Similar to a recently asked question. If 2 cars travel at half the speed of light or more toward opposite directions, will the relative speed from one car to another be more then the speed of light?

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• Similar to a recently asked question. If 2 cars travel at half the speed of light or more toward opposite directions, will the relative speed from one car to another be more then the speed of light?
• A standard internal combustion engine burns fuel and oxygen, which burns to produce a greater number of gas molecules as well as heat. Assuming that both of these produce power, which one produces most of the power? The heat excess or the stoichiometric excess?
• Is two 50mph cars crashing same as 100mph car crashing into tree?
• Will orbits gradually become more circular over time?
• Can you feel weight distribution in a sphere?
• Has the change in languages, English for example, accelerated or decelerated in the post-broadcast era?
• Is a minute of latitude different from a minute of longitude? How much distance (at sea level) do a minute and an hour cover?
• Is there any feasible way to produce images of exoplanets thousands of lightyears away?
• How does DNA change over the course of our lives?
• How long are you contagious with COVID-19?
• Are liquids more or less dense when gases are dissolved in them?
• Are there liquids in space?
• Why do some plastics leech chemicals while others don't?
• How does under-skin become skin?
• Why do people who undergo open heart surgery often end up having short/long term memory loss?

Similar to a recently asked question. If 2 cars travel at half the speed of light or more toward opposite directions, will the relative speed from one car to another be more then the speed of light? Posted: 30 Sep 2021 02:06 AM PDT If so, how will the time and the space work for the two cars? Will they see each other tighter? submitted by /u/Tiziano75775 [link] [comments]

A standard internal combustion engine burns fuel and oxygen, which burns to produce a greater number of gas molecules as well as heat. Assuming that both of these produce power, which one produces most of the power? The heat excess or the stoichiometric excess? Posted: 29 Sep 2021 06:22 PM PDT At a simple glance C8H18+13.5O2=8CO2+9H2O, or 14.5 gas molecules into 17 gas molecules. Is this the greater cause of pressure in the cylinder, or the heat given off and the resulting expansion (roughly online with the ideal gas law)? submitted by /u/sharksgivethebestbjs [link] [comments]

Is two 50mph cars crashing same as 100mph car crashing into tree? Posted: 29 Sep 2021 04:55 AM PDT If two cars crash into each other going 50 miles per hour, is that the same force generated as just one car going 100 miles per hour crashing into a tree (any still object)? Say you had some pressure reader at middle of both crashes, would it read the same? ​ Thank you! Sorry if dumb question, know very little about physics. submitted by /u/Cartwheelbubblegum [link] [comments]

Will orbits gradually become more circular over time? Posted: 30 Sep 2021 04:37 AM PDT It's safe to say that most orbits are elliptical (I don't know if there are exceptions in this case), but over time, do they become more circular? The reason I think this would happen is that the satellite would eventually lose some of its energy from the surrounding area. I'm not saying that it would become a perfect circle, just approaching it. If this is correct, then theoretically, if infinite time passes and no outside factors affect the orbit, does it become a perfect circle? submitted by /u/TheHolyRequiem [link] [comments]

Can you feel weight distribution in a sphere? Posted: 29 Sep 2021 09:55 PM PDT Let's say you have two basketballs: one is evenly filled with 1kg of dense foam, filling its entire volume. The other is filled with 1kg of steel, but this only takes up a thin shell just underneath the outside skin of the basketball. Would there be any way to tell them apart based on feel? Would they rotate differently because the weight is distributed towards the outer edges? not limited to spheres of course, just for simplicity's sake submitted by /u/mattwinkler007 [link] [comments]

Has the change in languages, English for example, accelerated or decelerated in the post-broadcast era? Posted: 29 Sep 2021 10:08 AM PDT In another Reddit topic, the issue of whether or not English would still be intelligible in 1,000 years was brought up and noted that English of 1,000 years ago (Old English I believe) would not make much sense to a speaker of modern English. My question is: With the advent of telephones, radio, television, and now the internet, has the rate in which languages change increased or decreased compared to the past? It seems to me that changes to regional dialects would be slower than in the past since people are no longer as isolated and can hear/speak with one another more readily, leading to a decrease in change over time. However, with the increase in exposure to other cultures (globalization) it makes me wonder if this exposure is causing its own changes to languages, and thus increasing the rate of change. submitted by /u/USPO-222 [link] [comments]

