What do heavy metals really do to a person, and what does our body do to get rid of them?

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• What do heavy metals really do to a person, and what does our body do to get rid of them?
• Are neurons immortal? Do neurons die and regenerate like the rest of your cells throughout your life? If so, how is the information preserved?
• How did we discover molecular processes like the Krebs cycle or electron transport chain?
• Why does anemia make you crave chewing ice?
• Does a binary star system create a dynamic Goldilocks zone?
• Why do left - handed fermions form a doublet/transform under SU(2) and right handed don't?
• Does grass have flowers?
• How is the maximum capacity of a bridge calculated?
• Is a Reynold's number higher than 4000(using SI units) always turbulent? Also where does the usefulness of this value break down?
• When a person is anesthetized, does s/he behaves as if were assleep (like snoring, dreaming) or is it something completely different?
• Do countries in the tropics have a, "flu season"?
• Can there be dwarf rogue planets?
• What do the pollen count numbers actually mean?
• How does the equipartition system apply to macroscopic degrees of freedom?
• Is it possible to have saltwater rain?
• If what I've read about photons is correct, they follow the conservation of energy. What happens to the energy from the photon after it is absorbed by the retina and we "see" it?
• What, physiologically, makes an animal warm blooded or cold blooded?
• Why do OTC drugs like ibuprofen sometimes turn up as false-positives for THC and/or PCP on drug screenings?
• How does possitive void coefficient work?

What do heavy metals really do to a person, and what does our body do to get rid of them? Posted: 23 May 2019 11:02 PM PDT There's been plenty of misinformation spread thanks to the vaccine scare, so I'm curious to have some facts. Let's say some unfortunate person has eaten a tomato with an amount of lead in or on it. The symptoms of heavy metal poisoning are easy enough to find online, but what exactly is happening to cause the symptoms? It's usually a bad thing to have them around in the body, so what does the body do to remove them? Are they just filtered out by the kidneys like a lot of other stuff? Do they break down somehow on their own? submitted by /u/ZeinaTheWicked [link] [comments]

Are neurons immortal? Do neurons die and regenerate like the rest of your cells throughout your life? If so, how is the information preserved? Posted: 23 May 2019 10:13 PM PDT A) Are neurons immortal? B) If not, how come my memory doesnt get wiped every few years or even decades? C) Also, if a person were to live for a very very long time with the help of machines that would keep his organs working, would we be able to observe all his neurons die and his memories fade? Or would the brain just continue to function indefinitely? (I'm short, can the brain die of old age like other organs) submitted by /u/mrhouse1101 [link] [comments]

How did we discover molecular processes like the Krebs cycle or electron transport chain? Posted: 24 May 2019 05:09 AM PDT "I need someone to explain this to me like I'm a 5 year old" - Michael Scott It's very easy to see how astronomers can look at large moving bodies and formulate a hypothesis and test the hypothesis with models and then identify if celestial motion can be accurately predicted. How do we do this in a cell? How do we replicate cellular biology? It's blowing my mind and I assume these processes work so fast and are so small that we can't visually see them. submitted by /u/tkcalibo [link] [comments]

Why does anemia make you crave chewing ice? Posted: 23 May 2019 09:30 PM PDT submitted by /u/always-slightly-late [link] [comments]

Does a binary star system create a dynamic Goldilocks zone? Posted: 23 May 2019 11:09 PM PDT Would 2 or more stars in a system create a habitable zone which is always changing in position in respect to the stars' location? submitted by /u/KOSTAFLEX [link] [comments]

Why do left - handed fermions form a doublet/transform under SU(2) and right handed don't? Posted: 24 May 2019 06:08 AM PDT I am studying the electroweak interaction and Higgs - mechanism and I am trying for days now to find an answer to my questions but I can't... I would be glad for help :) submitted by /u/herrschoftszeitn [link] [comments]

Does grass have flowers? Posted: 24 May 2019 05:37 AM PDT I was wondering, if grass has flowers or how are they producing seeds you can buy and make your lawn. I have never seen that type of grass having flowers although the seeds look similar to grain seeds. submitted by /u/PelicanRulezz [link] [comments]

