If you are on the moon, does Earth appear to go through phases? |
- If you are on the moon, does Earth appear to go through phases?
- Could an animal come back from extinction due to evolving?
- How fast did the extinct giant insects like Meganeura flap their wings to accomplish flight? Were the mechanics more like of modern birds or modern small insects?
- Why does the continuous spectrum of a heated matter depend only on its temperature?
- Medicine: What actually kills someone with cancer?
- Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology
- Why F4 is considered to be the stable generation when selecting traits in plants?
- how does the moon make the tides? is it a gravity thing? if so, why is it not consistant?
- What is the typical dimensions of a typical feature on a modern integrated circuit?
- Brief description of what happens in a p-p collision(Jets, pT and missing Et in specific)?
- How do rashes target specific parts of the body?
- Why are equipotential lines perpendicular to electric field lines?
- How do we share 99% of our DNA with chimps, but only 50% of our DNA with our parents?
- When knocked out how does the body make sure it is always breathing and pumping blood?
- How do blind people dream?
- Was ash from the Mt St Helens eruption visible across the Pacific?
- Is there a reserve of animal DNA in case of exctinction?
- How exactly did lowering of the graphite parts of the control rods on Chernobyl's RBMK plant result in reactivity surge?
- How tall was the largest ever tsunami that we know of?
- Whenever I look at a pic taken from space, I can't help but notice the lack of stars. Can someone explain this phenomenon?
| If you are on the moon, does Earth appear to go through phases? Posted: 12 Jun 2019 01:14 PM PDT |
| Could an animal come back from extinction due to evolving? Posted: 12 Jun 2019 01:59 PM PDT There's been a post circulating reddit that says about a bird coming back from extinction die to evolution which has been said is fake but I'm wondering could it be possible that animals couple evolve back an extinct species (say the dodo for example) [link] [comments]  |
| Posted: 13 Jun 2019 04:04 AM PDT |
| Why does the continuous spectrum of a heated matter depend only on its temperature? Posted: 13 Jun 2019 02:58 AM PDT Any simple and intuitive explanation is appreciated. Thanks! [link] [comments]  |
| Medicine: What actually kills someone with cancer? Posted: 12 Jun 2019 10:58 PM PDT You often hear that someone "died of cancer", be it breast cancer, prostate cancer, melanoma or something else but what is it that actually kills them? Is it the immune system going havoc and killing all living cells it can find? Do you starve to death as the tumour grows and all nutrients you manage to ingest are seized by the cancerous cells? Infections, like pneumonia? [link] [comments]  |
| Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology Posted: 12 Jun 2019 08:14 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! [link] [comments]  |
| Why F4 is considered to be the stable generation when selecting traits in plants? Posted: 13 Jun 2019 02:40 AM PDT |
| how does the moon make the tides? is it a gravity thing? if so, why is it not consistant? Posted: 12 Jun 2019 11:51 PM PDT |
| What is the typical dimensions of a typical feature on a modern integrated circuit? Posted: 12 Jun 2019 11:25 PM PDT |
| Brief description of what happens in a p-p collision(Jets, pT and missing Et in specific)? Posted: 13 Jun 2019 03:24 AM PDT So I am undergrad student currently doing a Research Internship is Particle physics. I just want someone to help me understand what exactly happens when you detect Jets. So I understand how jets are formed due to hadronization. (Please correct if I am wrong anywhere). So consider a up quark and a down anti quark interacting to form a top and an anti-top pair which further decays to a b and W and b-bar and W pair. Now these b and b-bar quarks further decay and are detected as "JETS". What exactly are we trying to do with these jets? Are we trying to figure out what particles the jets are made of? Also about this whole "Missing Et" thing. I don't understand what it is. So consider a DY process generating a lepton pair. So from the data, I found out that when I plot a histogram of the invariant mass, I get a peak at around 91GeV/c^2, which indicates that the leptons were generated from a Z boson. What is the significance of the missing Et and Transverse momentum(pT) of the leading leptons to this particular fact? What do these two terms tell me about the decay? Thanks in advance! :) [link] [comments]  |
| How do rashes target specific parts of the body? Posted: 12 Jun 2019 10:26 AM PDT I came across Hand Foot and Mouth disease which results in rashes on the palms of the hands and feet.