Is a minute of latitude different from a minute of longitude? How much distance (at sea level) do a minute and an hour cover? Posted: 29 Sep 2021 10:40 PM PDT e.g. Central Park is at 40°42′51″ N; something on the equator is at 00°00′00″ N. How far does something have to travel to reach 00°00′01″ N? submitted by /u/letnarbel [link] [comments]

Is there any feasible way to produce images of exoplanets thousands of lightyears away? Posted: 29 Sep 2021 03:23 PM PDT I was wondering if there is a way to produce high-quality images of exoplanets thousands of light-years away that is pretty high definition. What would such a device look like? and would it even be possible? and What would the image quality of those distant worlds be? I know that there are some theories on how to image exoplanets close to us like alpha centauri but I want to dream big. It's just a question that was really bugging me P.S. Idk if this is supposed to be for astronomy or physics but I assume physics submitted by /u/bruhimgaming678 [link] [comments]

How does DNA change over the course of our lives? Posted: 29 Sep 2021 01:39 PM PDT Does DNA change due to life experiences? Could my child be genetically better at handling certain things I've had to handle in life? submitted by /u/Nickw1116 [link] [comments]

How long are you contagious with COVID-19? Posted: 29 Sep 2021 09:55 PM PDT submitted by /u/RaidenVyse [link] [comments]

Are liquids more or less dense when gases are dissolved in them? Posted: 29 Sep 2021 10:37 AM PDT I have two examples here: water that has dissolved oxygen or nitrogen, and mineral acids that have their respective gases dissolved to the maximum degree at STP - for example, oleum (H2SO4 + SO3). First thought would be a decrease in density, but how does it really play out logically? I couldn't find any density results online, even for specific percentages. submitted by /u/Chemonaut [link] [comments]

Are there liquids in space? Posted: 29 Sep 2021 07:40 AM PDT Project hail Mary had lots of interesting ideas in it, one that I've been thinking about is that a planet with different atmospheric pressure has a higher boiling point for water. I've heard that water boils at a lower temperature at high altitude and that it will spontaneously boil in a vacuum. So this begs the question, in space, without an atmosphere or gravity, do liquids exist? Can they exist? Or do all materials just sublimate back and forth between solid and gas depending on the temperature? Furthermore, the goldilocks zone would have to be wide enough to include for possibility that pressure differences could create liquid water in wider temperature ranges. (It may already of course, I've not read about it in detail) submitted by /u/eattriffids [link] [comments]

Why do some plastics leech chemicals while others don't? Posted: 29 Sep 2021 04:49 AM PDT submitted by /u/Bjeffwoff [link] [comments]

How does under-skin become skin? Posted: 29 Sep 2021 02:42 AM PDT I had a blister under a callous that I peeled off, which left a gaping, stinging mess of red and hurty underflesh. Now it is no longer stinging, but not quite the same as normal skin. In several more days, it will be indistinguishable from the other skin on my hand. What is the process that happens to the under-skin that makes it become regular skin. submitted by /u/Toorelad [link] [comments]

Why do people who undergo open heart surgery often end up having short/long term memory loss? Posted: 29 Sep 2021 09:20 AM PDT submitted by /u/MacTheBigg [link] [comments]

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Why are men in western countries half as fertile today as they were in the 1970's? What is the biggest contributor to this recent Male Fertility Crisis?