How is the maximum capacity of a bridge calculated? Posted: 24 May 2019 03:48 AM PDT Maximum amount of cars that can be on a bridge, taking in count the length and the weight of the car and the outside factors submitted by /u/killthots [link] [comments]

Is a Reynold's number higher than 4000(using SI units) always turbulent? Also where does the usefulness of this value break down? Posted: 23 May 2019 11:44 PM PDT It seems to me like Reynold's number is one of those "good enough" types of equations and I've been wondering if this relation is always true or if certain cases defy any assumptions made by the usual equation of (density X velocity X diameter)/(dynamic viscosity) submitted by /u/Gallade475 [link] [comments]

When a person is anesthetized, does s/he behaves as if were assleep (like snoring, dreaming) or is it something completely different? Posted: 24 May 2019 05:41 AM PDT Basically my brother is in surgery right now and I began to wonder about this. ​ Thanks in advance submitted by /u/DangerASA [link] [comments]

Do countries in the tropics have a, "flu season"? Posted: 23 May 2019 11:42 PM PDT I live in Australia and we are coming into winter so it's coming to, 'flu season', and time to get our flu shots. What happens in the tropics where it is just warm all the time? Do they still have a flu season or a certain time of year they are encouraged to get flu shots? submitted by /u/Ruby_Dalia [link] [comments]

Can there be dwarf rogue planets? Posted: 23 May 2019 11:56 PM PDT Can there be dwarf rogue planets? submitted by /u/RABALA [link] [comments]

What do the pollen count numbers actually mean? Posted: 23 May 2019 08:47 AM PDT A friend of mine is looking for an explanation of the pollen count scale. She wants to know "how a measurement is converted to this scale, is it linear, etc." She was looking up information on it, but she kept getting simplified style info, and she wants more detailed scientific explanation of it. Thank you! submitted by /u/junipermucius [link] [comments]

How does the equipartition system apply to macroscopic degrees of freedom? Posted: 24 May 2019 02:02 AM PDT My lecture notes on Experimental Methods includes a description of thermal/Johnson noise in electrical circuits. The argument used to quantify the amplitude of this noise is to consider a closed RC circuit (no voltage source). The energy stored in the system is (1/2)CV2. Equipartition then requires every quadratic energy term to store an energy (1/2)kT (at high temperatures), and from this we can obtain the RMS voltage. I fully understand why equipartition applies to a system composed of a large number of particles, where each composing particle introduces as many microscopic quadratic energy terms as it has degrees of freedom. What I don't get is why the voltage of the RC circuit should count as a degree of freedom in itself, given that it is macroscopic. I suppose this connects to a broader question about the range of applicability of the equipartition theorem. What counts as a "degree of freedom" of a system? I hope this question is clear - I'm not entirely sure it's clear in my head and so please do ask if I can clarify something. submitted by /u/Movpasd [link] [comments]

Is it possible to have saltwater rain? Posted: 23 May 2019 10:22 AM PDT submitted by /u/Jason_DeHoulo [link] [comments]

If what I've read about photons is correct, they follow the conservation of energy. What happens to the energy from the photon after it is absorbed by the retina and we "see" it? Posted: 23 May 2019 11:26 AM PDT submitted by /u/jaydee8001 [link] [comments]

What, physiologically, makes an animal warm blooded or cold blooded? Posted: 23 May 2019 11:25 AM PDT Does heat generation come from the inefficient use of high energy molecules? What parts of the body generate heat, does this happen everywhere, or does it occur in a particular organ such that blood can carry it to other places? I've heard that muscle usage might be attributed to this, however we still generate heat while we are resting, right? submitted by /u/WhatIsPlagiarism [link] [comments]

Why do OTC drugs like ibuprofen sometimes turn up as false-positives for THC and/or PCP on drug screenings? Posted: 23 May 2019 12:06 PM PDT This has happened to me twice, and although it didn't effect the outcome of my employment in anyway (they don't test for THC), it has me wondering how many folks out there may have lost their jobs because of this. submitted by /u/SoldMomForKarma [link] [comments]

