Why does earth rotate ? |
- Why does earth rotate ?
- Is weathering/erosion of rock by water more due to chemical or mechanical processes?
- Do people respond to acronyms with the same part of their brain as their actual phrases?
- Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology
- Why are red blood cells safe from natural killer cells?
- How to obtain energy gain or loss of chemical reactions?
- Timeline of a viral infection of one cell?
- Nasal Covid 19 vaccine?
- If Omicron spike protein changes wouldn’t it be harder for it to attach to nasal lining cell surface receptors?
- Can moles cause a landslide?
- Why does South Africa do so much genetic sequencing of COVID viruses in comparison to other countries?
- What makes a virus more contagious and easier to transmit?
- What do astronomers mean when they talk about gases in the interstellar medium heated to millions of degrees? Would you experience this "heat" while moving through these gas clouds (i.e. will you get fried away into atomized dust)?
- Do we know how long ago epicanthic folds evolved?
- How much power output is associated with the astrophysical jets of a neutron star/black hole? Is it comparable to the radiation output of a star?
- How do T-Cells recognize a virus differently than Antibodies?
- Is mutational load increase in humans something we should be worried about?
- By how much has COVID reduced life expectancy?
- How do refrigerators maintain temperature?
| Posted: 01 Dec 2021 10:10 AM PST |
| Is weathering/erosion of rock by water more due to chemical or mechanical processes? Posted: 01 Dec 2021 06:47 AM PST I was reading this page: https://opengeology.org/textbook/5-weathering-erosion-and-sedimentary-rocks/ And while they indicate here that "chemical" weathering is the primary mechanism, wouldn't "mechanical" be the most significant factor? As in, moving/falling water would cause more weathering than still water over the same time period? And wouldn't faster moving water cause more weathering than slower moving water? [link] [comments] |
| Do people respond to acronyms with the same part of their brain as their actual phrases? Posted: 01 Dec 2021 07:39 AM PST ALSO: Provided they understand both the phrase and the acronym, will a person respond to an acronym of a phrase and the actual phrase in the same way? I was texting my friend about how it's weird that people find it easier to talk about the treatment of POWs over the treatment of prisoners of war. He responded a bit later that he had "fallen for it" and didn't really have a visceral response when he read "POWs" but did when he read "prisoners of war" in my text, even though afaik he knows what POW stands for. I keep trying to find studies on how acronyms affect our thinking in situations like this but I mostly just find the list of abbreviations used in neuroscience with the way I'm searching :P can anyone help me out here? The first question is more neuroscience but the second is more psychology so sorry if there's a way to add two flairs and I didn't realize it lol [link] [comments] |
| Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology Posted: 01 Dec 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] |
| Why are red blood cells safe from natural killer cells? Posted: 01 Dec 2021 03:50 PM PST I'm currently reading Philipp Dettmer's excellent book, Immune. In it, he explains that unlike other immune cells, natural killer cells identify infected/corrupt cells by (among other things) detecting the absence of MHC Class I molecules on the surface of the cell, which are normally in abundance on all healthy nucleated cells in the human body. In a footnote, he explains that infected red blood cells are safe(r?) from NK cells because they don't have MHC Class I molecules anyway. What's not explained (as far as I can tell; I haven't quite finished the book) is how the NK cell knows the absence of MHC I on a red blood cell is normal. Is there some other marker that says "I'm a red blood cell" or is there more to activating NK cells than the reduction of this molecule? Or can the NK cells simply not trigger apoptosis in red blood cells for some reason? I'm not sure if I am missing something or my understanding is just fundamentally incorrect and I should go back and re-read a few chapters. [link] [comments] |
| How to obtain energy gain or loss of chemical reactions? Posted: 01 Dec 2021 04:56 AM PST Chemical reactions either take or release energy. So this "energy" must be on either the reactant or at the product side. What specific chemistry concept is this? I assume that I need specific computations for getting the energy of all reactants and products as well, how do I obtain this "energy" value as well? what formulas and table values do I need to use? [link] [comments] |
| Timeline of a viral infection of one cell? Posted: 01 Dec 2021 04:24 PM PST As I understand, a virus spike protein latches to the cell receptor. The viral RNA (or DNA, not sure) gets inside and starts instructing the cell to produce more viruse copies. Eventually, the cell bursts and releases the virus copies. My question is how long does each step take? Is it super quick like 10 seconds or super long like 10 minutes or more? [link] [comments] |
| Posted: 01 Dec 2021 03:23 PM PST Are there nasal vaccines against in development in the USA? [link] [comments] |
| Posted: 01 Dec 2021 12:11 AM PST |
