Ligo gravitational observatory and nuclear bombs? |
- Ligo gravitational observatory and nuclear bombs?
- Can Negative Mass exist?
- Can anyone give a comprehensive explanation of sunglass lenses?
- The false vacuum theory and energy levels of fields?
- Do people in wheelchairs suffer from deep vein thrombosis more often than other people?
- With how many drops of water could you mix a single drop of blood and still be able to determine the DNA of the blood sample?
- Since Gravitationa waves travel at the speed of light, and the speed light is affected by it's medium. Is Gravitation affected by the medium of which it acts?
- Can electromagnetic waves be represented as real numbers? If so, does this mean we have infinite frequencies?
- What is the difference between read-only and re-writable CDs?
- Can gut bacteria really make humans crave certain unhealthy foods?
- Fluid dynamics question -- Why does a water nozzle repel with less force as I move an object closer to it?
- What do people mean when they say that EM waves are perpendicular electric and magnetic waves?
- In intrinsic (or pure) semi-conductors what happens to electrons that are liberated by energy?
- Do dogs have object permanence? If not, is there any way it can be taught to them?
- Why are the solutions of second order differential equations added to give a single solution?
- Why does it seem like a lot of popular treatments for PTSD (CBT, Psychotherapy, EMDR) have such limited benefit? Why do we use them if we know they don't have a high likelihood of making a big long term difference?
- How does second-hand smoke affect the development of a child? How does it differ from first-hand use in terms of effects and ability for busy to recover?
- How exactly does our brain remember faces of others and associate that to the people they belong to? Is there a "compartment" where these sort of records are stored?
| Ligo gravitational observatory and nuclear bombs? Posted: 18 Apr 2017 04:19 AM PDT Could a nuclear bomb trigger ligo? Would we know what it was? [link] [comments]  |
| Posted: 17 Apr 2017 05:34 PM PDT Some of you might know that according to the news, some fellas have been able to successfully create a liquid with atoms that accelerate as if they had Negative Mass (backwards instead of forwards). I'm no physicist but even I know the mind boggling weight that such a discovery carries and that the very Second Law of Newton just gets thrown out the window in this circumstance. So does such a breakthrough add evidence that Negative Mass can exist? [link] [comments]  |
| Can anyone give a comprehensive explanation of sunglass lenses? Posted: 17 Apr 2017 07:24 PM PDT Reading up on sunglasses is confusing as heck, especially for anyone hoping to save a bit of money. There's a lot of science here, and I'm having a lot of trouble finding a proper comprehensive rundown of everything that's involved, and what it all winds up meaning for consumers. First you need to decide wether you want CR-39, Polycarbonate, Trivex, or Glass lenses. Does it even matter? Well, it might. If you're buying cheap and the glasses don't come with much (or any) reliable info, at least you'll know they're relatively UV resistant if they're Polycarbonate or Trivex, because that's a natural quality of those two solutions. Even still, they're not naturally UV400 compliant, so additional treatment/layers/coatings are needed to achieve that. Speaking of which, what the heck is UV400 and how does it differ from the other standards? Which is best? How much does it matter if you get a pair of sunglasses that doesn't explicitly comply. Are there various levels of compliance? What about how UV and Polarization are even achieved? There are different methods, but what are they, and which are the most effective/desirable? Again, how much does it really matter? I know if it's a coating that easily wears off, that's bad, but how common is that? I've read that some Polarization is incorporated right into the lens itself, some are layered into the middle of the lense between sheets of glass, and some are just a film that's applied to the outside. What are the differences? There's no Polarization standard as far as I know, so how do you know what you're getting? Which is best? I've heard lens clarity and uniformity can be a big deal, but aren't always easily perceptible. I've heard ones with lower clarity/uniformity can stress eyes and eventually cause notable eye problems. Is that accurate? How does one identify good lenses in this regard? I'm sure I'm missing quite a bit, but I hope someone who knows more about this topic can give a lot more information. Thanks! [link] [comments]  |
| The false vacuum theory and energy levels of fields? Posted: 17 Apr 2017 05:39 PM PDT So I have been reading a little bit about the false vacuum theory and am a little confused. From what I have read, the theory states that some mathematics suggests that the Higgs field is not in its ground state energy level and if something were to bump it out of the current stable state that it is in, it could fall to its ground state energy level and that would bring about all sorts of havok. My question is this: Do fields, like the Higgs field, have actual ENERGY states? Much like an electron has discrete energy states in an atom and prefers to be in its ground state. The idea of a field having an energy level is confusing to me. I feel like it would not be an "energy level" like the energy levels of electrons that I am fairly familiar with. EDIT: Spelled Vacuum wrong in the title... [link] [comments]  |
