Do hydrogen isotopes affect chemical structure of complex hydrocarbons?

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• Do hydrogen isotopes affect chemical structure of complex hydrocarbons?
• How far can a big passenger aircraft (for instance an Airbus A340) glide after catastrophic engin failure?
• Is there a difference in suicide rates between people who have already had children and those who haven't?
• Why do electrons have a constant mass?
• Why don’t we use salt water for toilet water? Wouldn’t it save millions of gallons of freshwater?
• If you drop something on a solid, does it ripple like a liquid would except much less noticeably?
• Why do some trees leaves turn red some yellow and some orange and if a tree is red this year then is it always red or can it be yellow next year?
• How do we calculate the exhaust speed of ions in a Hall-effect thruster ?
• Can there be anything higher than a pH of 14 or lower than a pH of 0?
• How can we prove that earth is rotating?
• Why are sloths so slow?
• Why is Ruthenium's electron configuration [Kr] 5s1 4d7?
• Is the low dosage of cosmic background radiation we are constatly exposed to a driver of evolution?
• Will sterilisation with gamma rays not make the product radioactive or destroy the product?
• Human fetal development: When does the uterus start to form?
• The impact of canals in a city?
• How do tree rings form?
• Does a flashing LED light use less electricity than a steady light? Would a light on a 1/2 second on/off flash use half the electricity?
• Can deaf people get tinnitus?
• Do you burn more calories when cold compared to when you are warm when doing the same activity?
• What factors lead to the Wisconsin glaciation?
• How do the switching mechanisms in transistors work, and how are they triggered?
• Why does absence of blood flow cause cell death?
• Concerning the photoelectric effect, if an electron's energy is nearly proportional to the frequency of the incident photons, why don't solar panels work on cloudy days? Doesn't UV light, which is higher energy than visible and infrared, pass through clouds?

Do hydrogen isotopes affect chemical structure of complex hydrocarbons? Posted: 22 Oct 2017 06:10 AM PDT Hello! I am wondering if doubling/tripling of the mass of hydrogen in complex hydrocarbons has a chance of affecting its structure, and consequently, its reactability. Furthermore, what happens when a tritium isotope decays in a hydrocarbon to the hydrocarbon? Finally, as cause for this whole question, would tritiated ethanol behave any differently to normal ethanol? submitted by /u/Hoihe [link] [comments]

How far can a big passenger aircraft (for instance an Airbus A340) glide after catastrophic engin failure? Posted: 22 Oct 2017 03:03 AM PDT I imagine "not far" being the tl;dr, but I was wondering how would it look from the ground? If loaded close to capacity, would it look little like a rock falling from the sky? submitted by /u/docsleepy [link] [comments]

Is there a difference in suicide rates between people who have already had children and those who haven't? Posted: 21 Oct 2017 09:20 PM PDT Because on one hand, having children fulfills our biological goal so I'd imagine there would be less incentive to stick around if things came to that, but on the other hand there could be increased incentive to stick around to care for and protect the kids. Is there any discrepancy between the groups that becomes apparent on a large scale? submitted by /u/AbsolutelySwedish [link] [comments]

Why do electrons have a constant mass? Posted: 21 Oct 2017 11:28 PM PDT So as far as I understand, electrons can gain and lose a quantifiable amount of energy in the form of photons. Because photons have energy, they must have mass because having a zero mass would result in energy being zero due to E=mc2. However, this implies that electrons in higher energy orbitals would have more mass than those in lower orbitals because they have either absorbed or emitted energy in the form of photons. What equalizes the mass of the electron for the photon being either lost or gained? Also, if an electron is gaining/losing mass as photons are emitted and released, where is the charge of the electron stored? The photon isn't a charged particle/wave/whatever it is, so the electron isn't losing or gaining charge despite losing mass. Sorry for the lengthy question! submitted by /u/Malsirhc [link] [comments]

Why don’t we use salt water for toilet water? Wouldn’t it save millions of gallons of freshwater? Posted: 21 Oct 2017 07:23 AM PDT submitted by /u/MoleyAndHoley [link] [comments]

