Background: I've been using several SE sites for several years now. I am used to their systems and strict rules, respect them, and try to obey as much as possible. However I do not understand this on-hold one of my posts got.
This is partly a factual physics question. My book did not explain this topic with enough detail for me to be able to make this out on my own. This is not a numerical question. I don't have to do any maths here. So what "effort" do you want me to show?
I also don't understand how my question is NOT "useful to the broader community, and to future users". It certainly contains a proper question plus a proper detailed answer. This site didn't have this question before, now it does.