How does possitive void coefficient work? Posted: 23 May 2019 01:46 PM PDT Hey, so i understant negative void coefficient; steam = 1/1860 the neutron absorbing qualities of water, more steam bubbles, or voids, = less neutons absorbed = reactivity decreases. Can someone please explain how positive void coefficient works. i understant that increased voids = increased reactivity, although in not sure why it works. I can grasp this in a RBMK reactor where the moderator (graphite) is different to the coolant (water). This is because the increased voids = less liquid water = less cooling, however the graphite moderator remains there so neutrons absorbed reducing reactivity, although in not sure what relevence the increase of steam from water has on neutrons (apart from the lack of cooling aspect, which effects temp of core however to my knowlage not neutrons). Appologies for the shoddy explination I hope you understand what im asking Thanks submitted by /u/Dat-Boyo [link] [comments]

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Why is gold used on connector ends, like on usb-connectors for gaming mice, when copper has lower electrical resistivity?

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• Why is gold used on connector ends, like on usb-connectors for gaming mice, when copper has lower electrical resistivity?
• What is the estimated depth of the liquid water oceans on Titan?
• Can a diurnal predatory species evolve to become nocturnal if their prey is nocturnal? And vice versa? And can it shift back in the other way?
• Are there any examples of food ingredients used today which were first recognized and regulated as drugs?
• Lysosomes - are they more specialized than what I am led to believe in basic physiology lectures?
• Can a storm go in a circle or go backward and hit the same place twice?
• Why do all the planets with substantial axial tilt have such similar angles (besides Uranus)?
• Why when glancing colored led lights sometimes you can see the discrete colors?
• How do European cosmetic industries develop new products without animal testing?
• Are different metals usually found together in mineral deposits?
• Why do Newton's Law of Universal Gravitation and Coulomb's Law of electrostatics look nearly identical?
• In a refrigerator, do a number of water bottles (say 20) cool faster when touching in a square grid or when separated by air?
• How are (high-precision) elevation/hight measurements done?
• How does Trans-cranial magnetic stimulation(TMS) work?
• Can we store information in black holes ?
• Do partially torn ligaments/tendons ever fully heal?
• Where does food go when it “goes down the wrong pipe”?
• If metals consist of positive ion cores surrounded by delocalised electrons, with no discrete bonds to make/break, why don't metals stick together when you touch them to eachother?
• How and when do bacteria in our guts get in there?
• Can lactose dissacharides form polymers?

Why is gold used on connector ends, like on usb-connectors for gaming mice, when copper has lower electrical resistivity? Posted: 23 May 2019 04:15 AM PDT I'm reading about electrical components and a table in my book describes "Resistivities of common conductors". Here ideal resistance is described by: ​ Resistance = rho (material resistivity) * L (length of wire) / A (area of cross section of wire) ​ With unit [10^(-8) Ohm meters] copper is cited as having a value of 1.7 where as gold has a value of 2.4. Is the principle of gold connectors just a marketing hoax? submitted by /u/babystrumpor [link] [comments]

What is the estimated depth of the liquid water oceans on Titan? Posted: 23 May 2019 02:14 AM PDT Seeing that Titan is thought to have a lot more water compared to earth, what would the estimated depth of the water oceans on Titan be? And bonus question, where does all this water cone from? submitted by /u/georgelappies [link] [comments]

Can a diurnal predatory species evolve to become nocturnal if their prey is nocturnal? And vice versa? And can it shift back in the other way? Posted: 22 May 2019 04:09 PM PDT Let's say there's an island with hawks who are active during the day; rabbits who are active during the day, and raccoons who are active during the night. Hawks eat rabbits and raccoons. Slowly, due to some unrelated factor like disease, the rabbit population starts to diminish, so raccoons become an increasingly important food source for the hawks. Over time, can the hawks evolve new behaviors and physical features to make them better at night hunting so they can catch more raccoons? Let's say hundreds of generations have gone by and the hawks have evolved owl-like senses and nocturnal patterns to get really good at catching raccoons in the dark. Could the raccoons then start adapting their behavior and/or physiology to become more active during the day and less likely to be eaten by these formidable night-hawks? submitted by /u/Darth_Squid [link] [comments]

