|Steady state has been listed as a level-5 vital article in Science, Physics. If you can improve it, please do. This article has been rated as Start-Class.|
|This article is of interest to the following WikiProjects:|
Some or all properties unchanging?
"This implies that for any property p of the system, the partial derivative with respect to time is zero"
In the cosmological Steady State Theory, the amount of matter in the universe and the size of the universe are known to be changing.
- Sorry to say so, but seven months after my remark above, the intro is still crap.
- "A system in a steady state has numerous properties that are unchanging in time." Numerous implies more than one. Are there no steady-state systems with exactly one unchanging property? "This implies that for any property p of the system, the partial derivative with respect to time is zero". I see no such implication. "Numerous" does not imply "all".
- "for any property p of the system, the partial derivative with respect to time is zero" So if "properties" are the only things observable, then no change whatsoever is observable.
- If the speed of a particle is unchanging and non-zero, then its position is changing. So if "speed" in general is a property, then "position" is not a property.
- Therefore it seems like crap.
- Somebody who knows what they are talking about please fix this. Thank you.
On the Dubious-Discuss tag
- A chemical engineering system is only marginally more complicated, and I would argue that the added complexity is uneeded in a simple example. In a chemical engineering probelm, considering a mixed bath with steady state in-flow and outflow is a normal problem. Would it be more clear that it is chemical engineering if we instead look at how a bath withtwo inlet flows with different components and one outlet flow eventually cause a steady state composition of the bath (see: Continuous_stirred-tank_reactor)? EpicScizor (talk) 07:59, 16 July 2020 (UTC)