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• Why are men in western countries half as fertile today as they were in the 1970's? What is the biggest contributor to this recent Male Fertility Crisis?
• AskScience AMA Series: I am Geoff Barnes, M.D., a cardiologist and vascular medicine specialist at the University of Michigan Health System in the US. Today is World Heart Day and I am excited to be here to answer your questions about all things heart health and blood clots. Ask me anything!
• Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology
• Can there be several RNA polymerases transcribing RNA from DNA during transcription?
• What makes a sponge an animal?
• How did scientists first figure out what the internal structure of a cell looks like? Was a microscope able to show individual parts?
• Why is the shingles vaccine only offered to people over 50?
• Does removing the right medial temporal cortex and hippocampus make you lose all your visual memory?
• Is there an impact on injections/vaccines from exercise shortly afterwards?
• Pangea: how did the oceans form?
• What gives different flavours of quarks their respective properties?
• Why does light in a aurora form the patterns it does, that look like waving strands and curtains, and not just simply a diffuse glow?
• Could/do peptide bonds form between amino acid R groups?
• What form of energy do electrons lose/gain when moving across a potential difference?
• If you have a circuit with a component that uses 8 Volts, what would happen to the remaining voltage if you used a voltage supply of more than 8 volts?
• What (if anything) besides the new Delta variant has made Covid so much more deadly among the unvaccinated?
• Metaphorically speaking: Is a Lagrange point a hill, a plain, or a valley?
• What happens to fish (and other aquatic animals) during a severe flash flood?
• How do we calculate the greenhouse influence of various gases in the atmosphere?
• Why does Covid-19 cause decreased white blood cell counts?

Why are men in western countries half as fertile today as they were in the 1970's? What is the biggest contributor to this recent Male Fertility Crisis? Posted: 28 Sep 2021 07:30 PM PDT I just saw this short Vice documentary called Spermageddon that talked about the Male Fertility Crisis. The video referenced a meta analysis quoted below in an article in The Guardian. The study, published in the journal Human Reproduction Update by an international team of researchers, drew on 185 studies conducted between 1973 and 2011, involving almost 43,000 men. The team split the data based on whether the men were from western countries – including Australia and New Zealand as well as countries in North America and Europe – or from elsewhere. After accounting for factors including age and how long men had gone without ejaculation, the team found that sperm concentration fell from 99 million per ml in 1973 to 47.1 million per ml in 2011 – a decline of 52.4% – among western men unaware of their fertility. For the same group, total sperm count – the number of sperm in a semen sample – fell by just under 60%. Richard Sharpe, an expert in male reproductive health and professor at the University of Edinburgh, welcomed the study, saying the research has tackled many of the problems of previous analyses, adding that it "is about as close as we are going to get" to being sure of the decline. But he stressed it still unclear what is behind the drop, meaning that it is difficult to address. "That is primarily because we have seriously under-invested in male reproductive research," he said. The Vice video showed an interview with Epidemiologist Dr. Shanna Swan of the Icahn School of Medicine, who said that sperm concentration is falling on average about 1% per year. She said that when sperm concentration drops below 40 million per ml, you start to have trouble conceiving. The Vice video mentioned some suspected reasons for male fertility problems like increased exposure to endocrine disruptors like plastics poor quality/quantity of sleep poor diet So, experts are saying it's unclear what's behind the Spermageddon, but I don't buy it. Some questions I have: What has changed since the 1970's that is contributing to male infertility? What is the largest contributor to male infertility today? What were men 40 years ago doing that was making them more fertile than men today? submitted by /u/JayT1D [link] [comments]

AskScience AMA Series: I am Geoff Barnes, M.D., a cardiologist and vascular medicine specialist at the University of Michigan Health System in the US. Today is World Heart Day and I am excited to be here to answer your questions about all things heart health and blood clots. Ask me anything! Posted: 29 Sep 2021 04:00 AM PDT I'm Geoff Barnes, M.D., and I work as a cardiologist and vascular medicine specialist at the University of Michigan Health System in the United States. You can follow me on Twitter at @GBarnesMD. My professional areas of interest include anticoagulation, venous thromboembolism, quality improvement and shared decision-making. I'm currently leading multiple NIH- and AHRQ-sponsored studies to improve the safety for patients on chronic anticoagulants. In honor of World Heart Day, I'm here to answer anything you want to know about heart health and blood clots. For instance, did you know that people with atrial fibrillation (AFib) are at greater risk for stroke and are estimated to account for 15% of the 15 million strokes that occur worldwide every year? I'll get started around 2pm ET (18 UT) - AMA! Username: /u/WorldThrombosisDay submitted by /u/AskScienceModerator [link] [comments]

Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology Posted: 29 Sep 2021 07:00 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Biology, Chemistry, Neuroscience, Medicine, Psychology 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]

Can there be several RNA polymerases transcribing RNA from DNA during transcription? Posted: 29 Sep 2021 02:36 AM PDT submitted by /u/oldnips [link] [comments]

What makes a sponge an animal? Posted: 28 Sep 2021 04:01 PM PDT My understanding of Poriferans is that they consist of cells that are all working independently, with no true tissues or higher level of organisation. Why then, are they considered multicellular animals rather than an aggregation of unicellular eukaryotes? What differentiates the sponges? submitted by /u/entomologically [link] [comments]

How did scientists first figure out what the internal structure of a cell looks like? Was a microscope able to show individual parts? Posted: 28 Sep 2021 10:08 AM PDT submitted by /u/concerninglydumb [link] [comments]

Why is the shingles vaccine only offered to people over 50? Posted: 28 Sep 2021 08:42 PM PDT submitted by /u/Burntjellytoast [link] [comments]

Does removing the right medial temporal cortex and hippocampus make you lose all your visual memory? Posted: 29 Sep 2021 04:00 AM PDT I heard that visual memory was stored in right side of the brain and was wondering if the title above would be true and if so, would that make us unable to have mental images? submitted by /u/Frequent-Trick4149 [link] [comments]

Is there an impact on injections/vaccines from exercise shortly afterwards? Posted: 28 Sep 2021 09:46 PM PDT Is there any impact on effectiveness of vaccines or incidence of minor side effects(ie arm pain), from doing exercise shortly after receiving an IM injection? submitted by /u/ForumUser013 [link] [comments]

Pangea: how did the oceans form? Posted: 29 Sep 2021 01:30 AM PDT Originally, Pangea was a big landmass. As the plates moved away from each other, a gap was left between, which made an ocean. My question is this: what would an ocean forming look like? Would it be a very slow river starting to appear, that then widens? A gap that forms below sea level that then fills up through water drainage in the sides? Or a gap that goes below sea level until a point when the gap suddenly touches an ocean and it all rushes in? Tldr: seeping, river or big sploosh? submitted by /u/ScaredOutcome7223 [link] [comments]

What gives different flavours of quarks their respective properties? Posted: 28 Sep 2021 07:14 PM PDT Eg what actually makes an up and down quark have different charges? Does it have something to do with magnetic moments & angular momentum? submitted by /u/MadMan1244567 [link] [comments]

Why does light in a aurora form the patterns it does, that look like waving strands and curtains, and not just simply a diffuse glow? Posted: 28 Sep 2021 09:15 AM PDT Or maybe with some turbulent motion. But the kinds of formations it does appear as: that looks like something that has a story behind it. submitted by /u/Jillian_Wallace-Bach [link] [comments]

Could/do peptide bonds form between amino acid R groups? Posted: 28 Sep 2021 07:22 PM PDT Obviously it's not supposed to happen, but does it, if only to be immediately undone? Take aspartate for example; what's stopping the R group carboxylic acid from reacting with an amine group in place of the "main" carboxylic acid? If this DOES happen, what is the result? submitted by /u/jpfeifer22 [link] [comments]

What form of energy do electrons lose/gain when moving across a potential difference? Posted: 28 Sep 2021 05:05 PM PDT Consider a basic circuit where a 9V battery is connected directly to a 9kΩ resistor. The current will be 1mA everywhere, meaning there is a constant rate of electron flow through any given point in the circuit. The potential difference across the battery and resistor are both 9V. Voltage is measured in joules per coulomb (volts), suggesting that the average electron has more energy before flowing through the resistor than after. The classic explanation I've heard is that electrons flowing quickly through a narrow resistor tend to collide with the static nuclei, releasing heat and reducing the electrons' kinetic energy. However, since the electron flow rate is the same at all points in the circuit, the electrons should have the same amount of kinetic energy on both battery terminals (and thus on both ends of the resistor). Considering this, when moving across a potential difference like a battery or a resistor, what form of energy do the flowing electrons actually gain/lose? submitted by /u/JWson [link] [comments]