Are there any examples of food ingredients used today which were first recognized and regulated as drugs? Posted: 22 May 2019 05:14 PM PDT I had a colleague assert to me that it would be impossible to gain regulatory approval for a food ingredient, used at any concentration, which has a history of use as a drug. This doesn't sound correct to me, but I could not think of any falsifying examples. I have thought of examples in the other direction, like vitamin D supplements vs the prescription, concentrated vitamin D caps, or fish oil vs the concentrate sold as Omacor or Lovasa for lipid lowering. But in both of those cases the low-concentration food ingredient came first. Has it ever gone the other way? Could it? submitted by /u/cazbot [link] [comments]

Lysosomes - are they more specialized than what I am led to believe in basic physiology lectures? Posted: 23 May 2019 07:57 AM PDT hi! ​ there have been several different times when I came up with a version of the same question: how do lysosomes "know" what to digest? example to illustrate what I mean: in thyroid hormone production, thyroglobulin (TGB) is taken up by the follicular cell. the endosome, full of TGB, fuses with a lysosome, which digests the TGB to release free T3/T4. how is it that the lysosome does not end up digesting the T3/T4 as well? do follicular cells express only certain kinds of enzymes that only break specific bonds within TGB and leave T3/T4 intact? ​ basically - we're taught that lysosomes are these enzyme-filled bags that just digest anything they come across, but that seems very simplistic, and I am curious to know more about their heterogeneity! submitted by /u/TheDegreesCollector [link] [comments]

Can a storm go in a circle or go backward and hit the same place twice? Posted: 23 May 2019 07:57 AM PDT submitted by /u/irmike1283 [link] [comments]

Why do all the planets with substantial axial tilt have such similar angles (besides Uranus)? Posted: 23 May 2019 07:54 AM PDT I was flipping through recent NASA APOD posts, and came across this one depicting the solar system planets along with some of their characteristics, including axial tilt. I noticed that all the planets with major axial tilt besides Uranus are all quite similar in angle, between 23 and 29 degrees. Are there any solid theories as to why this is? submitted by /u/Iceman_259 [link] [comments]

Why when glancing colored led lights sometimes you can see the discrete colors? Posted: 23 May 2019 06:15 AM PDT With some projectors too. Sometimes when I glance at these color changing led lights I can see the discreet RGB colors? Do they flicker at different times? or is it the eye persistence of vision resolving this flicker? submitted by /u/f3rn4ndrum5 [link] [comments]

How do European cosmetic industries develop new products without animal testing? Posted: 23 May 2019 06:07 AM PDT Animal testing for cosmetic products is banned in Europe. On this subreddit I've read that there aren't any real alternatives though and also read surveys that show the vast majority of experts think animal testing is necessary. How do European cosmetic industries develop new products then? Are they just implementing old formulas without any real breakthrough? Has this ban put an end to any further technological development in the industry? submitted by /u/Esiodo [link] [comments]

Are different metals usually found together in mineral deposits? Posted: 23 May 2019 05:46 AM PDT Are different metals found together in mineral deposits? And if so, are there metels more likely to be found together? submitted by /u/Brainmold [link] [comments]

Why do Newton's Law of Universal Gravitation and Coulomb's Law of electrostatics look nearly identical? Posted: 23 May 2019 05:36 AM PDT For those unfamiliar, here is Coulomb's Law that governs electrostatics and this is Newton's Law of Universal Gravitation. Both laws state that the force experienced by an object under the influence of the field is equal to the product of the determining property (either mass or charge) multiplied by a constant, and divided by the square of the distance between them. Obviously there are differences. The gravitational constant (G) is very small, while the electrostatic constant (k) is very large, but essentially the equations are mirrors of each other. Swap charge with mass and change the value of the constant and Coulomb's Law becomes Newton's Law and vice versa. I know both gravity and electrostatic force are field properties, so I'm guessing that might be why they look so similar, but I was wondering if this is a simple explanation (like they both happen to function as an inverse square, thus the equations are like convergent evolution) or if it hints at some fundamental similarity in origin between gravity and charge. My knowledge in modern physics as far as quantum and string theory aren't strong enough to draw any conclusions. submitted by /u/Shovelbum26 [link] [comments]

In a refrigerator, do a number of water bottles (say 20) cool faster when touching in a square grid or when separated by air? Posted: 23 May 2019 04:43 AM PDT I drink a lot of water bottles (not because the internet said the 8x8 rule, that's dumb) so I'm constantly putting bottles in my fridges; the problem is that they don't get cold immediately (obviously), so how should I position them to cool the quickest? Buffered by air? Square grid? If grids are better surely Honeycomb grids are even better. Should the gridded bottles be standing? Or parallel to the ground like a wine bottle shelf? Very interested in how this is calculated as well. Edit: Physics I guess? submitted by /u/Vibron83 [link] [comments]

