What's going on when I'm getting a "kink in my neck" after sleeping in an odd position? |
- What's going on when I'm getting a "kink in my neck" after sleeping in an odd position?
- On Saturday Juno flew to within 4,200km of Jupiter... but within 4,200 km of WHAT exactly?
- Do computer simulations involving physics have to account for wave-particle duality? Has it posed an issue before?
- How big would proxima B look from the planets surface?
- In 1899 "Mile-a-Minute" Charles Murphy set a bicycle world record of 60 mph by riding behind a train to reduce drag, would this approach work for human runners as well to break the elusive 30 mph threshold?
- Are Supermassive Blackholes eating galaxies orbiting them?
- Do different ethnicities have a better/worse chance of contracting certain diseases?
- If I were to go back in time with modern day smartphone, how far would I be able to go back and still get coverage?
- Is there such thing as hybridization involving the f orbital?
- Does refractive index vary with thin film thickness?
- how big would a telescope need to be to image the disk of proxima centauri b?
- Why is computer data actually "moved" when I move a file to a different folder? Why not use an index instead?
- Do males display symptoms from STDs/STIs differently than females?
- Why do panic attacks cause disorientation?
- Is there a way to use electromagnetism or another force to act on non ferrous metals or other materials?
- Since Potassium is a Alkali Metal, then how does our bodies use it in reactions effectively? What is preventing K+ from reacting with an undesired compound such as water?
- Why do tradition ICE cars benefit from multiple gears and EVs do not?
- Why does the ampersand symbol (&) sometimes incorrectly display as &?
- Can the body remove foreign objects lodged in the flesh on its own? If so, why does this sometimes not happen?
- How can a spinning T-handle sometime accelerate?
- With the current state of astronomy, what is the minimum likely warning of an Earth-asteroid impact with something similar in size to the Chicxulub impactor, which was roughly 10 km in diameter?
- What happens to neutron stars, pulsars, and other super dense objects after they've spent their energy? Can their material be reabsorbed into new stars, solar systems, or galaxies?
- How do GPS satellites cope with the millions of vehicles requesting their locations at once?
- What is the best voting system to decide where to eat with a group of friends?
| What's going on when I'm getting a "kink in my neck" after sleeping in an odd position? Posted: 28 Aug 2016 08:59 AM PDT I must have slept weird but I woke up with a kink in my neck. What happens that causes this? [link] [comments]  |
| On Saturday Juno flew to within 4,200km of Jupiter... but within 4,200 km of WHAT exactly? Posted: 28 Aug 2016 07:07 PM PDT When NASA says Juno flew within 4,200km of Jupiter, what are they measuring from? Another way to ask is: Juno approached within 4200km of WHAT exactly? My understanding is that Jupiter's atmosphere gradually transitions to liquid, with no solid "surface" - so it can't be the surface of the planet. I also assume that the edge of the atmosphere is fairly fuzzy between Jupiter and space - there is no solid line where the atmosphere "ends." [link] [comments]  |
| Posted: 29 Aug 2016 06:56 AM PDT |
| How big would proxima B look from the planets surface? Posted: 29 Aug 2016 07:19 AM PDT In relation how much more sky would be covered with the "orb" of sunlight? As in, would it look similar to our own sun's size, would it be brighter or dimmer , larger or smaller (due to the size and distance from planet surface) ? [link] [comments]  |
| Posted: 29 Aug 2016 07:15 AM PDT |
| Are Supermassive Blackholes eating galaxies orbiting them? Posted: 29 Aug 2016 08:11 AM PDT |
| Do different ethnicities have a better/worse chance of contracting certain diseases? Posted: 28 Aug 2016 04:11 PM PDT |
| Posted: 28 Aug 2016 07:47 PM PDT |
| Is there such thing as hybridization involving the f orbital? Posted: 28 Aug 2016 06:09 PM PDT Also, in molecular orbital theory diagrams, how come I never see d or f orbitals mixing to form the bonding and anti-bonding molecular orbitals? [link] [comments]  |
| Does refractive index vary with thin film thickness? Posted: 28 Aug 2016 08:58 PM PDT I plotted the refractive index as a function of wavelength for AZO thin films (deposited by magnetron sputtering) of varying thicknesses (46.5nm, 92.5nm, 271.5nm, 501.1nm, 827.1nm) and observed that the refractive index changes slightly with thickness. Shouldn't the refractive index remain a constant for all thicknesses of the same material at a particular wavelength? [link] [comments]  |
| how big would a telescope need to be to image the disk of proxima centauri b? Posted: 29 Aug 2016 08:22 AM PDT |
| Posted: 28 Aug 2016 05:40 PM PDT I just moved some videos on my phone to a new folder (also on my phone). It took several minutes to complete the move. If we used an index instead, the files wouldn't have to be moved, and "moving" files would take no time at all. There must be other reasons for actually re-writing the data to the same drive, so I'm wondering what those might be. [link] [comments]  |
| Do males display symptoms from STDs/STIs differently than females? Posted: 28 Aug 2016 09:36 PM PDT My SO and I slept together for the first time, and to make sure, she got tested. She came back positive for one, and advised me to get checked as well. She said her doctor said the same, saying something along the lines of males typically take a long time to display symptoms of an STI, if at all. Any truth? [link] [comments]  |
