All Questions
4
questions
2
votes
1
answer
210
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Conflict between a system lowering its potential energy and kinetic energy
Every system in the universe has a natural tendency to attain a state of minimum energy. The state of minimum energy corresponds to a state of maximum stability.
These are from a renowned book. I am ...
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1
vote
1
answer
75
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In mechanics ($\mathrm dV/\mathrm dx = 0$) in equilibrium, what about thermodynamics?
In mechanics we say that net force acting on a system is zero ($\mathrm dV/\mathrm dx = 0$) in equilibrium. In a similar way, which quantity should remain constant in thermodynamics?
- 457
0
votes
1
answer
372
views
free stress boundary condition
I would like to understand better the free stress boundary condition. Indeed, force equilibrium writes $\nabla.\sigma=0$, and not $\sigma=0$, so which basic physical principle (such as force ...
- 482
1
vote
1
answer
7k
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Mechanical equilibrium: thermodynamics and classical mechanics
A similar question was asked here but mine is a bit different.
In thermodynamics, a mechanical equilibrium is defined as a uniform pressure (for a fluid).
In classical mechanics, equilibrium is ...
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