# Questions tagged [oscillators]

A mechanical or electronic system or device that works on the principles of oscillation, that is a periodic fluctuation between two things based on changes in energy. These range from abstract models such as a harmonic oscillator to electrical devices such as an LC circuit.

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### How to find equation of motion of the bob in this situation? [closed]

Imagine a ball is travelling in a bumpy road like the graph $\sin x$ (I'm using $\sin x$ just as an example, it has no significance in the question I guess). So, a ball is travelling in this way and a ...
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### When we talk about natural frequency of an object in the context of resonance, what exactly is vibrating, the electrons or the entire atoms?

And how exactly do objects acquire "natural frequencies"? Is it due to the temperature and the lattice structure (the type of bonds they form with other atoms)? And thus, is resonance just a ...
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### Why is it possible for us to "hear" acoustic phonons, but not optical phonons?

The name itself suggests that we can hear acoustic branch of phonon modes (and not the optical branch), but other than that I do not see any reason whatsoever why we are able to hear them. In order to ...
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### Trying to prove the wave equation from circle

Imagine one of the point in the wave. It is in oscillation. So its displacement can be written as $Y = A\sin(\theta)$ where $\theta= \omega t$. $$Y(t)=A\sin(\omega t) \tag{1}$$ Time for one wave ...
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### Why does resonance take place? [closed]

Resonance takes place when external driving frequency equals the natural frequency of an object. I know every objects have their natural frequency. But I can't see everything vibrating on its own, ...
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### Is the drag coefficient the same thing as damping coefficient? Can I find the drag coefficient using the data of a damping oscillating sphere?

I am currently working on a lab experiment to find a relationship between the diameter of a sphere and its drag coefficient. I will be using a spring-mass system that oscillates vertically and then ...
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### Is damping rate of a pendulum dependent on the number density of the gas?

Robert Boyle in 1660 conducted experiments where he pumped air out of a vessel with a swinging pendulum. He discovered that the damping rate of the pendulum is independent of the number density of the ...
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### How Ultrasonic diffuser work?

i have studied A2 physics where i have learnt resonance and evaporation, i wondered how the ultrasonic diffuser work. my inital thought was that i guess water have it's own natural frequency, the ...
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### Unable to understand waves [closed]

I am unable to understand what actually is a wave. A google search gives the definition -In physics a wave can be thought of as a disturbance or oscillation that travels through space-time, ...
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### Interpreting physical meaning of normal modes

What really is a normal mode? Maybe it's because of my teachers but I find it really abstract. I know that "numerically" corresponds to the eigenvectors of the equation $\ddot{X}= -M^{-1}KX$ ...
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### Why does the gyroscope oscillate a little when it just starts to precess?

I was reading up on why before starting the precession the gyroscope "goes down a little", (Link at the bottom). In this paper, while looking at the graphs I observed that before reaching ...
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### What happens after steady-state forced oscillation when there's no force?

What happens when a steady-state forced oscillation stops being driven by a force? Does it inherit the frequency or it becomes a natural frequency? If the oscillation is damped, would it become the ...
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### How is harmonic motion (specific and not a special case) different from periodic motion? [duplicate]

I have seen written in many books that a motion that repeats itself after a specific time period follows periodic or harmonic motion. However I know for a fact that damped harmonic motion cannot ...
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### Oscillator problem [closed]

A material point of mass $m$ is elasticly connected to the origin of coordinates. Communication energy: $U=(k/2)r^2$, $k$ - coefficient of elasticity of the bond; $r$ - distance to origin. The point ...
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### Pendulum Tuned Mass Damper - Mathematical Relationship between Mass and Damping Ratio

I am doing an experiment where I built a test tower with a pendulum to act as a tuned mass damper, similar to this picture below: I want my independent variable to be the mass of the pendulum (which ...
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### Why is a phase shift through a time delay not used for damping in vibration dampers?

Why do oscillation dampers use signal conversion through a sufficiently massive electrical circuit (with resistors, capacitors, diodes) to create antiphase, instead of simply shifting the signal in ...