How are (high-precision) elevation/hight measurements done? Posted: 23 May 2019 03:38 AM PDT The question should cover it, just to make sure/clarify: I'm not talking about a known/created "zero" point and a second unknown point. These delta's are, relatively, easy to calculate and can be very accurate with sensitive equipment. Examples of what I do mean: Mount Everest is said to be 8844.43m (29,017ft). The altitude data I see on my smart-phone (-14m/-45ft). How is this determined, in relation to what and how accurate can we be (and does this even make sense)? Especially the last part has been bothering me. Earth is a "living and breathing" thing; Tectonic plates, an active core, a radius of 6371.0 km (3958.8 mi) [equatorial 6378.1 km (3963.2 mi)] etc. etc. Which makes a known fixed point all but impossible(???) and if so all other measurements are approximations at best. I know that in real life and regarding my phone it is irrelevant if I'm -14m or -14.36m or -13.82 below sea level. But 8844.43m seems awfully specific.... And 'real life' is besides the point in this case. And all this because I saw a land surveyor at work. Sigh...... submitted by /u/nevahre [link] [comments]

How does Trans-cranial magnetic stimulation(TMS) work? Posted: 23 May 2019 02:58 AM PDT I read about TMS in a neuroanatomy book and am under the impression that it basically works by the principle of electromagnetic induction and this is exactly what I cannot seem to understand. For an electric potential to be induced there are two requirements- 1) Changing magnetic fields and 2) There should be a conductor present in these changing magnetic fields for electrical potential to be induced. How is the brain tissue a conductor? I mean of course brain is electrically active but that is due to the exchange of ions as far as I know and neurons mostly work in two mode inhibitory and excitatory states, how does TMS affect this in any significant way and bring about the effects mentioned in the book? submitted by /u/ClarkDale123 [link] [comments]

Can we store information in black holes ? Posted: 22 May 2019 10:49 PM PDT Let me explain myself: for an outsider perspective something falling into a blackhole will seem to be going slower and slower while reaching the event horizon, and we never will see the object disappear into the black hole. Therefore, would it be possible to send objects that carries visual information? Like for example leaving messages for civilization far beyond us ? submitted by /u/shape_shifty [link] [comments]

Do partially torn ligaments/tendons ever fully heal? Posted: 22 May 2019 10:46 PM PDT I've partially torn my pec tendon doing bench press over the years. These seemed to me to be somewhat minor injuries since I would recover within a few weeks and there was no bruising around the tendon. Do these types of injuries ever fully heal? Or will that tendon be forever weaker than it could've been? submitted by /u/larrybates1 [link] [comments]

Where does food go when it “goes down the wrong pipe”? Posted: 22 May 2019 11:48 AM PDT submitted by /u/TerryTanker [link] [comments]

If metals consist of positive ion cores surrounded by delocalised electrons, with no discrete bonds to make/break, why don't metals stick together when you touch them to eachother? Posted: 22 May 2019 05:07 AM PDT submitted by /u/jomangojo [link] [comments]

How and when do bacteria in our guts get in there? Posted: 22 May 2019 08:24 AM PDT It is obvious that bacteria cannot exist in our guts congenitally; therefore there should be a natural mechanism that puts them in our guts. Is it basically our diet or something intricate? submitted by /u/krap35 [link] [comments]

Can lactose dissacharides form polymers? Posted: 22 May 2019 08:48 AM PDT Lactose is a reducing sugar, but I have never heard of a oligomer of lactose. Potentially the glucose could react with another monomer of galactose, and the galactose again with a glucose etc etc. I know that polymers are generally regarded as repeating monomers, like cellulose and galactan for the monomers in lactose. I am just wondering whether polymers of alternating monomers would be feasible, and if yes, why do they not exist? submitted by /u/ajaxfanaticus [link] [comments]

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At what altitude do compasses cease to work?

