AskScience AMA Series: We're James Heathers and Maria Kowalczuk here to discuss peer review integrity and controversies for part 1 of Peer Review Week, ask us anything! |
- AskScience AMA Series: We're James Heathers and Maria Kowalczuk here to discuss peer review integrity and controversies for part 1 of Peer Review Week, ask us anything!
- Do blood vessels have a "preference" in where (or how) they develop?
- The universe is expanding at 70 (km/s)/Mps (explanation below). Is this number increasing, decreasing, constant, or we don't know?
- How Does a Forest Start or End? When and why do trees just stop growing so much?
- I recently watched One Strange Rock and Our Planet on Netflix. OSR states that diatoms produce 50% of the world O2 and OP states its phytoplankton. What actually produces 50% of the worlds oxygen?
- How did Ra-226 and Uranium get into mined coal?
- can quantum entangled particles only ever come in pairs?
- Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science
- Does it make a difference for my eyes if I read text on a high PPI screen (black text on sepia, individual pixels aren’t visible), e-reader or printed paper?
- How immediate is the vacuum of space?
- How does time dilation work without a privileged reference frame?
- Is there a “size” to an electron orbital’s node?
- What gives prescription painkillers (like opioids) their antitussive affects? And does acetaminophen (the OTC pain reliever found in Advil and cough medicines) mimic this in anyway? (If not why put it in cough medicine?)
- Why does soap need water to make bubbles?
- What are the limitations to the velocity of a projectile fired from a railgun in space/a vacuum?
- Are people with hypertension (high blood pressure) less likely to ever faint?
- Is all oil and natural gas from dead organisms?
- What makes those meteorites which explode in the atmosphere do so? And what is the source of the released energy when they do?
- What are the structural differences between the keratin inside cysts and the keratin in hair?
- Does the quantum model of the atom still have electron shells and how do they work?
- What does ear wax do for us?
- Psychologically, what is this called?
| Posted: 18 Sep 2019 04:00 AM PDT James Heathers here. I study scientific error detection: if a study is incomplete, wrong ... or fake. AMA about scientific accuracy, research misconduct, retraction, etc. (http://jamesheathers.com/) I am Maria Kowalczuk, part of the Springer Nature Research Integrity Group. We take a positive and proactive approach to preventing publication misconduct and encouraging sound and reliable research and publication practices. We assist our editors in resolving any integrity issues or publication ethics problems that may arise in our journals or books, and ensuring that we adhere to editorial best practice and best standards in peer review. I am also one of the Editors-in-Chief of Research Integrity and Peer Review journal. AMA about how publishers and journals ensure the integrity of the published record and investigate different types of allegations. (https://researchintegrityjournal.biomedcentral.com/) Both James and Maria will be online from 9-11 am ET (13-15 UT), after that, James will check in periodically throughout the day and Maria will check in again Thursday morning from the UK. Ask them anything! [link] [comments]  |
| Do blood vessels have a "preference" in where (or how) they develop? Posted: 17 Sep 2019 11:02 PM PDT In the context of development of a person's circulatory system due to exercise (aerobic or anaerobic if the context is different): do blood vessels develop in higher frequency on the outside of muscle tissue than the inside? Are there factors that dictate the locations in which these vessels develop? In the context outside of exercise, are there factors that would drive certain organs to have better vascularity? [link] [comments]  |
| Posted: 18 Sep 2019 04:09 AM PDT The expansion has been measured at about 70 km/s per megaparsec. (So, from our perspective, objects 1 megaparsec away are going away from us at 70 km/s. And objects 2 megaparsecs away, 140 km/s. And so on). When we say "The expansion of the universe is accelerating," we only mean that objects 1 megaparsec away (traveling 70 km/s away from us) will soon be a bit further away and so will be traveling 71 km/s away from us. And their velocity continues to increase as they travel away. This rate of 70 (km/s)/Mps is called the Hubble "Constant." My question is: Is this rate increasing, decreasing, or constant? If our devices aren't precise enough to measure empirical evidence to answer this question, do physicists have some guess? If this number were for some reason decreasing, and would eventually vanish, could the "big crunch" then be possible after all? [link] [comments]  |
| How Does a Forest Start or End? When and why do trees just stop growing so much? Posted: 17 Sep 2019 07:58 PM PDT This might be a silly question, but I've never really seen a forest end or begin, aside from man-made frontiers. Is there a shift between "forest" and "non-forest," and how/why does that transition happen? [link] [comments]  |
| Posted: 18 Sep 2019 04:04 AM PDT |
| How did Ra-226 and Uranium get into mined coal? Posted: 18 Sep 2019 03:51 AM PDT |
| can quantum entangled particles only ever come in pairs? Posted: 17 Sep 2019 09:44 PM PDT how many particles can be entangled together? I only hear of binary quantum entanglement? if you can have more than just to particles entangled together: in what way would measuring one photon affect (n) entangled partners, would they all collapse to the opposite? [link] [comments]  |
| Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science Posted: 18 Sep 2019 08:08 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Physics, Astronomy, Earth and Planetary Science 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]  |
| Posted: 18 Sep 2019 12:15 AM PDT |
| How immediate is the vacuum of space? Posted: 17 Sep 2019 07:31 PM PDT So let's say that you are in a space craft that has a normal oxygen, nitrogen atmosphere, at a livable pressure for humans. This spacecraft is massive and each deck is like a kilometer long. If there is a hull breach on one end of the ship, and you were on the other, how long would it take to feel the explosive decompression? Would the pressure around you maintain as the air escapes or would everything in the corridor start moving at once? [link] [comments]  |
| How does time dilation work without a privileged reference frame? Posted: 17 Sep 2019 08:52 PM PDT If a traveler is moving at near light speed when he comes to a stop he sees that we have aged and he hasn't. But aren't we the ones moving according to his reference frame so when we stop why isn't he the one that's aged and we haven't? [link] [comments]  |
| Is there a “size” to an electron orbital’s node? Posted: 17 Sep 2019 09:37 PM PDT I've only taken general chemistry so my knowledge on the subject is basically zero. So we've learned that an electron can be observed within a probability area determined by a wave function. We learn that there are "nodes" where the electron will have zero probability of being found within this area - but does it have a physically meaningful size? I'm imagining it like it was a sine graph - I can move just .0000000000000000001 (units?) away from the node where y=0, and now I have a nonzero chance of observing the electron. But is there any margin where this distance is physically insignificant and be the same as if I was still "looking at" the node? If I had the tech to look at an increasingly smaller margin just next to a node - is there a "distance limit" where I'm still having a zero chance of observing an electron? [link] [comments]  |
| Posted: 18 Sep 2019 05:56 AM PDT So the title says it all, basically, the knowledge I have is that opioids have antitussive effects (basically, cough suppressing effects) and I can't figure out if acetaminophen has this as well? The more important question is what gives them their effects? P.S. why know pharmacology or psychopharmacology flair :O [link] [comments]  |
| Why does soap need water to make bubbles? Posted: 18 Sep 2019 05:10 AM PDT |
| What are the limitations to the velocity of a projectile fired from a railgun in space/a vacuum? Posted: 17 Sep 2019 04:57 PM PDT Railgun projectiles fired in an atmosphere heat up and start slagging off because of the friction from the atmosphere. I have heard that there is no theoretical limit to how fast a railgun-fired projectile can be propelled, but factors like the railgun tearing itself apart from the recoil and atmosphere act as limitations. So if we built an "indestructible" railgun say, 100 kilometers long in space and fired it, would other limitations prevent the theoretical velocity of the projectile being reached? Or are there diminishing returns occuring? [link] [comments]  |
| Are people with hypertension (high blood pressure) less likely to ever faint? Posted: 17 Sep 2019 06:07 PM PDT I understand that hypotension (low blood pressure) can cause people to faint. Does that mean people who have high blood pressure are less likely to ever faint? Or is low blood pressure not completely essential for someone to suddenly lose consciousness? [link] [comments]  |
| Is all oil and natural gas from dead organisms? Posted: 17 Sep 2019 03:28 PM PDT I ask this because only 20% of Titan's (one of Saturn's moons) has ever been mapped. But in the region alone, there is hundreds of times more oil and natural gas than is found on all of Earth. I was under the impression that oil and natural gas formed from dead organisms. So if it's found on other places in the solar system, then isn't that proof that life once lived on these planets/moons? [link] [comments]  |
| Posted: 17 Sep 2019 11:21 AM PDT All that happens is they become surrounded by the heat generated from air compression. How does a massive rock of many tons get "cooked" sufficiently in a few seconds to shatter them? [link] [comments]  |
| What are the structural differences between the keratin inside cysts and the keratin in hair? Posted: 17 Sep 2019 10:40 AM PDT They both contain keratin, but the keratin from cysts is gooey while the keratin in hair is solid. How does this work? Is the keratin in cysts a shorter polypeptide? [link] [comments]  |
| Does the quantum model of the atom still have electron shells and how do they work? Posted: 17 Sep 2019 05:12 PM PDT The Bohr model has very clear electron shells which can only have a certain number of electrons each. Does this still apply to the quantum model? I've read a bit about orbitals but it doesn't make sense to me that each one could only have a certain number of electrons if the position of electrons are purely probability. What restricts the number of electrons? [link] [comments]  |
| Posted: 17 Sep 2019 11:00 AM PDT |
| Psychologically, what is this called? Posted: 17 Sep 2019 02:48 PM PDT What is called when someone Keeps following a choice even if it doesn't work? Here's a short story: A worker had the job to dig a hole with a bulldozer but it broke down. So, he decided to fix it and spent the whole shift doing so. Although there are 3 other working bulldozers he can use, he kept following his first choice. Psychologically what is this called? [link] [comments]  |
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