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Results tagged with science-based
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user 298
For questions that require plausible (better than suspension-of-disbelief) answers based on Real World science that are not necessarily constrained to the known limits of Real World science. Contrast with the hard-science, science-fiction and internal-consistency tags. This tag may not be used alone. This tag may not be used with the science-fiction, hard-science, or internal-consistency tags.
7
votes
Accepted
Calculating Time Dilation Effects on Relativistic Accelerations
The term you'll want to google is the "relativistic rocket"--there's a good page on the idea here. The equations there all deal with a rocket that accelerates at a constant rate "a" (a constant proper …
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3
votes
Is it possible to build long-lived macro-scale structures out of non-atomic substances?
There is a concept known as strange matter which has been theorized based on our mathematical models of nuclear physics, though never observed. It would be a sort of "liquid" made of quarks which aren …
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3
votes
Which fast STL drive could not be weaponized or results in perpetual motion?
Pretty much anything that allows a large chunk of mass to get from say Earth to Jupiter in just a few days could probably be weaponized simply because it's going to have a large kinetic energy (unless …
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2
votes
Accepted
How to force linear movement in space?
How about putting them on a ship or space station where the habitat modules are arranged into a ring so that the whole thing can be spun to create artificial gravity using the centrifugal force? If fo …
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2
votes
Implications of Newtonian universe
If you try to just look at what happens to Maxwell's laws of electromagnetism in the limit as the speed of light approaches infinity, one problem is that in Maxwell's theory all electromagnetic waves …
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0
votes
How can I scientifically explain the afterlife
Beings with advanced technology replicate the information in our brains
This was the solution used in the Riverworld books (where it was done by aliens), and various people have speculated that our d …
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7
votes
Is it possible to use a planet's magnetic field for transportation?
Magnetic levitation depends not just on the value of the external magnetic field B at a given point, but on the gradient of the magnetic field ∇B, which tells you how quickly the field changes as you …
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11
votes
Hard Sci-fi energy shields
Physicist Michio Kaku discusses some possibilities for shielding on p. 9-10 of his book Physics of the Impossible, viewable on google books here:
The problem with electron beam welding, however, i …
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15
votes
Accepted
Over what distance would space combat between spacecraft probably occur given physical reali...
Some useful discussion and links can be found on projectrho.com, I mentioned these in comments before the question was migrated but they were deleted in the migration, so I'll repost here. First of al …
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17
votes
Are there any ways to allow some form of FTL travel without allowing time travel?
Yes, you could use traversable wormholes (which have a reasonable degree of scientific plausibility since they are solutions to the equations of general relativity, though they would require 'exotic m …
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20
votes
Accepted
How long after a global nuclear disaster would the world become habitable by humans again?
Probably about 5-10 years minimum
Fallout would not be a major long-term problem, the timescale on which radiation due to fallout would present a serious danger would be less than 5 years. See this a …
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17
votes
What is a writing material that persists nearly forever or for a long time?
Fused Quartz Etched by Femtosecond Laser
Some articles on this technique here, here and here, and a wikipedia article with more references here. According to that first article,
The current data-writ …
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8
votes
Gravitational slingshots: could they be used to decelerate a spacecraft traveling at a small...
Yes, but to do it with a single body in a way that avoided deadly tidal forces, you'd need a black hole with around 10,000 times the mass of the Sun or more, and it would probably have to be orbiting …
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63
votes
Accepted
Why do dragons like shiny stuff?
Maybe they could have mating rituals like bowerbirds, in which the males, as part of their courtship display, strive to create visually interesting displays outside their bower (the hut-like structure …
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0
votes
(Please Someone Explain) Is time travel using wormhole as portals possible logically?
Since you were asking about wormholes and the analysis by physicist Kip Thorne, I'll assume you were asking about what would theoretically be true in Einstein's theory of general relativity, which mat …
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