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• At what altitude do compasses cease to work?
• If bit flips are a huge concern as the technology used in consumer electronics gets smaller and smaller, what measures are being used to protect against them?
• are black holes super cold?
• What are the first specialized cells created in an human embryo, and what is the mechanism for proper relative positioning of different types of specialized cells?
• Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology
• Will urban areas be considerably quieter when all vehicles become electric?
• Why doesn't Teslas (or other electric cars) come with solar panels to recharge while driving?
• How do we reach extremely low temperatures? The likes of bellow 50 Kelvin.
• How is the spin of elementary particles without charge determined?
• What is the smallest known organism that has a multi-chambered heart?
• Does the amount of chewing and final mush of food affect in any significant way the speed of digestion and metabolism of said food?
• Does the ISS need course corrections due to people moving around inside, and if so how frequently does it happen?
• Can humans receive blood from chimps ?
• Why do computer screen pixels change colours when pressed on?
• How would the result have changed if Pavlov linked the noise directly after the meal (fullness) opposed to before/during?
• How lethal is acute radiation sickness today, compared to 1986 ? Has anything changed?
• How do vaginal microbes affect twins at birth?
• What happens to your blood pressure when you stand up?

At what altitude do compasses cease to work? Posted: 21 May 2019 01:59 PM PDT submitted by /u/dr_greasy_lips [link] [comments]

If bit flips are a huge concern as the technology used in consumer electronics gets smaller and smaller, what measures are being used to protect against them? Posted: 21 May 2019 02:06 PM PDT If there are any measures that can be used. submitted by /u/licknipssucktips [link] [comments]

are black holes super cold? Posted: 22 May 2019 04:24 AM PDT My thought was black holes are so powerful that nothing escapes so they must be very cold. Secondly if some heat escapes does escape does that mean the area around a black hole is Super hot? Thank you for your answers. submitted by /u/bright_shiny_objects [link] [comments]

What are the first specialized cells created in an human embryo, and what is the mechanism for proper relative positioning of different types of specialized cells? Posted: 21 May 2019 02:04 PM PDT submitted by /u/Hatsuwr [link] [comments]

Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology Posted: 22 May 2019 08:12 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Economics, Political Science, Linguistics, Anthropology Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...". Asking Questions: Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists. Answering Questions: Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience. If you would like to become a member of the AskScience panel, please refer to the information provided here. Past AskAnythingWednesday posts can be found here. Ask away! submitted by /u/AutoModerator [link] [comments]

Will urban areas be considerably quieter when all vehicles become electric? Posted: 21 May 2019 11:22 AM PDT How significant is the amount of sound produced by engines, compared to all the other sounds made in a city? One day when every vehicle on the road will be electric, will overall noise pollution be significantly reduced? submitted by /u/UNDERLOAF [link] [comments]

Why doesn't Teslas (or other electric cars) come with solar panels to recharge while driving? Posted: 21 May 2019 07:44 PM PDT Why don't Teslas (or other electric cars) come with solar panels to recharge while driving? submitted by /u/CrispeeLipss [link] [comments]

How do we reach extremely low temperatures? The likes of bellow 50 Kelvin. Posted: 21 May 2019 05:12 PM PDT More specifically, how is rocket fuel frozen to the low temperature that it is? And for that matter, how are the the extreme low temperatures like below a single Kelvin reached? I've tried doing some research into the matter, but neither Google nor Bing were showing me the answers I was looking for. I've tried rephrasing my searches, but in the end I'm hoping at least reddit has what I'm looking for. submitted by /u/TrivkyVic [link] [comments]

How is the spin of elementary particles without charge determined? Posted: 21 May 2019 10:30 AM PDT I think I understand that the angular momentum of particles with an eletric charge will "give" those particles a magnetic momentum which can be measured. However for elementary particles that possess no eletrical charge I'm unsure of how their spin can be detected and effectively measure. submitted by /u/Caetharo [link] [comments]

What is the smallest known organism that has a multi-chambered heart? Posted: 21 May 2019 09:44 AM PDT How large does an organism need to be for its heart to have distinct chambers and be recognized as what we would usually call a "heart"? I've read that some small organisms have heart-like structures or "false hearts" but I'm having trouble finding information about chambered hearts in small organisms. Can you help? submitted by /u/zax9 [link] [comments]