If you drop something on a solid, does it ripple like a liquid would except much less noticeably? Posted: 21 Oct 2017 01:01 PM PDT I thought of this when I was dropping some objects into sand, the sand would shift outwards kind of like a ripple. submitted by /u/XH192 [link] [comments]

Why do some trees leaves turn red some yellow and some orange and if a tree is red this year then is it always red or can it be yellow next year? Posted: 21 Oct 2017 08:43 PM PDT submitted by /u/lobstah1 [link] [comments]

How do we calculate the exhaust speed of ions in a Hall-effect thruster ? Posted: 22 Oct 2017 07:03 AM PDT submitted by /u/zenef [link] [comments]

Can there be anything higher than a pH of 14 or lower than a pH of 0? Posted: 21 Oct 2017 08:26 AM PDT submitted by /u/Sebfofun [link] [comments]

How can we prove that earth is rotating? Posted: 22 Oct 2017 03:13 AM PDT Aside from the Foucault pendulum, how can we prove that earth is rotating? My friend showed me a video of a gyroscope which keeps its position by hours. I thought a gyroscope keeps its horizon no matter what, but with a rotating earth, it should have been seen as tilting after a couple hours. Am I not right? Do I miss something here? Is there an another way of proving that earth is rotating and round physically? (Without the satellite images etc.) submitted by /u/contruiga [link] [comments]

Why are sloths so slow? Posted: 21 Oct 2017 12:01 PM PDT submitted by /u/That1V1k1ng [link] [comments]

Why is Ruthenium's electron configuration [Kr] 5s1 4d7? Posted: 21 Oct 2017 08:28 PM PDT Why is it more favourable than [Kr] 5s2 4d6? Also what would the electron configuration for Ru 4+ look like? submitted by /u/ItsnotEasyman [link] [comments]

Is the low dosage of cosmic background radiation we are constatly exposed to a driver of evolution? Posted: 21 Oct 2017 08:25 PM PDT submitted by /u/Higher_Primate01 [link] [comments]

Will sterilisation with gamma rays not make the product radioactive or destroy the product? Posted: 21 Oct 2017 09:59 AM PDT I was told yesterday that sometimes drugs are sterilised using gamma rays because some drugs can't handle being heated. Then he added that it's also used for food!? Is there not a risk of the drug, food or packaging becoming radioactive? Or will the rays not alter the drug or the food? I am also wondering if this done in very controlled facilities? But he said it was very common, but I thought it would be too expensive!? submitted by /u/DiegoRez [link] [comments]

Human fetal development: When does the uterus start to form? Posted: 21 Oct 2017 02:11 PM PDT I know why men have nipples, and why some men have supernumerary nipples. I know that the ovaries and the testicles started off as the same primitive structure. I know that the same erectile tissue and urethra in women combine to become the penis in men. Is there an equivalent structure to the uterus in male bodies? Or does it not start forming until later, after sexual differentiation has begun? Or does it vanish, like nipples in male mice? Are there many anatomical features that don't have an equivalent between men and women? submitted by /u/raendrop [link] [comments]

The impact of canals in a city? Posted: 21 Oct 2017 11:33 AM PDT A lot of cities in The Netherlands have canals. Example Once used mainly as a water highway for goods, now they're obviously less functional in that department. So other than aesthetics, what consequences/benefits does this have in a city? Nature wise? Health wise? Temperature regulation? Etc.. Would there be a good reason for 'new' cities to incorporate canals/waterways like this in their design? (If costs wasn't an obvious limiting factor) Or is the impact of canals relatively low otherwise? submitted by /u/AlbertLooper [link] [comments]

How do tree rings form? Posted: 21 Oct 2017 08:29 AM PDT submitted by /u/Joshsed11 [link] [comments]

Does a flashing LED light use less electricity than a steady light? Would a light on a 1/2 second on/off flash use half the electricity? Posted: 21 Oct 2017 09:45 AM PDT submitted by /u/NerdMachine [link] [comments]

Can deaf people get tinnitus? Posted: 21 Oct 2017 10:01 AM PDT submitted by /u/throwawaybreaks [link] [comments]