| Do people in wheelchairs suffer from deep vein thrombosis more often than other people? Posted: 17 Apr 2017 05:20 PM PDT |
| Posted: 18 Apr 2017 05:08 AM PDT |
| Posted: 18 Apr 2017 04:28 AM PDT Also can gravitation be "blocked" by black hole singularites or any other extraordinary stellar object? [link] [comments]  |
| Posted: 17 Apr 2017 07:34 PM PDT After posting an article about the selling of radio waves used by TV stations to some of the top mobile and internet-based providers, it got me to thinking. Can radio frequencies be mathematically represented as "real numbers" as in PI for example. If the above is true, does this mean frequencies are infinite; so why can we not develop hardware that can be fine tuned to any frequency so that there are infinite amounts of frequencies for anyone to use? That way it will not interfere with government / emergency regulated frequencies. [link] [comments]  |
| What is the difference between read-only and re-writable CDs? Posted: 18 Apr 2017 03:49 AM PDT What specifically determines if a disk is re-writable or not? Is it a physical characteristic, or software contained on the disk? [link] [comments]  |
| Can gut bacteria really make humans crave certain unhealthy foods? Posted: 17 Apr 2017 10:43 PM PDT |
| Posted: 18 Apr 2017 02:27 AM PDT Wasn't sure exactly how to phrase the title, and hopefully this is the right sub. Many swimming pools have those nozzles in the side walls that shoot out a constant stream of water, often quite powerfully. Of course, if I place my hand in front of such a nozzle, my hand is pushed away. However, I've noticed that if I get my hand close enough to the nozzle (within a centimeter or so), the force pushing my hand away suddenly decreases. The flow also seems to transition from turbulent to more or less laminar (not sure if that's the right term). Hopefully my lovely MS Paint drawing helps demonstrate the phenomenon. I've also found that this occurs when blowing on a piece of paper. If the paper is several inches away, the force is as you'd expect. But if you move the paper very close to your lips, it almost seems to 'stick' to your lips with relative ease, even while blowing with the same strength. I'm sure this phenomenon is well known, I'm just curious what it is and why it occurs. I have a couple guesses... The first is that it has to do with the direction of flow. When the object in question is far away from the nozzle, the fluid gains a velocity in a direction perpendicular to the object, and the object forces the fluid to significantly change velocity, thus a force is imposed upon the fluid and the object. When the object is closer to the nozzle, the fluid never gains that velocity perpendicular to the object in the first place (but that doesn't make much sense, because it's still flowing perpendicular to the object before it exits the nozzle). My other guess is that it relates to Bernoulli's principle. Specifically, once the object is close enough to the nozzle, the fluid is forced to accelerate to a high enough speed (travelling along the object's surface) that Bernoulli's principle lowers the pressure of the fluid a fair amount. The second one seems to make much more sense to me. [link] [comments]  |
| What do people mean when they say that EM waves are perpendicular electric and magnetic waves? Posted: 17 Apr 2017 10:39 PM PDT I am a bit confused on how EM radiation works. What does it mean that photon's waves are both electric and magnetic? Why are these fields perpendicular? How are they both at the same time? How does this relate to things like magnets and electricity that powers my house? Also, how does a photon act as a wave? How exactly is it oscillating? [link] [comments]  |
| In intrinsic (or pure) semi-conductors what happens to electrons that are liberated by energy? Posted: 18 Apr 2017 12:38 AM PDT |
| Do dogs have object permanence? If not, is there any way it can be taught to them? Posted: 17 Apr 2017 05:11 PM PDT |
| Why are the solutions of second order differential equations added to give a single solution? Posted: 17 Apr 2017 12:19 PM PDT If you solve the differential equation's auxiliary function and two real roots, a and b, are obtained why are the solutions added as the auxiliary function is found by using y=Aemx not y=Aeax+Bebx [link] [comments]  |
| Posted: 17 Apr 2017 04:53 PM PDT I have read that CBT helps some people but is less helpful when there are comorbid issues (PTSD and depression and anxiety etc.) and that EMDR is helpful when there is one traumatic incident but not for Complex PTSD where there is ongoing trauma for example child abuse. Why do we use these methods if they have such limited success? Why not just use psychological drugs straight away? (As long as there aren't complications like side effects etc.) [link] [comments]  |
| Posted: 17 Apr 2017 04:08 PM PDT I grew up in a household with an indoor-smoking parent from approximately 1 years old to when I was about 12. In my twenties now. I'm curious about how much this second-hand exposure affected my development and wondering how much recovery is possible after exposure has ceased. I read the answer for smoking at https://www.reddit.com/r/askscience/comments/177ib0/what_happens_to_the_deposit_of_tar_and_other/ but an specifically asking about child development and second-hand smoke. Is it ever possible to recover completely? I'm also interested in contrasting how second-hand exposure differs from first-hand use in terms of bodily effects and in terms of possible recovery. [link] [comments]  |
| Posted: 17 Apr 2017 07:11 PM PDT |
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