Does the amount of chewing and final mush of food affect in any significant way the speed of digestion and metabolism of said food? Posted: 21 May 2019 08:59 AM PDT I've been wondering this as I'm a very fast eater and have also noticed that it takes me a very long time to become hungry again. I know I'm getting older and metabolism slows down, but am wondering if I can help this with chewing my food more? submitted by /u/Zypheroldskool [link] [comments]

Does the ISS need course corrections due to people moving around inside, and if so how frequently does it happen? Posted: 21 May 2019 03:52 AM PDT submitted by /u/GMaestrolo [link] [comments]

Can humans receive blood from chimps ? Posted: 21 May 2019 01:34 AM PDT submitted by /u/armughan1122 [link] [comments]

Why do computer screen pixels change colours when pressed on? Posted: 20 May 2019 09:36 PM PDT submitted by /u/fluorescent_chicken [link] [comments]

How would the result have changed if Pavlov linked the noise directly after the meal (fullness) opposed to before/during? Posted: 21 May 2019 05:21 AM PDT submitted by /u/CBate [link] [comments]

How lethal is acute radiation sickness today, compared to 1986 ? Has anything changed? Posted: 20 May 2019 09:40 PM PDT Yeah yeah I'm watching the HBO show about the Chernobyl disaster. It made me wonder how ARS could affect us today compared to Chernobyl. Has there been any advances in medicine which could help mitigate the symptoms of ARS, and thus increasing survaivability? Are there better methods to treat patients today? I know the symptoms vary depending on the dose, but in general terms, has anything changed? submitted by /u/DragoLEB [link] [comments]

How do vaginal microbes affect twins at birth? Posted: 20 May 2019 09:43 PM PDT When twins are born by natural parturition, usually the firstborn will get more vaginal microbes than the second child as the first child takes most of it. 1.Does this create any difference in their later life? Is there a possibility of the second child to come out getting more microbes and the first child not getting that many? submitted by /u/Deoxyribau5 [link] [comments]

What happens to your blood pressure when you stand up? Posted: 20 May 2019 10:02 PM PDT And how does your body fix it? submitted by /u/ileisen [link] [comments]

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How do you calculate drag coefficients?

---

• How do you calculate drag coefficients?
• Is There Any Scale Where The Distribution Of Electric Charge Within A Neutron Is Relevant?
• What role does insulin even play in the production of adipose tissue?
• Is there a size limit to the size of a hurricane or cyclone on Earth?
• Does brain size determine the intellect of a creature? Are there examples of an animal with a small brain being more intelligent than a big brained animal?
• Why doesn't the ecliptic lie on the same plane as the Milky Way?
• Foundation question: Why are ligand-gated channels not considered active transport?
• Can humans and chimps reproduce?
• If vaccines are dead/deactivated/weakened forms of a disease, then what is preventing us from making vaccines for all diseases?
• Do you get infinite energy if you interconnect a motor and a generator?
• How do you calculate the preload value of a threaded bolt?

How do you calculate drag coefficients? Posted: 20 May 2019 12:02 PM PDT never taken a physics class but I've taught myself a lot to some degree of success with the exception of calculating drag/ drag coefficients. It has absolutely confounded me, everything I see requires the drag and everything for calculating the drag requires the drag coefficient. I just want to find out how fast a thing falls from a height and the energy it exerts on impact. ​ (want to run the numbers on kinetic bombardment. also, want to know how because am trying to find out where an airplane crashed, no it is not Malaysia flight 370. but I just need to know how for that, it's just plugging in numbers at this point) ​ if yall want to do the math, here are the numbers; 6.096m long, .3048m diameter cylinder that weighs 8563.51kg and is being dropped from a height of 15000km and is making impact at sea level. is made of tungsten. ​ assume that it hits straight on, base first, with no interferences from any atmospheric activities (wind) or debris (shit we left in orbit) and that it's melting point is 6192 degrees F so it shouldn't lose any mass during atmospheric re-entry (space shuttles experience around 3000 degrees F on reentry according to https://science.howstuffworks.com/spacecraft-reentry.htm so I think it'll be fine for our purposes.) ​ sorry this was meant to be just like the first paragraph but it turned into much more. thanks. edit: holy shit this got a good bit of upvotes and comments, I didn't notice cause my phone decided to just not tell me but thank you all for the help and suggestions and whatnot!! it's been very helpful in helping me learn more about all this!! edit numero dos: I'm in high school (junior) and I haven't taken a physics course here either but I have talked with the physics teachers and they've suggested using Python and I'm trying to learn it. but thank you all so much for your time and thought out answers!! it means a lot that so many people are taking the time out of their day and their important things to help me figure out how much energy a metal rod "falling" from orbit releases. submitted by /u/NGVYT [link] [comments]

