Genady

A full video. Several of them. I can stop interfere and just tell you, that this answer is wrong and think of another one. Or I can suggest a mental experiment, like this: It could suggest the answer without more videos perhaps.

I just add information as if you make an experiment and get the result. My only evidence is a detailed explanation of what is happening, but that would ruin the puzzle.

I see. Yes, it is not what I thought it is. Sorry for that. Now I understand your answer. It is correct! +1

Yes. It is not so. It does not make sense. IMO, it was dead on arrival.

Hint:

It is heavy headed.

@exchemist, your answer is correct. +1.

Yes! +1

I assumed you did. I wanted to mention them for other readers.

Why does the hourglass not start rising right away?

Let's make this a bit more interesting. Consider a cylindrical glass and four identical balls packed into it compactly, as shown: How much water is needed to exactly cover the balls compared to the volume occupied by the balls?

However, if x is a complex number, there are many solutions. Not exact, though. One seems to be ~ (-0.28+0.46i), if my algebra is not mistaken.

Too easy. Belongs in this forum: Brain Teasers and Puzzles - Science Forums.

We will not need to do any of that. We'll be just floating in space in individual capsules living each in their own virtual reality.

I've read 2001 in Russian translation, but they never published 2010. They said it had some "wrong" societal or political themes in it.

Well then, I don't have the priority, but believe me, I did not plagiarize the idea. Nice.

PS. A thought just crossed my mind, that the question and the answer work perfectly well even for a "string" with only two circles on it.

Jupiter is a failed star. We should fix that.

Like in the related thread, thanks a lot for all the suggestions and thoughts.

Thank you very much for all the suggestions and thoughts.