Activity for viila‭

Type	On...	Excerpt	Status	Date
Answer	—	A: Where would a technologically advanced group of people forced into space by a calamity obtain water from? In addition to all the other answers, do also note that you don't need to necessarily obtain water, all you need is hydrogen and oxygen and you can create water. Hydrogen is the most common element in the universe, but most of it is inconveniently in stars, gas giants or spread tenuously in open sp... (more)	—	over 4 years ago
Answer	—	A: Duplicate Earth and Moon, where should I put it? Counter-Earth is too massive to stay in any of Earth's L points. As Theraot points out only L4 and L5 are stable for objects much smaller than the main body. Another Earth would be too massive, and also Jupiter is too massive so it would also perturb Earth's L points. So you need to move Jupiter. ... (more)	—	almost 5 years ago
Answer	—	A: Is there other similar/better method like TENS units for external control of human muscles? Theoretically you could do this using magnetic stimulation of neurons. The magnetic field induces an electrical potential in the neuron which actives the neurons and it can work from (small) distance without requiring electrodes on the body. Current devices are pretty coarse and can only affect mod... (more)	—	almost 5 years ago
Answer	—	A: What would be the dangers of creating matter from nothing There is nothing inherently dangerous about matter that has been created out of nothing (indeed, that's how all the matter around us has originally been created). However the method itself can be dangerous. In real physics matter is created when enough energy is concentrated in small enough volume. ... (more)	—	almost 5 years ago
Answer	—	A: Modified stem cells as a resuscitation serum after death by cyanide poisoning? There is absolutely no way to resuscitate someone who has been dead for long without basically magic-level-tech. When a cell dies all the metabolic functions cease. They stop ion transport which alters the osmolarity balance and many cells simply rupture because they draw in water from outside the c... (more)	—	about 5 years ago
Answer	—	A: What would influence an alien race to map their planet in a way other than the traditional map of the Earth Maps don't have to be geographical, they can also be diagrammatical, like the London Tube map. For instance, ancient Roman maps, the itinerarium, were graphs showing points of interest along a road rather than geographical relations. A branch in the road was a branch in the graph line. Another appro... (more)	—	about 5 years ago
Answer	—	A: The One-Electron Universe postulate is true - what simple change can I make to change the whole universe? This universe is fundamentally impossible, since some electrons have their worldlines terminated in a black hole. Without a full working model of quantum gravity, we can't make any firm predictions about what happens to such electrons, other than the singularity is likely to end their existence. The ... (more)	—	over 5 years ago
Answer	—	A: Using light as a barrier to block people without grilling them Not with light pressure. You need 300 megawatts of radiation flux for each Newton of force on the object (equivalent to the force exerted by a 100 gram weight). However, you can use microwaves as non-lethal deterrent. A moderate microwave flux is extremely painful on skin, well before it becomes dam... (more)	—	almost 6 years ago
Answer	—	A: How would a real modern day space shuttle operate without satellites or any kind of communications signals? If you are concerned for only the safety of the crew, and not about re-using the Shuttle, you don't have to do a precision re-entry. You can re-enter anywhere and then bail out once the shuttle is slow enough: http://mfwright.com/shuttlejump.html (more)	—	about 6 years ago
Answer	—	A: Real DNA encryption (or at least making it hard to decode/change) The big problem here is that the organism has to be able to decode its own DNA. Therefore the "decryption mechanism" has to be built-in in the organism. You can make it more obscure by hiding the important bits in lots of junk DNA. You can make decoding and encoding more difficult by using things li... (more)	—	about 6 years ago
Answer	—	A: How could an alien mine exist under a planet's surface without humans detecting it from above? An underground mine would remain undetected pretty much without any special precautions. Assuming they're not using heavy explosives, or anything like that, just drilling and excavating. The ground is extremely good at blocking EM, so it will be safe from any scanners of that ilk. Same goes for acou... (more)	—	over 6 years ago
Answer	—	A: Alien message: arrows and sequence order Introduce your sequence symbols temporally. Instead of broadcasting a single image of a "comic strip", broadcast a sequence of separate images that show the progression of the sequence markers. First image shows a single ●, pause, second image shows two ●●, pause, third image shows ●●●, e... (more)	—	almost 8 years ago