AskScience AMA Series: I am a former Senior VP of Knowledge at Google who broke the world record for highest free-fall jump in 2014. Ask me anything! |
- AskScience AMA Series: I am a former Senior VP of Knowledge at Google who broke the world record for highest free-fall jump in 2014. Ask me anything!
- Does the universe have an event horizon?
- What theoretical results would we learn if the LHC *did* produce a micro black hole?
- Gif of guitar. Why does all the strings not show standing waves?
- Theoretically, can all elements become stable if you add or subtract neutrons to it?
- What stops us from constantly chomping down on our tongue as we eat?
- Is the universe expanding in time as well as space? If so, how could we possibly know that?
- What volume of outer space would you need to inhale to take a single breath?
- 22,000 years ago, the Earth was 4C cooler. How did these few degrees result in huge swaths of land being buried under ice?
- What happens when you confine plasma with magnets?
- What was the “common view” on hidden variables theory in the time between the 1935 EPR paper and the 1972 (etc.) quantum entanglement measures?
- What is the point on the moon surface perpendicular to L1?
- Why are astronauts able to move at the same speed (8 km/s) as the ISS during a spacewalk?
- How does the Uncertainty Principle affect entropy?
- Optimal betting strategy in a game of chance?
- Why do neutrons shoot through dense material, but get reflected by softer material during Radiography?
- Is it possible to simulate an atom or molecule from the standard model or string theory?
- Saw CNN story about: 'Man dissolves in acidic water after he falls into a Yellowstone hot spring' is that even possible?
| Posted: 18 Nov 2016 05:00 AM PST Hi, reddit! I'm Alan Eustace and I'm here with Jerry Kolber. We're the subject and director, respectively, of the documentary 14 MINUTES FROM EARTH, which premiered at the Tribeca Film Festival in April of this year and was released On Demand this past Tuesday. Jerry's film documented the process by which I broke the world record for high-altitude jump in 2014 at the age of 57 when I dropped from a gas-powered balloon 135,000 feet above the earth. Check out the film's trailer! The plan began as a scribble on a paper napkin and took three years of working in secrecy to come to fruition. In 2011 I began working with Taber MacCallum and Jane Poynter, co-founders of Paragon Space Development Corporation, to bring the plan to life. Because a private citizen cannot simply purchase a space suit from NASA, we also worked with ILC Dover, outfitters of every United States astronaut in the Apollo program. Jerry Kolber, the film's Executive Producer and Director, is the co-creator and show runner of the Emmy-nominated series "Brain Games" on National Geographic, and has created, produced, and served as showrunner on many other award-winning scripted and un-scripted series. Learn more about his work. Ask us anything about the jump or the film! We'll be online at 2:00pm EST to answer your questions. [link] [comments]  |
| Does the universe have an event horizon? Posted: 17 Nov 2016 09:02 AM PST Before the Big Bang, the universe was described as a gravitational singularity, but to my knowledge it is believed that naked singularities cannot exist. Does that mean that at some point the universe had its own event horizon, or that it still does? [link] [comments]  |
| What theoretical results would we learn if the LHC *did* produce a micro black hole? Posted: 17 Nov 2016 10:49 PM PST I'm not at all worried about the safety of this, that's silly. However, lots of articles about the potential for LHC to produce "micro-black-holes" talks about various theories that this discovery would imply. http://angelsanddemons.web.cern.ch/faq/black-hole
http://phys.org/news/2015-03-mini-black-holes-lhc-parallel.html
https://en.wikipedia.org/wiki/Micro_black_hole#Feasibility_of_production
I'm basically wondering what would have to be true about the universe in order for us to find micro black holes at the 14TeV level? If we did find them, what would that imply? Why would the micro black hole prove that extra dimensions exist? What does it mean to have "Extra spatial dimensions" in layman's terms? How many dimensions would it imply? How does it resolve the black hole information paradox? How does it relate to "Planck mass"? What else would we learn from this discovery? [link] [comments]  |
| Gif of guitar. Why does all the strings not show standing waves? Posted: 18 Nov 2016 06:37 AM PST I saw this gif in r/gifs of a guitar strings. I was puzzled why sometimes the waves are traveling slowly. Why are they not "standing still"? I think I've had guitars where some notes appear to fluctuate (observed when plucking a single note). Could these things be related? Any physics/music/guitar nerds who knows? [link] [comments]  |
| Theoretically, can all elements become stable if you add or subtract neutrons to it? Posted: 17 Nov 2016 04:16 PM PST |
