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Sep 19, 2019 at 23:10 comment added Ventifacts and Yardangs Are you taking the 5/minute thing as a literal law here? I don't see how else you're getting something as specific as 6 seconds. I just used it as a rough estimation of how quickly cars could drive around a minimally tight circle, it has nothing to do with the duplication process itself. Please don't make assumptions about how this works. We're already way off track from the question, which was about whether a duplicated army could launch a country's nukes. I really don't want to fall down this rabbit hole.
Sep 19, 2019 at 17:10 history edited mjt CC BY-SA 4.0
note time to 1m of sea level rise.
Sep 19, 2019 at 16:55 comment added mjt @GiladM In that case, you can send data backwards in time to different universes. Push a stick half way through, someone grabs the other end, and you push/pull in morse code. Each successive source universe will get data from 6 seconds further in the future in the receiving universe.
Sep 19, 2019 at 12:29 history edited mjt CC BY-SA 4.0
Lower flow rate figures.
Sep 19, 2019 at 12:26 comment added Ventifacts and Yardangs To answer your question, no, nothing gets chopped off. It's just that objects moving from parallel universes to ours have to move in a complete circle, out of one side of the portal and into its own other side. Gravity alone can't cause it to do that, since it ends up at the same potential energy, and linearly-increasing flow rates will overwhelm any pump system I can think of that would try to make this happen artificially.
Sep 19, 2019 at 12:18 comment added Ventifacts and Yardangs @mjt I know, I just didn't go over all the mechanics because I knew that would lead to more questions than answers. This answer is probably a good response to the question as stated; it just doesn't help me with my problem. That's my own fault for not finding a good way to concisely phrase everything about how this works.
Sep 19, 2019 at 11:37 comment added mjt @GiladM Nothing specifies there's a length limit to the thing that can be duplicated, or the time that thing takes to pass through the portal. Do you mean the portal chops off anything after a few meters length, or a few seconds of being open?
Sep 19, 2019 at 9:02 comment added Ventifacts and Yardangs @Luaan okay, it's actually more complicated than that. You're right, water will flow out of the first portal (if you block one of the sides, since they're double-sided), but due to how the portals in parallel universes are oriented, you can't get a linearly-increasing flow rate through it. All you can do is double the flow rate, just having one universe's river flow into another. To do more, you'd need more portals, which I'm not allowing.
Sep 19, 2019 at 8:59 comment added Holger @Luaan even if you manage this, there’s an older answer already suggesting that, which has been debunked even before this answer was created. I don’t know why this answer saying the same thing got so many upvotes. Perhaps, due to the author’s confidence when presenting the totally wrong, made up numbers…
Sep 19, 2019 at 8:55 comment added Holger @Bergi besides the ridiculous prerequisite of getting 2000m³/s through a car-sized portal, any number of this answer seems to be just invented instead of calculated (it’s hard to believe that someone makes so many mistakes in a row). Even if you manage to produce 2000m³/s of water, it produces only 505km³ in eight years, which Earth would hardly ever notice (a raise in the magnitude of not even a millimeter).
Sep 19, 2019 at 7:47 comment added Luaan @GiladM That means throwing it in an ocean wouldn't work, but a river still should work fine - there already is a gradient between the input and output side (just like the one you need for cars to come from your parallel universes :)).
Sep 18, 2019 at 22:58 comment added Bergi Nice idea, but hardly any river gets 2000m³/s through a car-sized portal.
Sep 18, 2019 at 17:30 comment added Ventifacts and Yardangs Not how the duplicator works unfortunately. The gateway occupies the same space in all parallel universes, so if one of them is underwater, they all are, including the output gate. No net flow.
Sep 18, 2019 at 16:40 comment added joojaa Ah, so this is the backstory of waterworld. Not everybody killed though. But replace the river with a big stream of something really toxic (in a chem plant or something) or just the dirtyest possible stretch of river perhaps, salt water a plus too.
Sep 18, 2019 at 16:00 history answered mjt CC BY-SA 4.0