| Posted: 01 Dec 2021 04:01 AM PST So every once in a while I find their little tunnels when I wake up in the morning, I really do not mind them at all, I'm happy that they get to live in my big land, however I am wondering if there is a risk to the house I am living in. It's a wood house, its stacked on concrete pillars, it's the size of a fairly big apartment, could moles dig enough tunnels below the house to eventually cause a cave in/landslide? [link] [comments] |
| Posted: 30 Nov 2021 04:25 PM PST |
| What makes a virus more contagious and easier to transmit? Posted: 01 Dec 2021 12:36 PM PST We are hearing a lot about the COVID-19 variants. First, one of the dangerous properties of COVID-19 was how easily and quickly it spread, compared to others. Then we got the Delta variant and now Omicron. With each one the WHO and the CDC have said they are more easily transmitted than past versions of COVID-19. What attributes actually make a virus more contagious and/or more easily spread than another? [link] [comments] |
| Posted: 30 Nov 2021 07:52 PM PST For context, this wikipedia article on the Bullet Cluster has the following bit: "The Bullet Cluster is one of the hottest-known clusters of galaxies. It provides an observable constraint for cosmological models, which may diverge at temperatures beyond their predicted critical cluster temperature.[1] Observed from Earth, the subcluster passed through the cluster center 150 million years ago, creating a "bow-shaped shock wave located near the right side of the cluster" formed as "70 million kelvin gas in the sub-cluster plowed through 100 million kelvin gas in the main cluster at a speed of about nearly 10 million km/h (6 million miles per hour)".[5][6][7] The bow shock radiation output is equivalent to the energy of 10 typical quasars." [link] [comments] |
| Do we know how long ago epicanthic folds evolved? Posted: 30 Nov 2021 07:27 PM PST I know we are not sure why this trait appeared in people living in certain locations, but we have estimates of when it appeared? [link] [comments] |
| Posted: 01 Dec 2021 02:40 AM PST And is it possible, in theory, for an advanced civilization to harness this energy to generate power? What are some challenges that might arise if someone tried to do this (is it more feasible than building a dyson cloud/dyson sphere)? I imagine that the strength of the aforementioned astrophysical jets depends on the size of the black hole/neutron star as well as what it's currently feeding on, and is therefore highly variable. However, if possible I would like to get a rough understanding of the power involved, to within a few orders of magnitude. Thank you in advance. [link] [comments] |
| How do T-Cells recognize a virus differently than Antibodies? Posted: 30 Nov 2021 02:42 PM PST I've seen some people indicate that cellular (T-Cell) immunity to Omicron may be preserved even if neutralizing antibodies are not. I would have thought the T-Cells "learn" the same pattern as the antibodies do by exposure to the spike proteins generated by your body in response to the vaccines. How does it work that T Cells can recognize a mutated virus more effectively than antibodies do? [link] [comments] |
| Is mutational load increase in humans something we should be worried about? Posted: 01 Dec 2021 01:47 AM PST https://pubmed.ncbi.nlm.nih.gov/31424543/ Is there an unsustainable amount for humanity? If so, where is the threshold, and what would be the most noticeable consequences of passing it? [link] [comments] |
| By how much has COVID reduced life expectancy? Posted: 30 Nov 2021 05:36 PM PST This question is based on two assumptions. If either is incorrect, please tell me. First, to my knowledge COVID is a disease which causes no damage or negligible damage to the large majority of infected people but which causes catastrophic damage or death to a significant minority of infected. Since older people are the most likely to suffer these serious effects, using the impact on life expectancy could be a more useful statistic to indicate the effect the disease has had on public health on aggregate as opposed to raw numbers of infections and deaths. Second, I am assuming that there is a general upwards trend in life expectancy as time goes by due to incremental improvements in medicine and public health when it comes to dealing with existing threats. Since it appears that COVID is not going away, I assume that its emergence has had an impact on life expectancy in the long term. Would it be correct to say that this jas set the progress in life expectancy back? Could we calculate by how much? For example could we say that the negative impact of COVID has counteracted 5 years of gains in life expectancy for example? Since new threats will inevitably appear, can we predict how life expectancy will change in future? [link] [comments] |
| How do refrigerators maintain temperature? Posted: 30 Nov 2021 08:56 PM PST So does the fridge measure the air temperature and work off that? That seems to not be a good measure given opening the door and the volumetric heat capacity of air vs. say water (and thus, say, milk) and other substances. I have a small thermometer in my fridge that seems to go above 40 because I go in for some PB&J (and associated bread, of course) and a beverage here and there. I know I'm letting the cold out, but things are okay, so I assume the difference in heat capacitance makes things safe, and so that got me wondering about things. I wonder if it would make more sense to have a thermometer immersed in water and read that to know when things are off. [link] [comments] |
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