Do you burn more calories when cold compared to when you are warm when doing the same activity? Posted: 21 Oct 2017 09:29 AM PDT When sitting down for example, would my body use more energy and burn more calories in the cold than it would when I was warm or would there be minimal to no overall difference? submitted by /u/ckoppula199 [link] [comments]

What factors lead to the Wisconsin glaciation? Posted: 21 Oct 2017 08:53 PM PDT submitted by /u/Bobithie [link] [comments]

How do the switching mechanisms in transistors work, and how are they triggered? Posted: 21 Oct 2017 08:55 AM PDT I've been wondering for a while how the flow of electrons in a transistor was switched from one direction to the other. How does the software running on the OS interact with the hardware to manipulate the movement of electrons? submitted by /u/afrench53198 [link] [comments]

Why does absence of blood flow cause cell death? Posted: 21 Oct 2017 08:41 PM PDT Why don't the cells just stop working until blood flow full of nutrients and oxygen is restored (suspended animation if you will)? submitted by /u/ravupadh [link] [comments]

Concerning the photoelectric effect, if an electron's energy is nearly proportional to the frequency of the incident photons, why don't solar panels work on cloudy days? Doesn't UV light, which is higher energy than visible and infrared, pass through clouds? Posted: 21 Oct 2017 09:09 AM PDT Or don't current solar panels currently work with UV light? And is there any progress towards engineering solar panels that can work efficiently in the UV range? submitted by /u/arzthaus [link] [comments]

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How do audio books, printed books, and videos differ in terms of how our brains retain and process the information?

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• How do audio books, printed books, and videos differ in terms of how our brains retain and process the information?
• How much of a person's height is determined by DNA and how much is determined thru health and diet while an adolescent?
• My physics tutor said that we are now able to change the wavelength of an already emitted laser beam. How is this possible?
• How do we know how much a planet weights/the mass of the planet, without knowing exactly what it is made of?
• Do women who no longer have periods via birth control still experience the same hormonal cycle?
• How can a program/game (e.g. Destiny 2) prevent overlays?
• Why is the benchmark for fevers 37.5 degree celsius?
• I know a catalyst works by lowering the activation energy but how does it do that?
• Why do humans have certain hair colors (i.e. yellow, red, black, brown, white) but not others (green, blue, purple, etc). Would it be theoretically possible to manipulate our genes to produce any hair color?
• What variables make some viruses deadlier than others?
• [Physics] How can Chernobyl be used?
• Why do your muscles get sore after working out?
• Why can't we move our eyes independently?
• Why does garbage bunch up in the ocean?
• What is special about the Ovum, amongst cells, that allows it to survive so long?
• In regards to underwater plant life, what happens to the oxygen produced through their photosynthetic process? Why don't we see bubbles on these plants?
• Do photons have any appreciable impact on spacecraft outside the atmosphere?
• By how much does water at depth get compressed?
• How well can we see the surface of a distant planet?
• Are Wind systems affected by continents?
• Is there a mechanism for a neuron delaying its action potential?

How do audio books, printed books, and videos differ in terms of how our brains retain and process the information? Posted: 20 Oct 2017 01:28 PM PDT If I read a book compared to listening to it.. how does that affect my brain differently? Is there any difference? submitted by /u/thirdworldsociety [link] [comments]

How much of a person's height is determined by DNA and how much is determined thru health and diet while an adolescent? Posted: 21 Oct 2017 07:41 AM PDT submitted by /u/Reciproc1ty [link] [comments]

My physics tutor said that we are now able to change the wavelength of an already emitted laser beam. How is this possible? Posted: 21 Oct 2017 12:38 AM PDT He told me about the TOPAS system, which can apparently accomplish this. But he does not really know how the system does it. Would anyone here happen to know? Thanks. submitted by /u/zhrmghg [link] [comments]

How do we know how much a planet weights/the mass of the planet, without knowing exactly what it is made of? Posted: 21 Oct 2017 04:02 AM PDT submitted by /u/Ammesamme [link] [comments]

Do women who no longer have periods via birth control still experience the same hormonal cycle? Posted: 20 Oct 2017 08:58 PM PDT How much does the hormone cycle change when you disallow the body from menstruating? Would a woman experience the same psychoactive symptoms of a period like emotional sensitivity without menstruating? submitted by /u/Lillithia [link] [comments]

