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Questions tagged [equilibrium]

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).

1 vote
1 answer
1k views

Upper equilibrium point of a pendulum with small perturbations

I remember the following fact about a rigid pendulum: The point when the pendulum weight is lowest is a stable equilibrium while the point where the pendulum weight is highest is an unstable one. But ...
Phira's user avatar
  • 2,072
82 votes
7 answers
11k views

Why is the Earth so fat?

I made a naive calculation of the height of Earth's equatorial bulge and found that it should be about 10km. The true height is about 20km. My question is: why is there this discrepancy? The ...
Mark Eichenlaub's user avatar
4 votes
2 answers
2k views

Calculate stainless steel pole necking limit

Background Trying to determine how much weight a post can support without necking when a monitor is attached to an articulated arm: a cantilever problem. Problem There are three objects involved in ...
Dave Jarvis's user avatar
5 votes
1 answer
458 views

Boltzmann distribution for chemical potentials

I read that if we have a system with two co-existing phases with chemical potentials $\mu_1$ and $\mu_2$, respectively, then, at the equilibrium, the concentrations $X_1$ and $X_2$ are related by the ...
Andy Bale's user avatar
  • 1,987
6 votes
2 answers
9k views

What determines the (minimum) angle at which a domino falls over?

Dominoes, when placed upright, remain that way. Sometimes, even if you tip them a little bit, they will go back to their upright position. However, if you tip them too far, they will fall over. ...
Justin L.'s user avatar
  • 6,000

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