If you have a circuit with a component that uses 8 Volts, what would happen to the remaining voltage if you used a voltage supply of more than 8 volts? Posted: 28 Sep 2021 08:54 AM PDT Might be a really dumb question but if you go beyond the 8 volts when the system only requires only 8 volts, what would happen to remaining voltage in in the system? For example if I used a 10 voltage battery, would the battery only release 8 volts or would you need somehow adjust current/resistance to be able to run the system without overheating the component? Edit: Thank you for all the replies as they all helped me grasp the concept a lot more easier :) submitted by /u/Kami0312 [link] [comments]

What (if anything) besides the new Delta variant has made Covid so much more deadly among the unvaccinated? Posted: 28 Sep 2021 04:25 PM PDT I was reading a /r/bestof post inspired by this comment. What got me was the comment "... we used to work hard and some people got better. Now we work hard and almost nobody gets better..." My wife works in healthcare and tells me the same thing - compared to "early Covid" pre-vaccine times, it seems more and more like once unvaccinated people need BiPAP (i.e. HiFlow O2 is not enough) things now seem to inevitably progress to a one-way trip down BiPap / Intubation / ECMO / death. The percentage who get better from these levels seems much lower than it did. Is this just my wife and my imaginations? Or has something about the nature of the disease evolved to make it more deadly once you get beyond a certain point? submitted by /u/foodfighter [link] [comments]

Metaphorically speaking: Is a Lagrange point a hill, a plain, or a valley? Posted: 28 Sep 2021 05:56 PM PDT By Metaphorically speaking I mean in terms of getting there and staying there. submitted by /u/booleanfreud [link] [comments]

What happens to fish (and other aquatic animals) during a severe flash flood? Posted: 28 Sep 2021 12:25 PM PDT The back-to-back flooding from Henri and Ida (both in August) carved out a few feet from the banks of the section of creek in the backyard of my home (in the US northeast) with a corresponding drop in water level. I've seen very few fish since in the creek after the flooding. What happens to fish (and frogs, crayfish, and other creek-dwelling animals) during and after a big flash flood? submitted by /u/Wyatt_Urp [link] [comments]

How do we calculate the greenhouse influence of various gases in the atmosphere? Posted: 28 Sep 2021 05:11 PM PDT Context about what I need the answer for: I'm doing a speculative evolution project using a planet with an atmosphere both thicker and richer in CO2, and I'd like to get more detailed information about the effect that has on temperature, especially with some of the other factors I have going on with the planet. I would also like to be able to generate such information for myself in future projects, so I'm looking for an equation; or at least a pattern of derivation that can lead me to a very rough semblance of an equation. I know the partial pressures of the composition of my atmosphere, the solar flux, and the planets average albedo. How do I get to an average planet temperature with that? ​ ​ - - - me trying to guess, feel free to ignore - - - So, if I take the energy coming from the sun (F=solar flux), and multiply it by the amount left over after some is reflected away as light (A=1-planet bond albedo), then that's the amount of energy that eventually has to leave the planet in the form of heat radiation (R=total escape radiation=FA). So if I find the fraction of energy not trapped by the atmosphere (E=radiation escape rate), then I should be able to multiply that by the actual surface energy (S=surface energy) to get R. Thus I have the equation ES=R, but I want to solve for S, so it becomes S=R/E. and R=FA, so S=FA/E Now, E is the tricky part. The way I think about it, this fraction is equivalent to the odds of a particular unit of heat escaping without being reflected back to earth by any given unit of the atmosphere. When you double the atmosphere density, you're adding twice as many chances to be reflected. So if the odds of escape at 1 unit of atmosphere are X, then the odds at 2 units are X^2, and so on. Think like if you were rolling a die for each unit of atmosphere, trying to get at least one 6. More atmosphere, more dice. Since X is a fraction less than 1, that means diminishing returns per unit of atmosphere. However, each type of gas has different inherent odds of redirecting energy. This is where I'm running into tons of trouble. The greenhouse power of a gas, or it's 'radiative efficiency' (G= radiative efficiency) is defined as "the change in 'energy flow' (I guess that means the amount of energy reflected back to earth? I'll call it T.) per part (p=total parts of reference gas) per billion (B=total parts in atmosphere). G=TP/B. My main problem with this, which is a VERY big problem, is that you can solve that equation with the same B as jupiter, and as long as P rises proportionately, T will never change. In any case, if I try to model the situation using T instead of E, then I get energy coming in to the planet, a smaller amount coming out, and this T value that just sits there. But that T has to go somewhere, and theres more F coming in, so FA+T gets reflected back to the atmosphere, and T gets reflected back to surface again, releasing FA to space and finding equilibrium. Thus S=FA+T. I wouldve thought that energy release was proportional to the amount of energy present though. submitted by /u/Taloir [link] [comments]

