医护求职故事征集计划——我有稿酬，你有故事吗？
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Equilibrium is the condition of a system in which all competing influences are balanced. These can range from forces (static/dynamic equilibrium), to chemical processes (chemical equilibrium) and temperature gradients (thermal equilibrium).
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Stability of isothermal atmosphere
I'm looking at an isothermal fluid in a vertical gravitational field. It is governed by the following equations:
$$
\begin{align}
\partial_{t} \rho &= - \nabla \cdot \left( \rho \, \mathbf{u} \...
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Does air in the atmosphere weigh 2120lbs? Why don't we feel this much pressure? [duplicate]
I was reading about how water pumps via sunction that existed for centuries work.
The limitation they have is that water has to be higher than a certain limit because the pump can not raise water over ...
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Toppling of a Table [closed]
A table has a heavy circular top of radius $1$ meter and mass $20\text{ kg}$. It has four light legs of length $1$ meter fixed symmetrically on its surface. What is the maximum mass that may be placed ...
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Energy and force equilibrium difference [closed]
As you can see the system below consist of a spring and disk with mass $m$. Question asks for $x$ that yields in equilibrium position and I know system is easy to solve. However I am confused that ...
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How does the temperature remain constant during system changes?
Thermodynamic potentials are often evaluated as a system undergoes reversible or irreversible changes, with the system subject to certain constraints such as being held at constant temperature or ...
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Number of null points between 2 magnets
I saw a problem online asking how many null points are there between two magnets kept on a plane with their north poles close to each other.
The answer was given as $3$. I get there is one null point ...
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Why isn't the electric field on a conductor's surface zero in electrostatic equilibrium?
I am grappling with a conceptual point regarding electric fields on the surface of conductors in electrostatic equilibrium. My reasoning leads me to a conclusion that contradicts established physics, ...
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Temperature equalisation which happens quicker hot vs cold?
imagine 2 identical containers containing the exact same material, same volume.
contents of container 1 is cooled to 5 degrees below the ambient room temperature. container 2 is heated to 5 degrees ...
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Detailed Balance in Non-Equilibrium Systems
I'm trying to better understand the concept of detailed balance in the context of non-equilibrium systems.
I know that detailed balance (DB) holds when the following condition is satisfied:
\begin{...
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How do we know fluid elements to be in static equilibrium?
I was going through a proof of Pascal's law when I came across the following diagram.
The proof is premised on the assumption that all fluid elements of a fluid in static equilibrium will also be in ...
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What does it mean to be in thermal equilibrium in context of Brownian Particle?
Suppose we start with the standard Langevin equation for a free Brownian particle in an infinite medium:
\begin{equation}
m \frac{dv}{dt} = -\gamma v + \sqrt{2 \gamma k_B T} \, \eta(t),
\end{equation}
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Equilibrium in Fluids (here liquids)
If in a U-Shaped Tube two immiscible liquids $l_1$ and $l_2$ are filled in the left and right side respectively and the criteria are :
The density of $l_2$ is twice that of $l_1$.
The height of $l_2$...
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Deriving isobaric heat capacity via differential geometry
I'm writing this question in connection with a question I posed yesterday: Geometric view of heat capacity to clear up confusions(It's not necessary to read it before this).Let $(T,V)$ be the ...
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How can I use physics to distribute a 3.6?kg load over multiple nails using a string? [closed]
I'm trying to solve a practical problem with what feels like should be basic physics. I've guessed that this problem might be about vectors, pulleys and trigonometry, but it's knowledge which I lack, ...
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Geometric view of heat capacity to clear up confusions
Before I ask my question, I appreciate mathematical rigor while studying physics(at least as much as I'm capable of), so I will show how I see the terminology with the language of differential ...
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