- I keep reading about how Covid has had a worse effect on minorities in the US particularly blacks. Is this all because of environmental/societal reasons, or do people of African decent actually have a harder time with the virus physically?
- do your teeth move at night?
- How do they make COVID-19 mRNA?
- What causes the boundary layer to separate?
- Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology
- What’s the reasoning for different needle lengths with vaccines?
- Does the percentage of vaccinated per capita include children and others that medically or legally can't vaccinate?
- Is there any particular reason that Pangea broke apart parallel to the Appalachian Mountains? If and when Asia and India separate again, are they more likely to do so along the original convergent boundary?
- How do antibodies fight viruses and bacteria, and what are the differences in dealing with the two? How do they 'know' what to attack? And for a local infection (like from a cut), does the body know to send extra antibodies there, or are they always equally dispersed through the body?
- Why are there so many Coronavirus variants all of a sudden?
- Why are some masks effective against the "normal" covid but not good enough for some of the variants?
- Why are people with Down syndrome more susceptible to covid?
- Why do we say electrons in a metal move around with velocities determined by kT instead of the Fermi level?
- In terms of the vaccines, what’s the difference between JNJ-78436735 and Ad26.COV2.S? How many types of vaccines is Johnson & Johnson developing, and which one is planned to roll out soon?
- Does widespread immunity decrease virus mutation rates?
- How and why did they detonate the little boy 580 meters above Hiroshima?
- Multiple vaccinations for same disease?
- Why are some people unable to speak after a stroke?
- How fast did the Chicxulub Impactor appear as it collided with Earth?
- How do debris/people move back into the ocean during tsunami?
| Posted: 27 Jan 2021 05:33 AM PST |
| Posted: 27 Jan 2021 03:09 AM PST ik this sounds weird lol but i think i remember someone saying/reading somewhere that your body swells a little bit while you sleep. but when i stay up way extra too late it feels like when i bite down my teeth aren't in the right place.. if that makes sense, just slightly shifted. so are your teeth included in this? or your skeleton i guess [link] [comments]  |
| How do they make COVID-19 mRNA? Posted: 27 Jan 2021 07:10 AM PST I've learned that mRNA is essentially a direct order for your cells to make COVID-19 antigens, so instead of your cells taking mRNA from the nucleus, the COVID-19 vaccine mRNA hijacks the mechanism to make COVID-19 antigens. Now I'm curious how do they actually make such mRNA? Do they snip the genetic material from the virus itself? Or do they have to actually create one? Sorry if this has been asked before, a link to the thread would be appreciated. Thank you! [link] [comments]  |
| What causes the boundary layer to separate? Posted: 27 Jan 2021 02:37 AM PST I was looking at a example of a fluid flowing past a sphere, it was mentioned that at low velocities the air hugs the ball evenly everywhere, low speed means that less impulse is given to the fluid, therefore the effects of pressure will be much stronger and the back of the ball will suck in the airflow and even out the pressure on the back and front, is this correct? Then I looked at examples of flow around a ball but a much faster one, then the thing with the boundary layer separating confuses me a lot, i think the cause is the side inertia (can i even call it that, i know its some kind of side force gained from moving in a not straight direction around the ball, it looks like inertia to me) can fight the ow pressure on the back for a time, is this correct it makes sense to me but i cant find any way to confirm it. [link] [comments]  |
| Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology Posted: 27 Jan 2021 07:00 AM PST 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! [link] [comments]  |
| What’s the reasoning for different needle lengths with vaccines? Posted: 26 Jan 2021 11:24 PM PST While I do have a background in clinical laboratory science, I'm more versed in the "how it works" from an immunological standpoint and not the "how to deliver it." I understand gauge (we were taught this as it applies to hemolysis, lol), but I'm curious about lengths. I noticed that my Covid vaccine (Pfizer) needle was quite long today, longer than my flu vaccine. I didn't realize the first time, but for some reason I really wanted to take a look today! Is this to do with viscosity? I did "feel" the first dose, and my second dose today really did feel like syrup in my arm. Either way, I'm glad to be vaccinated, I'd love to learn more about this. [link] [comments]  |
| Posted: 27 Jan 2021 06:20 AM PST |