Why does Covid-19 cause decreased white blood cell counts? Posted: 28 Sep 2021 09:03 AM PDT During acute covid-19 infection patients are seen to have decreased white blood cell counts. Is this due to SARS-cov-2 actually infecting white blood cells or just inflammation destroying WBCs? Can COVID infect T cells? Specifically CD4 cells? submitted by /u/withinda [link] [comments]

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Why do antigen rapid tests not work after 15 minutes?

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• Why do antigen rapid tests not work after 15 minutes?
• Does the wood from different trees burn at different temperatures when made into charcoal?
• Is the flu shot the same in different parts of the United States?
• Can nuclear waste still be used for energy?
• How are age groups decided for the COVID vaccine?
• What determines the viscosity of oils?
• What is the most culinarily elaborate “dish” made by a nonhuman animal?
• What causes sheet metal to make the *wobble* sound when oscillated?
• Why was the Higgs Boson being lighter than expected such a big deal?
• Why are gauge bosons called "gauge bosons"?
• How do COVID swabs work if COVID doesn't last very long in warm temps outside of the body?
• Is there anyway of knowing how many generations of stars it took to make us/ earth?
• How does a fan creare low pressure?

Why do antigen rapid tests not work after 15 minutes? Posted: 27 Sep 2021 10:32 AM PDT I've used two different types of antigen rapid tests. Both say that the results aren't valid if more than fifteen minutes have past since testing (dropping the solution onto the test kit.). Why is this so? Do the coloring/colored molecules that do the binding no longer work, or weaken, after 15 minutes? Or does a positive turn into a negative? submitted by /u/quillqueer [link] [comments]

Does the wood from different trees burn at different temperatures when made into charcoal? Posted: 27 Sep 2021 06:29 PM PDT Specifically I was wondering about a particular tree, Osage Orange, that has an extremely high burning temperature. If charcoal was made from its wood would it burn hotter than charcoal from another tree thats wood doesn't burn as hot? Sorry if I got the tag wrong, i wasn't sure whether to use chemistry or biology. submitted by /u/PsychopathicDiAngelo [link] [comments]

Is the flu shot the same in different parts of the United States? Posted: 27 Sep 2021 03:33 PM PDT If I got a flu shot in Oregon and then moved to Maine, would I still be protected? I am moving 3,000 miles across the country, and I was planning to get the flu shot before I move - should I wait until after I move? submitted by /u/platinumplantain [link] [comments]

Can nuclear waste still be used for energy? Posted: 28 Sep 2021 06:48 AM PDT As far as I'm aware, waste fuel from nuclear power plants is still radioactive/fissile. Seeing as waste management seems to be the biggest counterpoint to nuclear energy, what can be done with the waste? Can you use a different configuration of reactor which generates energy from the waste? Or is there a way to speed up the half life so the waste is more stable/less dangerous? submitted by /u/StoneyBolonied [link] [comments]