How can a program/game (e.g. Destiny 2) prevent overlays? Posted: 20 Oct 2017 05:19 PM PDT Bungie claims that 3rd party overlays like Discord, Mumble, and Fraps won't work in Destiny 2 because it resists attempts to inject code (https://www.bungie.net/en/Help/Article/46101). They also claim that OBS also won't work in fullscreen. How do these programs inject their own code to create overlays? Is it just by modifying memory? What techniques might Bungie be using to prevent these "hijackings"? Why is fullscreen video capture in software affected? submitted by /u/kayson [link] [comments]

Why is the benchmark for fevers 37.5 degree celsius? Posted: 20 Oct 2017 06:49 PM PDT Typically, a fever of above 37.5 degrees is considered a red flag. Is this experimentally derived, or merely arbitrary? Is there anything that prevents another number from being the standard? submitted by /u/Shugoii [link] [comments]

I know a catalyst works by lowering the activation energy but how does it do that? Posted: 21 Oct 2017 05:02 AM PDT submitted by /u/OsuSkinFinder [link] [comments]

Why do humans have certain hair colors (i.e. yellow, red, black, brown, white) but not others (green, blue, purple, etc). Would it be theoretically possible to manipulate our genes to produce any hair color? Posted: 20 Oct 2017 02:52 PM PDT submitted by /u/codelaser [link] [comments]

What variables make some viruses deadlier than others? Posted: 20 Oct 2017 07:02 PM PDT submitted by /u/2soku [link] [comments]

[Physics] How can Chernobyl be used? Posted: 20 Oct 2017 10:45 PM PDT I know they're in the process of decommissioning the last running reactors but how is it after 1986, the other reactors still ran? Aren't they dangerously close to reactor 4? Follow up, what is a RBMK(?) reactor vs what we have now and why is it flawed? submitted by /u/Jaeger39 [link] [comments]

Why do your muscles get sore after working out? Posted: 20 Oct 2017 08:03 PM PDT submitted by /u/fusionx_18 [link] [comments]

Why can't we move our eyes independently? Posted: 20 Oct 2017 11:26 AM PDT submitted by /u/soliperic [link] [comments]

Why does garbage bunch up in the ocean? Posted: 20 Oct 2017 02:27 PM PDT I know that it collects together because of currents but why doesn't it wind up drifting apart? submitted by /u/ScumbagsRme [link] [comments]

What is special about the Ovum, amongst cells, that allows it to survive so long? Posted: 20 Oct 2017 12:38 PM PDT submitted by /u/the-real-apelord [link] [comments]

In regards to underwater plant life, what happens to the oxygen produced through their photosynthetic process? Why don't we see bubbles on these plants? Posted: 20 Oct 2017 09:05 PM PDT submitted by /u/bisexualemonjuice [link] [comments]

Do photons have any appreciable impact on spacecraft outside the atmosphere? Posted: 20 Oct 2017 09:24 AM PDT I know that photons can be used in solar sails, and that they are technically able to propel objects, albeit very slowly. But is there any consideration for photons as they relate to, say, the ISS or some other vessel in outer space? Are there any adjustments made to flight trajectories due to photons over long periods of time? submitted by /u/WithMyxomatosis [link] [comments]

By how much does water at depth get compressed? Posted: 20 Oct 2017 01:31 PM PDT I read that deep water is more dense due to compression from weight above it, but liquids are incompressible; how is it possible? How negligible or significant is the change? submitted by /u/junoons [link] [comments]

How well can we see the surface of a distant planet? Posted: 20 Oct 2017 12:31 PM PDT I imagine closer planets like mars are much easier to see with a telescope, but what about planets in distant star systems? How sure can we be without going there ourselves what kind of planet it is, or what resources it has, or if it could have or even has life- in plant, bacterial, or animal form? submitted by /u/DrCorian [link] [comments]

Are Wind systems affected by continents? Posted: 20 Oct 2017 09:23 PM PDT If I were to change the shape and placement of continents, would this affect our current wind systems? submitted by /u/KoolKoffeeKlub [link] [comments]

Is there a mechanism for a neuron delaying its action potential? Posted: 20 Oct 2017 03:44 PM PDT I suppose this question has two parts: First, when a neuron is summing the signals from other neurons, can it speed up or slow down the summation process (eg, sum over a longer period of time)? Is this variable something that is regulated by the neuron (ie can change in response to use)? Second, once a neuron has reached its threshold potential, is there a way it can slow down or increase the action potential propagation speed? Is this also something that is controlled and changed dynamically? submitted by /u/Prosaic_Reformation [link] [comments]

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Do you use muscles to open or close your eyes?

