Worldbuilding SE looks like a pretty active place. They have a 'physics' tag, a 'science-based' tag, and a hard-science tag, and many of the people who frequent the site also have reasonably active Physics SE accounts.
A couple of times, I've seen questions which I think belong there, like questions about the laws of physics in hypothetical vehicles. Under what circumstances should I suggest that the OP moves their question to Worldbuilding?
Here're some helpful Worldbuilding meta posts I found
Physics questions with little to no actual story
A proposal to finalize the “are real world questions on-topic” debate
It looks like the general position over there is that if the situation is realistic and it happens, it's meant for Physics SE. But do we have some counterpart guidelines about when we should tell people that Worldbuilding is the better place for their questions?