How are age groups decided for the COVID vaccine? Posted: 27 Sep 2021 03:07 PM PDT The Pfizer-BioNTech might soon be approved for 5-11 year olds. How are these age groups decided? Is it largely arbitrary or historical? By expected weight? Or is the 'maturity' of an immune system by a certain age a factor? submitted by /u/vostok412 [link] [comments]

What determines the viscosity of oils? Posted: 28 Sep 2021 05:49 AM PDT submitted by /u/nickoskal024 [link] [comments]

What is the most culinarily elaborate “dish” made by a nonhuman animal? Posted: 27 Sep 2021 02:33 PM PDT Whether it involves combining two separate foods, cooking the food, or preparing it some other way, what the most complicated transformation that an animal has made to its meal? submitted by /u/VisceralSardonic [link] [comments]

What causes sheet metal to make the *wobble* sound when oscillated? Posted: 27 Sep 2021 01:18 PM PDT Example of phenomenon: https://www.reddit.com/r/oddlysatisfying/comments/pwi4na/the_sound_these_sheets_of_metal_make/?utm_medium=android_app&utm_source=share My two thoughts were either waves of air compression created by the movement, or perhaps the metal itself "readjusting" to the bending and making that sound. submitted by /u/yodog5 [link] [comments]

Why was the Higgs Boson being lighter than expected such a big deal? Posted: 27 Sep 2021 02:07 PM PDT submitted by /u/Snoo60913 [link] [comments]

Why are gauge bosons called "gauge bosons"? Posted: 27 Sep 2021 02:59 PM PDT You couldn't prove it by me that they have a whole lot to do with gauging anything, so where did that name come from? submitted by /u/Return_of_Hoppetar [link] [comments]

How do COVID swabs work if COVID doesn't last very long in warm temps outside of the body? Posted: 28 Sep 2021 12:34 AM PDT I know that they DO work, I just don't know HOW. I know that sometimes the samples aren't actually tested for hours after collection. Is there some sort of chemical on the swabs that preserves the sample? Or does the test somehow pick up on dead virus cells? (Using the medicine flair because this applies to a lot of different types of viral testing.) submitted by /u/heyimjason [link] [comments]

Is there anyway of knowing how many generations of stars it took to make us/ earth? Posted: 27 Sep 2021 07:13 AM PDT Basically the title. I know everything heavier then hydrogen is made in a star, it goes supernova, and elements get scattered. The dust from that is formed into a new star and repeats. "we are all made of star stuff" How many of these cycles did it take to get the elements we have on earth. submitted by /u/sgtsteelhooves [link] [comments]

How does a fan creare low pressure? Posted: 27 Sep 2021 01:00 PM PDT I have been googling for the past days trying to figure out how fans are used to suck things etc. The only thing I could find was that fans create low pressure but no website explined how? What does a spinning fan do to the surrounding air? How does it cause low pressure? submitted by /u/TekTekNa [link] [comments]

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Why isn’t knowing the structure of a molecule enough to know everything about it?

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• Why isn’t knowing the structure of a molecule enough to know everything about it?
• The oceans are huge- Where did all the water in our planet come from?
• How can stardust create stars if (a) stars need hydrogen and (b) star dust is formed after stars have run out of hydrogen?
• Have any diseases been eradicated due to covid health guidelines?
• How are life expectancies calculated?
• What percentage oxygen would mars need to have to support humans at its current atmospheric density?
• Is ionizing radiation harmful to technology?
• Do monoclonal antibody treatments reduce formation of durable immunity against reinfection?
• How/Why does Jean Foucault's pendulum work?
• How does olivine convect in the mantle?
• Are flagella found on cells lining the female oviducts?
• What happens if the larger of two binary stars goes supernova?
• Would the Hubble be able to take a picture of the James Webb and Vice Versa?