| Why do panic attacks cause disorientation? Posted: 28 Aug 2016 03:16 PM PDT So I've suffered panic attacks for over a decade and I'm kind of used to them but recently noticed there is one effect of panic that I don't understand the physiological basis for. When I get a panic attack or am under extreme stress, I get a strange delirious feeling like my proprioception is getting confused - for instance, it may feel like my head is floating above my body, or sometimes it feels like my arms are where my legs are and my legs are where my arms are, or sometimes it feels like I have no torso. It is like my mind 'forgets' where my body parts are and my internal model of them gets jumbled up. This stops, of course, if I look down at my body or touch something almost to 'remind' my brain where my body parts are, but if there is no reference point, they get mixed up and I get a bizarre feeling of disorientation. I assume this isn't actually useful in a crisis situation and is more of a byproduct of fight/flight? How does adrenaline work to cause disorientation of this kind? EDIT: I just double checked to make sure I had used the word proprioception correctly....still not sure I have...but while doing so discovered there has been some kind of link made between vestibular/proprioception difficulty and agoraphobia. If anyone can explain that link that would be really interesting - I have agoraphobia and also have a history of inner ear problems leading to perforated eardrums, difficulty balancing, and the habit of falling over if there isn't enough of a light source for me to orientate myself to (i.e. I think I over-use vision for balance) - all of which I had assumed was down to my history of ear problems. How the hell do these things link to agoraphobia? [link] [comments]  |
| Posted: 28 Aug 2016 06:26 PM PDT Like the title says, is there a way to apply a force to metals other than iron, nickel, and cobalt using a magnetic or electric field? If so, is there a way to make the field "selective" as in it applies to only one type of material? A hypothetical situation would be multiple types of metal mixed together on a conveyor. As each metal passes through its respective field it would either be attracted or repelled from the other materials to remove it from the mix. My thought process is using some form of frequency or other variance to cause only one material to react similar to how different filters act on the different colors of light due to wavelength . I'm not even sure if it's possible, just something that's been rolling around in my head enough to make me curious. [link] [comments]  |
| Posted: 28 Aug 2016 06:01 PM PDT I've noticed that a lot of times that Potassium ions are used to perform reactions with the body such as muscle movement in animals or opening and closing of the stomata in plants. For humans it is absorbed through ingestion and for plants, the roots; both of these are aqueous environments, something that potassium is regarded to be highly reactive to since it is an Alkali Metal. Is there a type of transport protein that aids in the movement or perhaps because it is an ion that it is able to be controlled, or is it an entirely different answer all together? I would like to hear your thoughts. Regards, A Confused High School Student [link] [comments]  |
| Why do tradition ICE cars benefit from multiple gears and EVs do not? Posted: 29 Aug 2016 05:34 AM PDT Hello, I've been trying to look this up online and haven't been finding much, so I'll expand on my question. When looking at any available EV that I know of (leaf, tesla, bmw i3, etc) none of them have any kind of gear system for higher speeds. I drive a 2013 Nissan Altima for example and its most efficient speed seems to be between 65-70 mph (with a CVT transmission). A tesla's most efficient speed is around 45 mph. Why wouldn't giving it a second gear around 45 mph make it more efficient at a higher speed? The only thing I can think of is that electric motors have very little friction to make higher RPMs worse and that as you increase the RPMs on an ICE engine you get a proportional increase in piston firings, burning more fuel. Is there anything else to it? Why wouldn't giving a tesla a second gear more mileage at higher speeds? Do electric cars lose mileage at higher speeds mostly from greater wind resistance? I'm asking because range for EVs is one of the biggest problems right now, and if a tesla model S gets 465 miles to a charge at 45 mph, wouldn't a second gear drastically increase the 265 mile range at 70mph? [link] [comments]  |
| Why does the ampersand symbol (&) sometimes incorrectly display as &? Posted: 28 Aug 2016 04:27 PM PDT |
| Posted: 28 Aug 2016 09:31 PM PDT For example, a piece of pencil graphite or a splinter that stays in you for a number of years. [link] [comments]  |
| How can a spinning T-handle sometime accelerate? Posted: 29 Aug 2016 05:00 AM PDT The second attempt (not the first or third) made in this video by an astronaut to spin a T-handle in zero gravity results in what appears to be an increasing linear acceleration. There appears to be a slight wobble syncing up with the flips of the T-handle but isn't it forbidden to have acceleration in this scenario? Is it an initial push slowly being released? Something else? [link] [comments]  |
| Posted: 28 Aug 2016 12:36 PM PDT I would assume that the likely worst case scenario would be on a very long period, highly elliptic orbit, that is roughly on the same plane as everything else in the solar system. [link] [comments]  |
| Posted: 28 Aug 2016 09:23 AM PDT Considering how dense objects like neutron stars are, what happens to them after they die? Are they broken apart, exploded, absorbed into new objects, or something else? [link] [comments]  |
| How do GPS satellites cope with the millions of vehicles requesting their locations at once? Posted: 28 Aug 2016 11:24 AM PDT I presume there are loads of GPS satellites that triangulate the position of vehicles with satnavs etc. but are there computers onboard these satellites and how do they relay all that information at once to the right vehicle? [link] [comments]  |
| What is the best voting system to decide where to eat with a group of friends? Posted: 28 Aug 2016 09:39 AM PDT Me and some friends meet up regularly for eating and trying out different restaurants. It's a lot of fun, but lately we've been finding it difficult to find a suitable compromise to satisfy everyones tastes. That got me thinking about consensus in small groups like ours and ultimately lead to my question: If we were voting on where to eat next, how should the voting process (or system) look like? I'm not very familiar with the field, and so far the best I've found is Instant-runoff voting. I'm still wondering if there might be a better one among the ones listed on wikipedia that I've failed to recognize. [link] [comments]  |
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