@user1667423 Yes, a lot of basic fluid stuff carries over wholesale and is used in the analysis of Friedmann-Lemaitre-Robertson-Walker (FLRW) universes.
Taking velocities to be small and keeping first order terms is equivalent to taking $c$ to be very, very large. I think. Don't bet your life on that.
If you're interested in relativistic fluids, see some of the later chapters in Landau's fluids book and any cosmology text for a wealth of applications.
@user1667423 Since we're only concerned with the terms with ratios $v/c$, it is easy to see that $\lim_{c\rightarrow\infty}\equiv\lim_{v\rightarrow0}$.
@user1667423 What Danu means by $p=\mathcal{O}(u)$ is that we take the pressure to be small enough so that a term $\propto pu\sim 0$ in this limit.
I usually buy my books in "good" condition. Which is to say that they usually do look like someone's used them, but without any highlighting or other "abuse".
@Danu My openings are fantastic. That particular time I was trying to mate him early with the bishop-queen pairing, but he moved the pawn instead of the knight. I usually open with d4,e3.
@Danu And I think the tactic was move the rook under the queen (losing it), then moving my knight to a4 and then taking his queen
Strange question. I am working on a fictional story where a person has to carry a bucket of water for hours during a blizzard. Is there any natural way to keep a bucket of water from turning to ice in below-freezing conditions like that? Assume there are no other materials available except what c...
but from what I can tell, the gist is this: when you have a model for some system (e.g. a physical theory), the model ignores the fine details of the system's behavior, for some definition of "fine". Renormalization is a way of constructing the model so that it doesn't depend on that definition.
@DavidZ Damn :P The problem is this issue that was raised earlier in meta: People cannot VTC to arbitrary sites (although I guess it cannot be nicely fixed)
@ACuriousMind if you're using up your daily allotment of close votes I'll give you a pass :-P I can't imagine that every one of those 19 people - well, 18 who are not me (but also the comment author) is out of close votes though!
@Danu couldn't hurt
I definitely agree that the migration system is messed up, but even if people can't vote to migrate to a certain other site, they should still be voting to close as off topic
I think we've talked about that here before, no one had a really good idea. There may be some people who are unaware of the review queue, but surely the close button is not something they could be unaware of, right?
Lol...filling out an application and two questions are Estimate the number of hours you have spent programming for class and Estimate the number of hours you have spent programming outside the classroom
I dunno, when I think about all the time I spent in college calculating the rotation frequencies of orbiting beer cans or the like, I have to imagine that's pretty much "physics golf", but it still counts
Honestly, I almost never go through the review queues either. But I do scan down the front page looking for questions which look like they might be close-worthy. And I also have the mod flag queue...
I have the moderator privileges on Code Review.
Even though it's quite rare that flags appear over there, it is still quite annoying that once I have done my job with a flag and therefore cannot do anything else with it, the flag in the top bar remains there. Why do I have to keep seeing that fl...
I am glad to notice that the massively annoying refusal of the 10k flag counter to disappear when I'm not needed has been appropriately dealt with via the extreme decapitation method of simply eliminating the 10k flag queue. As of a few days ago, the orange-ish counter on the top bar now links to...
Following another feature request that was completed yesterday (Notify users of possible reviews on toolbar), users of several sites have noticed a persistent notification in the top bar for flags that need reviewing. Previously this notification pertained only to suggested edits, but it now disp...
@DavidZ As you have said many times before, being better suited for another site is in no way a contributing factor to being closed. That comment says nothing about whether or not the question is on-topic here.
@DanielSank Probably the simplest example of renormalization, taught in any first course on stat mech, is the Kadanoff decimation procedure of the Ising model. It is useful near the phase transition points where the system under study becomes scale free and can be entirely described by some scaling exponents. Surprisingly, even systems that seem very different can sometimes belong to the same universality class when it comes to their phase phenomena.
@ACuriousMind The reason why we have mandatory counseling is because a big part of the US News college rankings is "% of students who finish in 4 years".