Why isn’t knowing the structure of a molecule enough to know everything about it? Posted: 26 Sep 2021 08:05 PM PDT We always do experiments on new compounds and drugs to ascertain certain properties and determine behavior, safety, and efficacy. But if we know the structure, can't we determine how it'll react in every situation? submitted by /u/mhk98 [link] [comments]

The oceans are huge- Where did all the water in our planet come from? Posted: 26 Sep 2021 04:47 PM PDT submitted by /u/Moon_In_Scorpio [link] [comments]

How can stardust create stars if (a) stars need hydrogen and (b) star dust is formed after stars have run out of hydrogen? Posted: 26 Sep 2021 10:04 AM PDT How can stardust create stars if (a) stars need hydrogen and (b) star dust is formed after stars have run out of hydrogen? submitted by /u/DriveEmOut [link] [comments]

Have any diseases been eradicated due to covid health guidelines? Posted: 27 Sep 2021 03:08 AM PDT Basically the title. Are there any diseases that have been or are projected to be virtually or completely eradicated due to the stricter hygiene, social distancing, and shelter in place guidelines of the past 18 months? submitted by /u/chumicorro [link] [comments]

How are life expectancies calculated? Posted: 26 Sep 2021 09:09 PM PDT I saw this post in r/worldnews about the impact of COVID-19 on life expectancy. I absolutely do not understand how the math is done. Life expectancy is expressed as life expectancy at birth, as in, how long someone born today is expected to live. I do not understand how that figure is affected in any way no matter how many currently-living people die of war, disease or whatever. See this paragraph from the linked article: Last week, the Office for National Statistics estimated that life expectancy for men in the UK had fallen for the first time in 40 years because of the impact of Covid-19. A boy born between 2018 and 2020 is expected to live until he is 79, down from 79.2 for the period of 2015-17, according to the ONS. So please enlighten me: why are 5 year-old boys expected to live slightly longer lives than 1 year-old boys because COVID happened?! submitted by /u/poe_todd [link] [comments]

What percentage oxygen would mars need to have to support humans at its current atmospheric density? Posted: 27 Sep 2021 01:31 AM PDT submitted by /u/Olly230 [link] [comments]

Is ionizing radiation harmful to technology? Posted: 27 Sep 2021 03:55 AM PDT I know that ionizing radiation is harmful to living creatures because it damages our DNA and large amounts of other electromagnetic radiation can mess with certain technologies (very strong magnet wiping hhd data). I have no idea if ionizing radiation affects any types of technology though. submitted by /u/bandti45 [link] [comments]

Do monoclonal antibody treatments reduce formation of durable immunity against reinfection? Posted: 26 Sep 2021 01:47 PM PDT submitted by /u/boredtxan [link] [comments]

How/Why does Jean Foucault's pendulum work? Posted: 26 Sep 2021 10:37 PM PDT I understand that the earth rotates underneath the pendulum, which is why the axis it swings on changes, but the pendulum is attached to a structure that is also on Earth. Wouldn't that affect the motion of the pendulum as well? Does the length of the string matter? submitted by /u/RT1327 [link] [comments]

How does olivine convect in the mantle? Posted: 26 Sep 2021 02:00 PM PDT I know the mantle is generally solid all the way down, and that the mantle has convection, but how? I get that you can have "viscoelastic" materials like putty that deform somewhat easily but I'm struggling to imagine olivine doing this. Do the crystals move, and how? And how does this explain mantle plumes? submitted by /u/HeavyMetalAstronomer [link] [comments]

Are flagella found on cells lining the female oviducts? Posted: 26 Sep 2021 07:41 PM PDT submitted by /u/SpiritedAd4380 [link] [comments]

What happens if the larger of two binary stars goes supernova? Posted: 26 Sep 2021 07:16 AM PDT Specifically, Antares. If I understand correctly, the larger star is substantially more massive and brighter than the smaller. I also understand that the larger is somewhere on the list of future supernova candidates. In the event it does make a supernova, what happens to the smaller star? Nothing? Is it destroyed? Does it gain mass from what was expelled from the larger star? What would all this look like to observers here on Earth? submitted by /u/Interplanetary-Goat [link] [comments]

Would the Hubble be able to take a picture of the James Webb and Vice Versa? Posted: 25 Sep 2021 09:53 PM PDT Question... submitted by /u/allenout [link] [comments]

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