I've always thought of rashes as being the result of a physical irritant, so you get the rash wherever the thing that causes it touches you, or it's in your bloodstream and you get breakouts pretty much all over. But this particular virus causes rashes in specific areas. How does it do that? And the claim I quote above suggests that most rashes don't happen on the palms of soles and feet, so why is that? How are these rashes able to target specific areas of the skin? [link] [comments]  |
| Why are equipotential lines perpendicular to electric field lines? Posted: 12 Jun 2019 09:57 PM PDT |
| How do we share 99% of our DNA with chimps, but only 50% of our DNA with our parents? Posted: 13 Jun 2019 01:42 AM PDT |
| When knocked out how does the body make sure it is always breathing and pumping blood? Posted: 13 Jun 2019 12:12 AM PDT Secondary question as well, when knocked out or unconscious is your body in a state of rest as if you fell asleep? Also does the body react in different ways due to the means of becoming unconscious? Such as being hit in the head vs. Not having air and passing out. [link] [comments]  |
| Posted: 12 Jun 2019 07:07 AM PDT I'm talking about people blind from birth. Can they have visualizations? And if so, how can we really confirm if they are "seeing"? I came across this article: https://www.google.com/amp/s/www.psychologytoday.com/au/blog/dream-factory/201712/do-blind-people-see-in-their-dreams%3famp Don't know how thorough was the study but if they're comparing to MRI's in fetuses I'm pretty sure a lot of hard work has gone into it. Website is psychology and not a journal of peer reviewed so here I am asking redditors. My big question is the following: If there are blind people from birth that are having visualizations (let's call it seeing) in their dreams, how can we prove they see the same as us by communicating with our other senses between blind person/non blind person? (By "same as us" I'm implying like a movie in front of us at eye level). There must be a technical word that encompasses what I'm trying to ask (or even a philosophical term most likely). [link] [comments]  |
| Was ash from the Mt St Helens eruption visible across the Pacific? Posted: 12 Jun 2019 11:21 PM PDT I'm a science teacher in Australia and one of my colleagues asked today if I remembered seeing ash in the air after the MSH eruption (I was 7 when it happened). I don't recall anything and I'm not sure MSH eruption was powerful enough (or vertical enough) to erupt ash at sufficient quantities to have a global effect. Can anyone give an outline of how far away particulates were visible? [link] [comments]  |
| Is there a reserve of animal DNA in case of exctinction? Posted: 12 Jun 2019 03:32 PM PDT I know there are reserves for diseases and plant seeds in case we need to repopulate certain species. Is there something similar for the DNA of endangered animals in case we need to clone an animal to revive it from extinction? [link] [comments]  |
| Posted: 12 Jun 2019 03:03 PM PDT There are many sources giving different data on the initial position and the dimensions of the rods, but most suggest that the absorber was located just outside the core when AZ-5 was pressed, and the displacer graphite was located roughly in the middle of the core. Then the control rod begun slowly lowering, as can be seen on this illustration. What happens next is puzzling, and I couldn't find a good explanation of it. According to the illustration, there are two reactivity decreasing zones (-), and only one reactivity increasing zone (+), the latter stemming from the graphite absorbing fewer neutrons than water while still lowering their speed. But this zone looks roughly equivalent to the second (-) zone, which is the inverse of it. So in order for this to lead to a positive reactivity surge, aka positive scram effect, aka end-rods effect, there should be a lot more of reactivity going on in the bottom of the core, but it seems that the opposite was the case; in fact, more neutron flux was recorded on the top (see the * line). So how did the surge take place? Could it be that a lot of xenon-135 accumulated in the middle section of the reactor, and the bottom was relatively free of it, allowing for an unchecked reactivity increase in the presence of the graphite? [link] [comments]  |
| How tall was the largest ever tsunami that we know of? Posted: 12 Jun 2019 12:33 PM PDT |
| Posted: 12 Jun 2019 10:18 AM PDT |
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