AskScience AMA Series: We're scientists and entrepreneurs working to build an elevator to space. Ask us anything! |
- AskScience AMA Series: We're scientists and entrepreneurs working to build an elevator to space. Ask us anything!
- Why are good conductors of electricity also good conductors of heat?
- How can the diameter of the Universe exceed its age?
- Why does 3*7 give the same result as 7*3?
- Is time just the way we measure how long gravity is taking to pull us toward whatever it is pulling us towards?
- How can you get an image of the sun with neutrinos?
- Why is it that I can come up with a relationship between sequential integers, sequential integer squares, but not sequential integers of higher order exponentials? Is this related to Fermat's Last Theorem?
- Can light cast a shadow?
- At what rate does water freeze? As in, when the portion of water reaches freezing temperature, does it freeze in an instant in its entirety, or does it start a discrete point and progress through the entire portion of water? If so, at what speed?
- Why can't two snow flakes be identical?
- How do we know that E = mc^2 is correct?
- Does magnetism effects change by the velocity of c?
- Many primates have complex social structures with similarities to ours. Have we ever observed "grandparents" trying to help their offspring reproduce?
- Does it take more energy to make an LED light blink, or remain constantly on?
- What was the Panthalassic Ocean like? Wild massive waves and storms? Or basically the same as today's Pacific Ocean?
- Does the Nitrogen in the air we breathe have any effect on our body?
| Posted: 02 Dec 2015 05:00 AM PST Hello r/AskScience! We are scientists, entrepreneurs, and filmmakers involved in the production of SKY LINE, a documentary about the ongoing work to build a functional space elevator. You can check out the trailer here: https://www.youtube.com/watch?v=1YI_PMkZnxQ We'll be online from 1pm-3pm (EDT) to answer questions about the scientific underpinnings of an elevator to space, the challenges faced by those of us working to make the concept a reality, and the documentary highlighting all of this hard work, which is now available on iTunes. The participants: Jerome Pearson: President of STAR, Inc., a small business in Mount Pleasant, SC he founded in 1998 that has developed aircraft and spacecraft technology under contracts to Air Force, NASA, DARPA, and NIAC. He started as an aerospace engineer for NASA Langley and Ames during the Apollo Program, and received the NASA Apollo Achievement Award in 1969. Mr. Pearson invented the space elevator, and his publication in Acta Astronautica in 1975 introduced the concept to the world spaceflight community. Arthur Clarke then contacted him for the technical background of his novel, "The Fountains of Paradise," published in 1978. Hi, I'm Miguel Drake-McLaughlin, a filmmaker who works on a variety of narrative films, documentaries, commercials, and video installations. SKY LINE, which I directed with Jonny Leahan, is about a group of scientists trying to build an elevator to outer space. It premiered at Doc NYC in 2015 and is distributed by FilmBuff. I'm also the founder of production company Cowboy Bear Ninja, where has helmed a number of creative PSAs and video projects for Greenpeace. Hey all, I'm Michael Laine, founder of [LiftPort](http://%20http//liftport.com/): our company's mission is to "Learn what we need to learn, to build elevators to and in space – and then build them." I've been working on space elevators since 2002. Ted Semon: former president of the International Space Elevator Consortium, the author of the Space Elevator Blog and editor of two editions of CLIMB, the Space Elevator Journal. He has also appeared in the feature film, SKY LINE. [link] [37 comments]  |
| Why are good conductors of electricity also good conductors of heat? Posted: 02 Dec 2015 05:46 AM PST I understand that good electrical conductors are such because of their free electrons. But why is this correlated with heat conductance? [link] [3 comments]  |
| How can the diameter of the Universe exceed its age? Posted: 02 Dec 2015 02:27 AM PST The Universe is 13.8 billion years old and the observable Universe is about 93 billion light years across. How is this possible? If I had to guess, I'd wager that the Universe must have expanded faster than the speed of light at some point in its evolution. I'm not sure if that makes sense though, and details would be lovely. [link] [5 comments]  |
