Activity for Mindwin‭

Type	On...	Excerpt	Status	Date
Question	—	What is a feasible timeframe for a super-reactor to obsolete all other energy sources? A super-reactor was created by SRE, Inc (Super Reactor Energy), and it can provide as much clean energy as needed. There's no way to copy it or make another. It operates without problem or fuel - therefore SRE can sell the energy at a low price - and the competition kills all other energy sources as ... (more)	—	almost 5 years ago
Question	—	How can a person Insulate copper wire in a medieval world? Time traveler here, stranded in the year of 1019 AD, medieval ages. Location: europe. While I can still access and post on web forums because my temporal transmitter has a 1Ky range, I have a broken solenoid. Thing melted down and it is part of my flux capacitor. And as a security measure my ship loc... (more)	—	about 5 years ago
Question	—	What metallic alloys would be used for weapons and armor in the XXI century knighthood games? The year is 2035 and Channel 55-KYED decided on a new reality show. the XXI century knighthood games. It will be your basic renaissance faire re-enactment of medieval combat but since they are doing it in the extraterritorial micronation of Garlandistan they are doing it just like they did in Aginco... (more)	—	over 5 years ago
Question	—	When is the earliest in Earth history when Grade 5 Titanium alloy could be made, assuming one knows the formula and has the feedstock? Bob the time traveler has a problem. He went to 75,000,000 BC to get some dinosaur eggs (don't ask) and his time machine re-combobulator broke and a big chunk is missing. Fortunately he can still make one jump forward in time, but he can't go as far as the XXIV century (his home era). Mostly he coul... (more)	—	over 5 years ago
Question	—	A medieval fantasy adventurer lights a torch in a 100% pure oxygen room. What happens? Exactly what it says on the tin. Kleeber the warrior is wearing a gambeson and carrying the standard adventurer's gear (leather backpack, 100ft of hemp rope, bedroll, spare clothes, waterskin, dry rations, and the 10 foot pole, some metal knicknacks like a spork, a knife, etc) and some weapons (longs... (more)	—	over 5 years ago
Question	—	How can a valley surrounded by mountains be fertile and rainy? We all know about Rain Shadow - And if you don't now you do - and that the inner side of a mountain as compared to the ocean would be drier. Now a worldbuiding problem going around that phenomenon. Imagine a large and wide valley (several dozens of miles wide in all directions) surrounded by tall mo... (more)	—	over 5 years ago
Question	—	How far can civilization go without inventing the calendar? While only counting seasons and years, but not weeks or months, how far can human civilization progress? Can they reach the middle ages? Or is the invention of the calendar such a cornerstone of civilization that it is inevitable for it to exist? (more)	—	over 6 years ago
Question	—	How can I modern time traveler determine solstice and equinox? A XX century researcher time traveled back into the prehistory. He is not in danger of death or anything, but he has only energy to attempt one jump. He must jump back during the sunrise either in a solstice or an equinox. How can he determine when it will be? He only brought handheld analog tools... (more)	—	over 6 years ago
Question	—	Why can't spaceships go underwater? It is a somewhat common limitation of spaceships in some universes, that they cannot go underwater. They can land on the planet, take off into orbit, hyperdrive into the next star system, but they cannot dive in water. A different vehicle is required to go underwater. But exactly why is that so? In... (more)	—	almost 7 years ago
Question	—	A 40km diameter alien saucer is floating 2km above the ocean for a long time. What are the effects on the sea ecosytem below? Twenty years ago, a 40km diameter alien saucer came to Earth, and stopped 2km above the Atlantic ocean, somewhere near the midpoint between Casablanca, Morroco and Natal, Brazil but over international waters. It is completely opaque, reflects no light or radar (but still irradiates IR as any object a... (more)	—	about 7 years ago
Question	—	Ergonomically correct eagle riders in the modern age Since Tolkien put people riding on giant eagles in his books (or maybe even before that), the imaginarium of riding the winds on the back of magnificent birds has generated a plethora of images and other media. Here is one such gallery But one thing I see, is that the positioning of the rider atop ... (more)	—	about 7 years ago
Question	—	How long for Life on Earth to disappear after the magnetic field is gone? Evil Wizard got his hands on a Handwavium Wand, and wished the Earth's magnetic field no more. Now the surface is vulnerable to solar wind, solar radiation and cosmic radiation. How long will it be till life is gone on the planet (land) surface? Bonus points if you state how long till the oceans a... (more)	—	about 8 years ago
Question	—	How technological advanced a civilization would need to be to prove the existance of the shadow Earth? In a short sci-fi story i am writing, Earth has a shadow twin. A planet with the same chemical/geological characteristics as Earth and wildlife very similar (but different species because evolution and mutations are random). The humanity in Earth-prime XXI century knows of the shadow twin existance,... (more)	—	over 8 years ago
Question	—	How would a modern stealth suit be designed using the technologies available to mid XXI century civilization? EDIT: Question timeframe changed from early XXI to mid-XXI century. Lets say 2040 decade-ish. You are the engineer in charge for the construction of the latest 's stealth suit. It should be the best personal cloaking device mid-XXI century tech could deliver. But also must: Be lightweight (maxi... (more)	—	over 9 years ago
Question	—	How does the Ash Manor get electricity? Previously on the same setting (: How close is too close for a human habitation to be near an erupting volcano? What factors could delay the rescue of a small group of survivors on a Pacific volcanic eruption? TL;DR synopsis: early XXI century, south pacific island, VEI 45 volcanic eruption, surv... (more)	—	over 9 years ago
Question	—	Design a non-computerized biometric door Nowdays we have biometric doors that can scan your eye, palm, fingerprint, ear, etc, etc... But all of them rely on electronic readers and computers to match the sample against the stored pattern. How would you design a biometric door that does not need to rely on a electronic scanner and computer,... (more)	—	over 9 years ago
Question	—	How close is too close for a human habitation to be near an erupting volcano? I am working on a survival suspense story, where a sizeable group of surivors is trapped in a tropical island (somewhere in the Ring of Fire) by a volcanic eruption. They find shelter from the erpution in an old mansion built in a high-rise cliff on the edge of the island. The cliff is sturdy and th... (more)	—	over 9 years ago
Question	—	How long would a modern human population need to be separated in order to suffer allopatric speciation? A sizeable human population was separated from the rest of the Earth people for a long time, long enough for allopatric speciation to happen. They are no longer Homo sapiens and now have ZERO reproductive compatibility with the ordinary Earth human. At the separation time, this "away team" had access... (more)	—	over 9 years ago
Question	—	Estimation on the contaminated, unlivable zone around a nuclear reactor after an uncontrolled, unattended meltdown Take a modern nuclear reactor complex. Now picture a catastrophic meltdown, not unlike Chernobyl. But this time there is nobody around to do damage control, and all control mechanisms do fail. The reactor breaches, causing the other reacotrs in the complex to meltdown too and they spills radioacive... (more)	—	over 9 years ago
Question	—	What population would a 60km radius island sustain with early XXI century technology? Lets take a 60km radius island where the people have access to early XXI century technology. The whole island was planned and artificially built, so it has no mountains or otherwise bad/sterile terrain. Since it was artificially built, there are enough rivers, lakes, and the hills /valleys were pre... (more)	—	almost 10 years ago