| What stops us from constantly chomping down on our tongue as we eat? Posted: 17 Nov 2016 03:24 PM PST |
| Is the universe expanding in time as well as space? If so, how could we possibly know that? Posted: 17 Nov 2016 11:07 PM PST I've seen the question 'how do we know the universe is expanding' posted a lot, but they're always asking about matter inside expanding space. We measure the redshift of distant galaxies to detect the expansion of space, but if time is also expanding wouldn't these effects be cancelled out? [link] [comments]  |
| What volume of outer space would you need to inhale to take a single breath? Posted: 18 Nov 2016 12:36 AM PST Of course, outer space is very much devoid of oxygen, but if you were to take an average breath, what volume of outer space would you need to suck up each time? [link] [comments]  |
| Posted: 17 Nov 2016 10:25 AM PST I was looking at this comic, which is a graphical representation of climate change over the last 22,000 years. Apparently, at the start of the graph, the Earth was 4 degrees cooler than it currently is. Under these conditions, Boston was under a mile of ice, and New York City had glaciers next to it. Looking at the current summer average high temperatures in Boston, even if you knock 4 degrees off them, you'd still have plenty of days at around 22C or 23C. How can that result in being buried under a mile of ice? [link] [comments]  |
| What happens when you confine plasma with magnets? Posted: 18 Nov 2016 04:53 AM PST What happens when you confine plasma with magnets? When something reaches its plasma state, the electrons gets delocalised from their atoms. The overall charge of the plasma field should be neutral, since the electrons are still there, even though they are delocalised. A magnet would therefore not be able to attract or retract the plasma. But it does obviously Any explanation? [link] [comments]  |
| Posted: 18 Nov 2016 01:00 AM PST In particular, I came to believe that hidden variables were generally accepted in 1935 (because Einstein said so) - what was the breakthrough step in making them rejected: Bell's paper or the experiments? [link] [comments]  |
| What is the point on the moon surface perpendicular to L1? Posted: 18 Nov 2016 04:31 AM PST Does it have a name? If not how can I find its coordinates? Since the moon is tidally locked this point should never move with respect to the lunar surface right? I'm talking about L1 in the moon-earth system of course [link] [comments]  |
| Why are astronauts able to move at the same speed (8 km/s) as the ISS during a spacewalk? Posted: 17 Nov 2016 08:54 PM PST |
| How does the Uncertainty Principle affect entropy? Posted: 18 Nov 2016 12:08 AM PST Hi, I was studying from my chemistry book on the chapter of entropy and I read something very weird.
I don't know what: 1- Being a pure crystal have to do with having no disorder/entropy? 2- Uncertainty Principle relates to entropy?? Thanks in advance. [link] [comments]  |
| Optimal betting strategy in a game of chance? Posted: 17 Nov 2016 07:56 PM PST Hello everyone, I have a question for those of you with a mind for statistics in regards to a game of chance. Suppose you have a game of chance, and the odds in this game are fairly consistent, random, and known ahead of time. In that game you can place a wager of any quantity you desire out of a starting amount (let's assume 100). If you win, you get a net return of 70% of the wager, but if you lose it is a total loss of whatever you risk. As you win, you may again place any wager you desire out of the new total now possessed. For this game let's assume the odds of winning are 80%, what would be an ideal wager in each successive step that allows an optimal increase in total without taking a massive setback in the event of a loss? I hope this is a clear enough description of what I'm asking. [link] [comments]  |
| Posted: 17 Nov 2016 12:43 PM PST I understand that it has to due with the transfer of momentum from the particle colliding with the nucleus of the atoms in the material, but I'm having a difficult time understanding why it shoots through the dense solid. Why doesn't it bounce off of the surface similar to a pool ball hitting the side of the pool table? [link] [comments]  |
| Is it possible to simulate an atom or molecule from the standard model or string theory? Posted: 17 Nov 2016 08:11 PM PST From the current knowledge of standard model/string theory, can a simulation of something like the hydrogen atom be done using the physics of its constituent elementary particles (or strings)? Has this been done before? What kind of computational costs would a simulation like this have? [link] [comments]  |
| Posted: 17 Nov 2016 03:18 PM PST http://edition.cnn.com/2016/11/17/us/yellowstone-man-dissolved-trnd/ this is the news link. I know some basic chemistry, water is polar, so it shouldn't be able to dissolve carbon based molecules like the man's body or his shoes. So is this possible given the water pH/high temperature? and how? [link] [comments]  |
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