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• Do you use muscles to open or close your eyes?
• Why doesn't the color of Jupiter's atmosphere homogenize?
• How do we decide if a population is indigenous?
• If alpha particles are bosons, do they "violate" the Pauli exclusion principle?
• Would you consider the theory of an abiogenic origin of petroleum a pseudoscience?
• What technology or methods are there to transform infertile soil (salted especially) into fertile soil?
• How sure are we that Type 1a supernovas are 'standard candles'?
• How strong a magnet would you need to remove the iron from a vial of blood?
• Isn't classical conditioning of animals basic "If this then that" reasoning? Doesn't this mean that cats/dogs could think?
• Does altitude affect a person's growth?
• Why do viruses like Zika that thrive inside a human host cause birth defects in offspring?
• Do planetary gravitational calculations assume an infinitely small point in space, or take into account the size and distribution of the mass of the planet?
• Are all the domains of all real functions an element of the set of real numbers?
• What is the AI advancement made by the new AlphaGo Zero algorithm over previous machine learning techniques?
• How do they determine which strains of flu viruses are included in the seasonal vaccine?
• If the sense of smell is usually associated closely with memory, what happens with memory recall/association in someone who was born without it?
• Can people with a cochlear implant hear the direction a sound is coming from?
• Why do we need to take flu shots every year, don't we already have anti-bodies for the flu virus?
• Why do we need sleep?
• What makes something indigestible?
• Why is there still sunlight after the sun set?
• What's the reason for a red turn arrow?

Do you use muscles to open or close your eyes? Posted: 19 Oct 2017 07:20 PM PDT What I mean is, when you're sleeping are you using muscle to close your eyes, or are you using muscle to open them during the day? submitted by /u/weaped [link] [comments]

Why doesn't the color of Jupiter's atmosphere homogenize? Posted: 19 Oct 2017 06:27 PM PDT Relevant to other planets too, but Jupiter seems like a good example. With all the turbulence in the atmosphere, surely it should have all mixed up and become fairly homogeneous by now, but instead we see distinct color bands. Sup wit dat? submitted by /u/allegory_corey [link] [comments]

How do we decide if a population is indigenous? Posted: 19 Oct 2017 08:39 AM PDT How long do they have to have lived in a place? Or do they have to be be first group that showed up? Edit: now I think I have even more questions. Or at least the term seems even more vague than I had thought previously. Based on these definitions you have to not advance technologically to be indigenous? Let's say we pick an area like Japan who of any group fits the definition? submitted by /u/raznog [link] [comments]

If alpha particles are bosons, do they "violate" the Pauli exclusion principle? Posted: 20 Oct 2017 04:23 AM PDT I am sorry for the long text, but I was wondering about a few different things: The Pauli exclusion principle states that no two identical Fermions can occupy the same quantum state simultaneously, but if He4 is technically a boson, can two He4 nuclei occupy the same quantum state simultaneously? My first guess would be no, since the quarks forming the protons and neutrons in the nucleus are Fermions themselves, but is that necessarily the case? According to the Wikipedia page, a 1D Bose gas with a particularly defined interaction function (V(r) = inf*delta(r) , an infinite amplitude Dirac, which is pretty unphysical) does obey it, but what if we're considering 2 nuclei in 3D with an arbitrary interaction potential? As an aside, since its constituent particles are considered indistinguishable, could we also say that two He4 are indistinguishable? Any help would be greatly appreciated :) submitted by /u/Zambeezi [link] [comments]

Would you consider the theory of an abiogenic origin of petroleum a pseudoscience? Posted: 20 Oct 2017 12:01 AM PDT What is the border between pseudo and "real" science? submitted by /u/groovyd1 [link] [comments]

