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.

607 questions
Filter by
Sorted by
Tagged with
237 views

Higher and lower frequencies than resonance frequency in an RLC circuit [closed]

I read in my high-school book that in a RLC circuit for frequencies lower than $f_{res}$, $X_C>X_L$ and for higher frequencies $X_L>X_C$, where $X_C$ is the resistance of a capacitor and $X_L$ ...
25 views

Pressure dependency of the end node correction in a double-ended resonator

I have an acoustic resonator which is tube-shaped and open on both sides. The open ends of the tube open into a buffer volume. In the picture below I visualized my assumption. Measuring the resonance ...
86 views

Why do standing waves filter out all other frequencies but its natural frequencies

I was wondering about how standing waves filter out all other frequencies. I read online that it's because the other frequencies destructively interfere with one another. However as hard as I try, I ...
237 views

Schumann resonance frequency

I keep hearing that Schumann resonances have been increasing rapidly in recent years. And that it was relatively stable before. I failed to find any scientific data proving or disproving this. I would ...
30 views

How loud really are ultrasound transducers?

There are a plethora of mini ultrasound transducers available. Many of which have a Sound Level SPL > 110dB. This seems extremely "loud". If you were to listen to one of these transducers, would they ...
57 views

Does resonance by sound waves, or by any other similar means, occur at the molecular level?

When the frequency of sound waves match the resonant frequency of a structure, like a building or a window, resonance occurs which is clearly visible. This frequency depends upon the material and it's ...
36 views

Quality factor of earth's rotation around sun

I am taking a course on the resonance phenomena, and the professor was mentioning something like, the earth's rotation around the sun has a quality factor of $10^7$. Does it mean, after $10^7$ years, ...
58 views

How does the resonant frequency of a glass slab depend on its thickness

I am interested in finding out how does the thickness of a glass slab change the resonant frequency of it. Since i know that resonant frequency not only depends on the material but also on the ...
64 views

Predict the behaviour of this system involving magnets oscillating on springs through connected coils

I came across an interesting problem recently and started to think about the situation in more detail. Here is the setup: Identical bar magnets are suspended from identical springs, with the North ...
115 views

Question regarding open and closed air columns

I'm studying high school physics and I've encountered this question: An air column that is open at both ends has a distance of 24.0 cm from one resonant length to another. What is the wavelength ...
57 views

Why does “AT cut” of Quartz provide pure shear thickness oscillation?

According to this page https://www.nanoscience.com/techniques/quartz-crystal-microbalance/, “AT cut” provides pure thickness shear mode oscillation where the two surfaces of the crystal move in ...
304 views

Has anyone tried to find the wavelength to the Corona virus cell? [closed]

I have seen websites and videos that show how cancer cells can be destroyed using sound resonance oscillation. So has anyone heard of anyone who is in the field of sound resonance trying to capture ...
350 views

Cantilever Beam Deflection with load in middle of beam

How can I calculate the deflection of a Cantilever beam if there is a load at different points on the beam? My current scenario is the following → I have a ruler that I have modelled to be cantilever ...
24 views

Cantilever beam with a mass at different positions and resonance frequency [duplicate]

I have a Cantilever beam attached to vibration generator at the bottom. I have a piece of blu tac of some mass and I move it down the ruler. Whilst moving it down I notice the resonance frequency of ...
17 views

Pendulum Mass Dampers and Buildings

So if a driving force is applied to a building containing a mass damper, what will happen under the following circumstance If the mass dampers frequency is not equal to the resonance frequency of the ...
93 views

508 views

Resonant frequencies in organ pipes

I have a series of doubts regarding the principle of organ pipes. For a given length of closed organ pipe there are various modes of vibration for the standing waves.I dont know if this is silly but ...
97 views

Power in series LCR circuit [closed]

In a series LCR circuit R=200 ohm and the voltage and the frequency of the main supply is 220 V and 50 Hz respectively. On taking out the capacitance from the circuit the current lags behind the ...
185 views

How does the tuned mass damper on Taipei 101 work?

I'm interested in how the tuned mass damper on the top floors of Taipei 101 works, particularly how do engineers ensure that it dampens oscillation rather than making it worse. The damper can be ...
71 views

Current in a resonant circuit using complex impedance

I tried to obtain the current $I(t)$ of the shown resonant circuit using complex impedance. The inductor and capacitor have impedances $i\omega L$ and $\frac{1}{i\omega C}$ respectively. Using ...
148 views

Resonating glasses

When we collide two glasses they produce sound like not from one collision but from multiple. And frequency changes over time. Is this because they resonate with each other? But how this resonase ...
151 views

When using $\Delta \omega/\omega _{0}$ as a measure of how sharp a resonance is, why divide by $\omega_0$?

In A.P. French's Vibrations and Waves, page $111$, the author said the following about the sharpness of a given resonance, We can say that the resonance is narrow if the width is only a small ...
74 views

How do the vortices in vortex-induced vibrations (VIV) form?

I am currently doing a research project on the topic of the Vortex Bladeless technology in a technical college course. I have been researching VIV and the intuition behind this, but I am still ...
43 views

Can physical spaces 'resist' certain sound frequencies?

I whistle a lot, and I'm fairly decent at it. Recently I was walking up the stairs in a house while whistling. As I whistled, I found it difficult to hit a specific note in the song that I would ...
437 views

Help in understanding frequency vs phase difference graph

The following graph in my textbook plots the relationship of external driving frequency and phase difference of the driver and a system. From this question (Why dosn't amplitude increase when ...
122 views

Why coupled oscillators tend to seek integer frequency ratios?

In this document, the author writes (page 225) Coupled oscillators have a tendency to seek frequency ratios which can be expressed as rational numbers with small numerators and denominators. For ...
58 views

What happens if one end of a string is vibrated at a frequency not equal to the harmonic modes?

Let's say we have a string of length $L$ with wave propagation speed $c$. The right end $(x=0)$ is fixed to be at zero amplitude and the left end $(X=-L)$ is vibrated at some angular frequency $\omega$...
84 views

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 ...
9k views

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 ...