Why does flu even come in seasons? |
- Why does flu even come in seasons?
- Any news about the antibodies created when infected with the new Omicron variant? Since it has multiple mutations, are the natural antibodies from Omicron effective in fighting the earlier variants?
- How can Neuropathy (Nerve Damage) cause Numbness is Some but Pain in Others?
- Does taking mock tests increase mental stamina?
- How does a computer communicate with another one behind NAT?
- How do limpets metabolize iron for their super-hard teeth?
- Why does a Pfizer booster protect against omicron when the first two doses don’t?
- If Photons Carry Momentum Despite Having No Mass, Does the Sun's Output Move Planets' Orbits?
- Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science
- How would you slow down a lightsail?
- If I shoot a jet of water at an object, it will have less force if the object is already moving away from me, due to relative velocity. What if the thing I'm shooting is light? Will it get the same force regardless of the relative velocity?
- Is there dark matter in our galaxy or even solar system?
- What effects does radiation have on silver?
- Does Jupiter not technically orbiting the sun also make it not a planet?
- Could we take a picture of JWST with Hubble?
- Does Covid-19 vaccine help protect against Covid pneumonia?
| Why does flu even come in seasons? Posted: 08 Dec 2021 08:04 AM PST |
| Posted: 08 Dec 2021 07:56 AM PST |
| How can Neuropathy (Nerve Damage) cause Numbness is Some but Pain in Others? Posted: 08 Dec 2021 07:41 AM PST I was curious how neuropathy of a sensory nerve can result in both numbness and/or pain the area they effect. How can it cause both of these symptoms? Is this due to anatomical variations between people, differences in how the nerve damage occurs, similarities in how these two sensations are transmitted, or some other factor? I am not a medical student, however I am a masters student so I do have some background knowledge of anatomy/physiology (though my neurology knowledge is a bit poor) so I can understand general terminology. I'd appreciate if anyone could explain this! Edit: Thank you everyone for the responses! I wanted to elaborate what i meant a little further. I am primarily referring to reversible nerve damage more so than irreversible. "Neuropathy" may have been the wrong term. Also, I know that nerves differentiate based on sensory/motor function. What I was curious about is why does damage to sensory nerves result sometimes in pain but other times numbness. [link] [comments] |
| Does taking mock tests increase mental stamina? Posted: 08 Dec 2021 02:01 PM PST I help students prepare for the SAT and ACT. Lots of blog posts from tutoring companies advocate for students taking mock tests to help increase their mental stamina for the real exam. I haven't seen any of these posts cite sources for the premise that you build mental stamina by taking long tests regularly. Is there any scientific evidence that taking long tests boosts mental stamina? Or are there better ways to help students increase their ability to focus during a 4 hour exam? [link] [comments] |
| How does a computer communicate with another one behind NAT? Posted: 07 Dec 2021 11:05 PM PST I was learning about NAT and I think I understand how it works. You have a private IP. When you send a request to a computer on another network, the router changes the packet's source address so that the router receives the response, and then it forwards the response back to you ("you" being another computer). But this only happens when you initially send a request. How does a computer on a different network send you a packet if you didn't send it a request first? Assuming you are not the only device connected to your network, and it can't just send a packet to your private IP address, how can this communication occur? [link] [comments] |
| How do limpets metabolize iron for their super-hard teeth? Posted: 08 Dec 2021 01:05 AM PST Limpet teeth are made of goethite crystals mixed with chitin. This makes them ridiculously strong and durable - a diamond saw was required to cut one, and they are, as of right now, the strongest biomaterial known to exist - but that's besides the point: How, specifically, do limpets metabolize the iron they put into these teeth? What metabolic or chemical pathways do they use for this? How in the absolute dickens can an animal digest rock? [link] [comments] |
| Why does a Pfizer booster protect against omicron when the first two doses don’t? Posted: 08 Dec 2021 06:41 AM PST |
| If Photons Carry Momentum Despite Having No Mass, Does the Sun's Output Move Planets' Orbits? Posted: 07 Dec 2021 05:57 PM PST The sun outputs countless amounts of photons that all collide with planets. These photons obviously carry energy and get expelled as heat or can be harvested as energy, but they also carry momentum. Even if only a tiny amount, do these photons push on planets and move their orbits? [link] [comments] |
| Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science Posted: 08 Dec 2021 07:00 AM PST 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] |
| How would you slow down a lightsail? Posted: 08 Dec 2021 01:57 PM PST When it comes to interstellar travel the topic of lightsails (a small craft, usually a probe, propelled by multiple powerful lasers and able to achieve extremely high speeds) has often surfaced as a possible way to reach neighboring stars. Some articles I've read on it mention reaching Alpha Centauri in about 20 years which would mean if I'm not mistaken 20-25% of light-speed. My question about this is whether we'd be able to slow down such a probe when reaching the destination, and if not whether we could still make any use of it. With no drag in space and the propelling light source coming from the Solar system, I see no way that we could slow down the craft when approaching the target system. And at 20% of light-speed the window to collect data or pictures in the target system would be extremely short, so is this a viable option to explore (even if just with probes) even without solving the slowing down issue? [link] [comments] |
| Posted: 08 Dec 2021 12:59 PM PST Relativity says that light travels at the speed of light relative to you, no matter who you are - this answers the "if my car is traveling at 0.99c and i turn on the headlights, how fast does the light come out", and the answer is c relative to me, but also c relative to an external observer. Because light is weird. Say I have a light sail moving away from me at 0.5c. Will the light come hit it at a velocity of c, and thus impart the same force it would as if the sail was at rest relative to me? [link] [comments] |
| Is there dark matter in our galaxy or even solar system? Posted: 07 Dec 2021 09:44 PM PST If dark matter is everywhere it stands to reason that it is also in our galaxy, possibly in our solar system and even near or on planet Earth. [link] [comments] |
| What effects does radiation have on silver? Posted: 08 Dec 2021 07:17 AM PST |
| Does Jupiter not technically orbiting the sun also make it not a planet? Posted: 08 Dec 2021 06:42 AM PST According to everything I've read, the barycenter of the sun and jupiter is a point outside the surface of the sun due to Jupiter having extremely large amount of mass. Does the IAU definition take into account planets that "orbit" the sun but have actual orbits that are points outside the sun, or does that kind of technicality not really matter? [link] [comments] |
| Could we take a picture of JWST with Hubble? Posted: 07 Dec 2021 04:57 PM PST |
| Does Covid-19 vaccine help protect against Covid pneumonia? Posted: 08 Dec 2021 07:52 AM PST Last year I was in the hospital from pneumonia in both lungs from Covid. I am vaccinated and am getting the booster today. But what I am worried about is catching pneumonia if I do get Covid again. I read this article https://www.nbcnews.com/news/amp/ncna1247576 and it says "In an international study in Science, 10 percent of nearly 1,000 Covid-19 patients who developed life-threatening pneumonia had antibodies that disable key immune system proteins called interferons. These antibodies — known as autoantibodies, because they attack the body itself — weren't found at all in 663 people with mild or asymptomatic Covid-19 infections. Only four of 1,227 healthy patients had the autoantibodies. The study was led by the Covid Human Genetic Effort, which includes 200 research centers in 40 countries." So even if I have the vaccine is it going to protect me from pneumonia even though I may have the problem mentioned in the article? [link] [comments] |
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