| Why does 3*7 give the same result as 7*3? Posted: 02 Dec 2015 04:44 AM PST Everyone I ask this question to is looking at me as if this completely obvious, but I really don't understand why it is that if I (for example) calculate the total number of nails that must used to fix a door, the answer is the same when I use 7 nails for 3 doors, or 3 nails for 7 doors. The answer to both questions is 21 nails. Why is it that the outcome of any multiplication is the same for any number? Thanks in advance for explaining the obvious to me (that I don't see) [link] [14 comments]  |
| Posted: 01 Dec 2015 08:25 AM PST It seems like time/gravity are intertwined but if we can see light from the past, which is a measurement of time, is this only because gravity has an effect on light? I just keep coming back to time/gravity and feel I dont know enough about their relationship. [link] [36 comments]  |
| How can you get an image of the sun with neutrinos? Posted: 01 Dec 2015 09:40 PM PST I saw this image posted to reddit a few months ago. A neutrinos detector was used to generate an image of the sun. I haven't been able to find any information on how this image was actually created, though, and would appreciate if anyone could explain. Since neutrinos interact with matter so rarely, it seems implausible that any imaging modality analogous to photon-based systems would work. So how do you get the spatially localized information that you see in this image? [link] [4 comments]  |
| Posted: 01 Dec 2015 08:44 PM PST Alright reddit, I was holding onto this revelation since high school, but now it's time to outsource the answer. If a, b, and c are sequential integers(eg. 4, 5, 6), then to find c, you need to look at what was incremented between a and b. In other words c = ( b - a ) + b. If we look at sequential squares, then c2 = ( b2 - a2 ) + b2 + 2. My questions are three: is there a significance to the additional incremental value 2? Are there additional relationships relating c3 to the difference of b3 and a3 ? Is this in any way related to Fermat's Last Theorem? [link] [1 comment]  |
| Posted: 01 Dec 2015 07:56 AM PST I'm not exactly sure the best way to articulate this question but maybe someone can give some information on the subject. Can the flame from a candle block the light from a light bulb? Do photons bounce off each other? Do they pass through in a straight line or is the light refracted? [link] [28 comments]  |
| Posted: 01 Dec 2015 05:24 PM PST |
| Why can't two snow flakes be identical? Posted: 01 Dec 2015 08:32 AM PST If it is statistically possible for your laundry to come out of the dryer already folded, shouldn't it be possible that two snowflakes somewhere can be identical? [link] [28 comments]  |
| How do we know that E = mc^2 is correct? Posted: 02 Dec 2015 01:22 AM PST How do we as humans, who cannot convert energy to mass and vice versa (I think) know that E = mc2 is correct? And how could Einstein know? [link] [4 comments]  |
| Does magnetism effects change by the velocity of c? Posted: 01 Dec 2015 08:08 AM PST I read a german article about magnetic fields and it says, that "Changes in a magnetic field spread out with the light of speed". Is this true? And if so, how is it possible? (If there are any curious german people here, there is the source: https://www.lernhelfer.de/schuelerlexikon/physik-abitur/artikel/magnetisches-feld ) Thanks for the answers :) [link] [5 comments]  |
| Posted: 01 Dec 2015 03:08 PM PST It makes sense to me that natural selection would select for genes that not only help the immediate offspring survive to sexual maturity, but also help those offspring reproduce. This could be anything from an alpha primate putting his offspring near suitable mates to a bird helping his son build a courtship bower. Has anything like this ever been observed, or even investigated? Total coincidence that I ask this right after Thanksgiving [link] [4 comments]  |
| Does it take more energy to make an LED light blink, or remain constantly on? Posted: 01 Dec 2015 07:06 AM PST |
| Posted: 01 Dec 2015 04:54 AM PST The Panthalassic Ocean was the vast global ancestral Pacific ocean that surrounded the supercontinent Pangaea, during the late Paleozoic and the early Mesozoic eras. It covered most of the globe. Given this size, was their an oceanic equivalent of the continental effect? What would the weather have been like? Super-cyclones and giant waves? [link] [1 comment]  |
| Does the Nitrogen in the air we breathe have any effect on our body? Posted: 01 Dec 2015 07:11 AM PST |
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