At a certain resonance/natural frequency of the string, a standing wave is created, increasing the amplitude of the sound, and standing waves ...
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### Ocean Frequencies

I'm a musician studying at uni. For an assessment I'm taking an idea for instrumental tuning which relies on a combination of Pythagorean tuning and Schumann resonances. Whilst Schumann resonance I ...
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### How to find the resonant frequency of any column of air?

So for a research project I need to predict what the resonant frequency of a air column in a vessel will be . The problem is that these vessels are not cylindrical or any common shape. So I need to be ...
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### Fiber ring resonators versus microresonators

Fiber ring resonators made of multimode fiber are capable of supporting multiple spatial modes. Even fiber ring resonators made of single mode fiber can, under favorable conditions, support a few ...
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### Harmonic Oscillator (2DOF) - Do these results seem correct?

I solved a 2DOF system for a buried harmonic oscillator with a forcing function, but I'm not sure what I should be seeing in terms of resonant frequency shift & velocity. The resonant frequency of ...
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### Why choosing for prime numbers eliminates vibration?

I have read that the spokes of a car wheel are usually five because, besides other substantial reasons, five being a prime number helps to reduce vibrations. The same also happens with the numbers of ...
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### What does a negative end correction mean?

I was asked this question in one of my tests: "In an experiment to measure speed of sound by a resonating column a tuning fork of frequency 500 Hz is used. The length of air in the column is varied ...
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### Does putting a part under stress change its natural frequency?

It is easy to imagine how tension changes the natural frequency of a wire. Intuitively it happens with a guitar string when you bend the neck. However, does putting a beam under stress (internal or ...
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### Electromagnet produces sound from hollow pipe

I have wrapped around a 80cm metal pipe some copper wire and attempted to produce an electromagnet. The electromagnet works nonetheless from the extremities of the metal pipe a sound is being produced ...
608 views

### Longest ringing/resonating object [closed]

I am interested in objects which resonate or ring for as long as possible. In particular, I am interested in Crotales (https://en.wikipedia.org/wiki/Crotales), and if it is possible to make a longer ...
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### Why are higher frequencies amplified less by filling a bottle with warmer water instead of colder water?

Out of curiosity I was trying to figure out what makes the sound of hot water versus cold water filling a bottle different, but I'm unable to find any explanation as to why such differences occur. ...
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### What is the reason behind resonance?

At the technical highschool that I attend, the instructor said that the cause of resonance is that energies increase differently. Kinetic energy increases quadratically and potential linearly, so the ...
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I am a High school student who's writing a research paper about Faraday waves and Chladni plates. I've been doing a lot of research on Faraday waves specifically, as there aren't many sources that can ...
I want to calculate the resonant frequencies of a closed cylinder covered with rigid walls. The cylinder is of dimensions: diameter = $1m$, length = $1m$. Would this fundamental mode formula be ...