| Posted: 26 Jan 2021 06:24 PM PST |
| Posted: 27 Jan 2021 07:43 AM PST |
| Why are there so many Coronavirus variants all of a sudden? Posted: 27 Jan 2021 06:22 AM PST I understand that the virus can evolve and mutate, but why is it that after a year of pandemic with no significant mutations, suddenly there are 3 new variants in a few weeks? Thanks a lot and sorry for English mistakes. [link] [comments]  |
| Posted: 27 Jan 2021 06:19 AM PST A lot of people are buying different masks because of the new variants, why don't the masks work if the virus structure/size is basically the same? [link] [comments]  |
| Why are people with Down syndrome more susceptible to covid? Posted: 26 Jan 2021 02:27 PM PST I was scrolling Twitter and saw this tweet and became curious. The tweet essentially claims that people with Down syndrome face "risks 10x greater with covid" I did a quick google and found this site that states people with Down syndrome are more likely to have sleep apnea which can add to the risks with covid. Apologies if I haven't thoroughly checked my own source but I can't readily find any more info. My main question is why are people with Down syndrome so much more at-risk than others, and if it really is all about sleep apnea then why isn't that being discussed more considering many more people suffer from sleep apnea (I believe that is very common with overweight folks, shout-out USA) than Down syndrome to the best of my knowledge. [link] [comments]  |
| Posted: 26 Jan 2021 09:42 AM PST It's all over solid state text books that the velocity of electrons in a metal (assume no applied field) is something like root(kT/m) (I don't care about the 2's and/or 3's that I'm missing). This perspective makes sense because it's sort of the amount of energy an electron might get from the thermal bath it's sitting in. But also, from QM, if we keep adding fermions (electrons in this case) to the metal, they'll occupy higher and higher energy states. Even at T = 0, the electrons will have nonzero energy, in particular, electrons at the top will be at the Fermi energy. In this case, the thermal velocity would be zero, but the Fermi velocity can get up near a percent of the speed of light (graphene for example). Clearly this is a huge discrepancy. So, why do we say electron speed is governed by kT instead of the Fermi level? It's a quantum vs classical issue as pointed out. Dense systems of electrons should go by Fermi energy, sparse systems can use kT. [link] [comments]  |
| Posted: 26 Jan 2021 06:58 PM PST Maybe I'm misunderstanding this, but can someone clearly delineate the differences between these two vaccines? Which one is currently being tested and considered for authorization in the coming weeks? What makes the two different, is that significant? I did not previously realize that Johnson & Johnson is developing and testing two or three separate vaccines: JNJ-78436735, Ad26COVS1, and Ad26.COV2.S. Basically, my question is about which one is planned for use, and what are the differences between them? [link] [comments]  |
| Does widespread immunity decrease virus mutation rates? Posted: 26 Jan 2021 02:52 PM PST With ongoing news about mutations to the covid-19 virus (and potential impacts to vaccine programs) I'm curious what the relationship between the level of population immunity and mutation rate is. It would stand to reason that lower infection rates -> fewer opportunities for mutation -> greater long term vaccine efficacy; but of course what's intuitive isn't always right. Are we in a race to get ahead of mutations, or does it not really matter? [link] [comments]  |
| How and why did they detonate the little boy 580 meters above Hiroshima? Posted: 26 Jan 2021 09:59 AM PST |
| Multiple vaccinations for same disease? Posted: 26 Jan 2021 08:02 PM PST What would happen if someone was administered multiple vaccines for the same disease? For example, for Covid-19, we have the moderna/Pfizer, astrazeneca-oxford, j&j vaccines which differ from each other (I think). What will happen if someone received each of them? [link] [comments]  |
| Why are some people unable to speak after a stroke? Posted: 26 Jan 2021 10:45 AM PST |
| How fast did the Chicxulub Impactor appear as it collided with Earth? Posted: 26 Jan 2021 05:54 AM PST To an observer, did it travel like a bullet hitting a wall? Or like a cruise ship hitting a pier (slow velocity but huge momentum)? The film Melancholia, for example, shows a relatively slow impact in the final scene. Definitely not "blink and you miss it" [link] [comments]  |
| How do debris/people move back into the ocean during tsunami? Posted: 26 Jan 2021 07:35 AM PST I understand that it is a wave phenomenon and water currents but I can't seem to grasp why like in events or tsunami the debris flows back into the ocean? [link] [comments]  |
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