What technology or methods are there to transform infertile soil (salted especially) into fertile soil? Posted: 19 Oct 2017 05:04 PM PDT I am reading about project Atlantropa and was intrigued that the freed land would be used for agriculture. submitted by /u/znihilist [link] [comments]

How sure are we that Type 1a supernovas are 'standard candles'? Posted: 19 Oct 2017 10:02 AM PDT This article on space.com indicates that there's some growing discrepancy between the Hubble Constant as measured using cosmic distances and the Hubble Constant as measured using the CMB. They talk about the Chandrasekar limit and how it produces Type 1a supernovas of approximately equal illumination, allowing us to use them as 'standard candles' for measuring those cosmic distances. Could this situation be resolved by introducing some sort of "error" into the Type 1a supernova brightness? In other words, does the problem go away if the brightness (and therefore distance) is not assumed to be X, but X +/- 10%? If so, are there candidates for that sort of error? submitted by /u/best_of_badgers [link] [comments]

How strong a magnet would you need to remove the iron from a vial of blood? Posted: 19 Oct 2017 05:47 PM PDT I was doing blood work today and I know blood has iron in it, so how strong a magnet would you need to remove the blood from a vial? I know MRIs don't kill people so it would have to be much stronger then that, right? submitted by /u/redpandamage [link] [comments]

Isn't classical conditioning of animals basic "If this then that" reasoning? Doesn't this mean that cats/dogs could think? Posted: 19 Oct 2017 02:11 PM PDT submitted by /u/squarus [link] [comments]

Does altitude affect a person's growth? Posted: 19 Oct 2017 06:35 AM PDT Let's say identical twins were split up at birth. One lived at sea level and the other lived 5000m above sea level. The lifestyles they lived were the exact same all the way until adulthood. When they finally reached adulthood, would they be different heights due to atmospheric pressure? submitted by /u/nosmartfriends [link] [comments]

Why do viruses like Zika that thrive inside a human host cause birth defects in offspring? Posted: 19 Oct 2017 07:54 PM PDT Along with that are the birth defects evolutionarily advantageous when it seems to limit chances of survivial for the viruses? submitted by /u/TheAntiochStallion [link] [comments]

Do planetary gravitational calculations assume an infinitely small point in space, or take into account the size and distribution of the mass of the planet? Posted: 19 Oct 2017 06:58 AM PDT So I have little to no science background, beyond what I have picked up from wikipedia articles related to Episodes of stargate and too many hours reading and thinking about why I crash my ships in Kerbal Space Program. With that being said, how are the gravitational effects of a body, such as a planet or sun, calculated in relation to its size? I'm thinking that for a relatively small dense body, calculating its effect on another body at a relatively great distance would be a matter of calculating the effects of an infinitely small point with equal mass to the actal planet, with the same center of gravity. As if all of the mass of the planet were focused in a single mathematical coordinate in space, rather than distributed over several thousand miles of diameter. This seems like a simple equation, that the force between the 2 bodies would be calculated by their mass and distance, regardless of their respective size. How does this change for objects that are very close together? for example, calculating the pull of gravity of a person standing on its surface? From that distance, the distributiong of mass seems more significant, as it is not all focused in some far off single point, but distributed essentially on a plane that stretches out in every direction from the point where the person is standing, not just directly downward towards the center of the planet. Does that just get insanely complicated and a best estimate is used? Where this could get even more interesting would be calculating the influence of 2 very large, very dense bodies with no atmosphere passing extremely close to each other in space. Like 2 massive planets moving so quickly that they pass each other within a handful of miles without colliding. If the shape of each planet was irregular, it seems the gravitational interaction of various parts of the planet and the distribution of their mass would be crucial to understanding how their respective courses would change after passing. I imagine it would go far beyond the video game approximation of a planete, which would essentially be a massless solid sphere with an infinitely small center of gravity containing all of its mass, so the force of gravity just pulls directly to the core, no matter the distance to the surface. Another thought: how would this change the effect of gravity beneath the surface of the planet? If one were to theoretically dig a hole to the center of the earth, there would be no gravity felt except that of the sun and moon, correct? The planet's gravity would be pulling you equally in all directions from that point, essentially negating itself. Am I thinking of this right? edit: TLDR: In gravitational calculations, are planets big or small? submitted by /u/imagreatlistener [link] [comments]