Is There Any Scale Where The Distribution Of Electric Charge Within A Neutron Is Relevant? Posted: 21 May 2019 05:41 AM PDT A neutron contains valence quarks with both positive and negative charges so tightly bound that on most if not all conventional scales the baryon as a whole can be treated as a single electrically neutral particle. My simplified layman's understanding is that the strong force typically dominates the electromagnetic force on scales for which it's relevant at all, but is there any scale where the electromagnetic force operating on the charged components of a neutron is relevant to understanding the behavior of those components or the neutron as a whole? Is this expected to change at sufficiently high energy states (e.g before discrete atomic nuclei formed)? submitted by /u/brigandr [link] [comments]

What role does insulin even play in the production of adipose tissue? Posted: 20 May 2019 08:47 PM PDT submitted by /u/fffreshprinceee [link] [comments]

Is there a size limit to the size of a hurricane or cyclone on Earth? Posted: 20 May 2019 05:38 PM PDT submitted by /u/Raskolinkovonfire [link] [comments]

Does brain size determine the intellect of a creature? Are there examples of an animal with a small brain being more intelligent than a big brained animal? Posted: 20 May 2019 04:30 PM PDT If so, are they utilizing their brains better and how did that come about? submitted by /u/icecreamdude97 [link] [comments]

Why doesn't the ecliptic lie on the same plane as the Milky Way? Posted: 20 May 2019 05:42 PM PDT and do other known exoplanets orbit at random angles? Or retro grade orbits? submitted by /u/bigsur1982 [link] [comments]

Foundation question: Why are ligand-gated channels not considered active transport? Posted: 20 May 2019 12:14 PM PDT I have seen several sites that claim that channels are all passive or facilitated transport proteins but then I see ligand-gated channels come up with some channels opening up after being phosphorylated. Sooooooo I don't get it. How can these channels still be considered facilitated diffusion? ​ In general I'm having trouble understanding which transport proteins of a cell membrane use active transport and which don't use ATP at all. I know that things like aquaporins are completely ATP free but that's about as concrete as I can get. Every other transport protein seems to have conflicting info online. submitted by /u/Sciencequestions10 [link] [comments]

Can humans and chimps reproduce? Posted: 20 May 2019 05:38 AM PDT Humans and chimpanzees share the same kingdom, phylum, class, order, suborder, infraorder, family, subfamily, and tribe. Is it possible for a human and a chimp to produce viable offspring? submitted by /u/scratchedeggs [link] [comments]

If vaccines are dead/deactivated/weakened forms of a disease, then what is preventing us from making vaccines for all diseases? Posted: 20 May 2019 12:35 PM PDT For example, what is preventing us from making a vaccine for herpes and other STDs, like AIDS/HIV? submitted by /u/nordbjerg [link] [comments]

Do you get infinite energy if you interconnect a motor and a generator? Posted: 21 May 2019 01:27 AM PDT The physics I've learned here is only from high school so please bear with my mistakes. So I've learned that a coil when rotated in a magnetic field produces current, and when a current flows through a coil in a magnetic field,. The coil rotates. Basically a generator and a motor respectively. What if we connect a motor to a generator such that when you manually rotate the coil in a generator, it produces a current which can be used to rotate the coil in the motor. While the very same coil can be used to rotate the one in the generator which can lead to infinite energy and both coils would rotate forever. submitted by /u/PopeFrancis711 [link] [comments]

How do you calculate the preload value of a threaded bolt? Posted: 20 May 2019 08:31 AM PDT Everything I find online is confusing and requires constants I'm not familiar with. If I have say a 6" stainless steel threaded bolt, how can I calculate the preload? Thanks submitted by /u/YTsetsekos [link] [comments]

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