Are all the domains of all real functions an element of the set of real numbers? Posted: 19 Oct 2017 04:55 PM PDT With every REAL function I can think of, all its inputs are an element of the set of real numbers. Can one imply that all domains are elements of the set of real numbers? submitted by /u/4w350m3guY [link] [comments]

What is the AI advancement made by the new AlphaGo Zero algorithm over previous machine learning techniques? Posted: 19 Oct 2017 07:28 PM PDT submitted by /u/inexion [link] [comments]

How do they determine which strains of flu viruses are included in the seasonal vaccine? Posted: 19 Oct 2017 08:06 AM PDT Hi AskScience! They are offering the seasonal vaccine here at my workplace today, and I noticed in the fine print it covers 3 strains. How are the specific strains chosen? I had a few theories backed up by a reasonable rationale in my mind, and I wanna see how close I am to the real answer. 1. The most infectious, most easily spread strains are prioritized. Since infectiousness would most directly correlate to maximum loss of productivity across the board, it would make sense for these strains to be vaccinated against. Also, since those with compromised immune systems are more likely to come into contact with highly infectious strains, vaccinating against these strains would provide a herd immunity to protect the vulnerable. 2. The cheapest vaccinations to produce and manufacture are prioritized. I am assuming that only a handful of flu strains are characterized well enough to cheaply synthesize a vaccine. Additionally, the seasonal flu vaccine is very cheap, to where pharmacies can administer them for less than 20 dollars. Money and profit is always a motivator when decisions are made. 3. The deadliest strains are prioritized. Prioritizing the strains that might be less infectious but have a higher mortality rate would decrease the overall burden on the health care system. I'm guessing that the deadlier strains would result in increased hospital visits and health care costs for a small number of people, compared to a greater number of people with minor symptoms. Vaccinating against the deadliest strains would not only save more lives, but also decrease the burdens on the hospitals and ERs. 4. The strains that are local to my area are prioritized. I could be wrong, but flu outbreaks might be local. Protecting against the strains that are local to my area would prevent spreading that specific strain beyond a geographical location, essentially creating a quarantine area. Any insights would be appreciated! submitted by /u/thesilentmantis [link] [comments]

If the sense of smell is usually associated closely with memory, what happens with memory recall/association in someone who was born without it? Posted: 19 Oct 2017 05:47 AM PDT submitted by /u/Tokusatsu_fan [link] [comments]

Can people with a cochlear implant hear the direction a sound is coming from? Posted: 19 Oct 2017 06:36 AM PDT I guess I'm asking about those who would be classified completely deaf without their implant, are they able to detect where in their environment a sound is coming from like normally functioning ears can? submitted by /u/Personwhoisfriendly [link] [comments]

Why do we need to take flu shots every year, don't we already have anti-bodies for the flu virus? Posted: 19 Oct 2017 05:52 PM PDT submitted by /u/YourAriness [link] [comments]

Why do we need sleep? Posted: 19 Oct 2017 05:12 PM PDT Title, I'm curious as to the advantages of sleep and why exactly we need it. submitted by /u/ajhiitree [link] [comments]

What makes something indigestible? Posted: 19 Oct 2017 05:05 AM PDT Why are there things our bodies can digest, and somethings that we cannot? What makes them indigestible? submitted by /u/Skylineblue [link] [comments]

Why is there still sunlight after the sun set? Posted: 19 Oct 2017 08:45 AM PDT Is it because of mountains reflecting the sunlight? In this case, is it immediately dark after a sun set in e.g the desert? Or is it because of the atmosphere? submitted by /u/6_67408 [link] [comments]

What's the reason for a red turn arrow? Posted: 19 Oct 2017 06:28 PM PDT I understand how a green arrow can allow backed up traffic to flow through but I can't see the reason for a red arrow. Why not allow motorists to turn when safe. submitted by /u/liquidthunder [link] [comments]

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