Did the plague doctor masks actually work? |
- Did the plague doctor masks actually work?
- Why do people say that when light passes through another object, like glass or water, it slows down and continues at a different angle, but scientists say light always moves at a constant speed no matter what?
- How common were dinosaurs?
- What's the difference between a free photon and photon as a force carrier?
- How much backup diesel fuel are nuclear power plants in the United States required to have? Days, weeks?
- When it comes to brain damage from trauma, especially issues regarding perception (hemispatial neglect, for example), can a subject in any case "force" themselves to accept that their senses are deceiving them?
- How does 5-HT1A Autoreceptors work and affect the Amygdala?
- Why are Uranium fuel pellets sintered?
- If they did, how ~2000 tested nuclear weapons from 1945s impacted global warming?
- Why does just about everything in space spin?
- What is a bose-einstein condensate?
- How fast can Humans go (Moving through space) and survive? Assuming we don't accelerate so fast it kills us? And how long would it take to get to light speed?
- Why do allergic reactions vary in severity? If the immune response kicks in, shouldn’t be an all or nothing response?
- Why does water temperature affect its taste?
- Is there such a thing as a "linked placebo" effect? For example, taking two drugs, then suddenly stopping one, but still receiving some of the effects of the other?
- Can a polarizer be turned on and off with electricity?
- How does the composition of the atmosphere vary with altitude, if at all? [Earth Science]
- What happens to major arteries which bring blood to extremities after an amputation?
- What purpose does the actually Uvula serve?
- Does a frog remember being a tadpole?
- Relative to its overall lifespan, is the sun an old star?
| Did the plague doctor masks actually work? Posted: 31 May 2019 07:38 PM PDT For those that don't know what I'm talking about, doctors used to wear these masks that had like a bird beak at the front with an air intake slit at the end, the idea being that germs couldn't make their way up the flute. I'm just wondering whether they were actually somewhat effective or was it just a misconception at the time? [link] [comments]  |
| Posted: 31 May 2019 01:33 AM PDT |
| Posted: 30 May 2019 09:56 PM PDT It sounds dumb but hear me out. In movies, we always see dinosaurs in a mass quantity, squished together and nearly on top of each other. But if we were to go back right now, how often would you see dinosaurs? What would be the density of dinosaur life? What modern day animal sightings could you compare dinosaurs with? I really hope this question makes sense, but I can elaborate more if I have to. Thanks! [link] [comments]  |
| What's the difference between a free photon and photon as a force carrier? Posted: 31 May 2019 08:27 AM PDT I want to understand how photons work. Apparently the light that flies through the void of space is made from photons. But the electromagnetic fields that surround us at all times, including our TV and WiFi and what have you, are also made of photons that carry interactions between charged particles. And somehow, in both cases photons are bosons, have no mass and no charge. I understand that by "light" we usually understand just its IR, visible and UV spectra, and that light and radio and gamma rays are actually all EM, just of different frequencies, but still, how does all that work? If light is made of photons, why doesn't light have charge? If electromagnetism is carried by photons, why don't they have charge? What's the difference between a photon of light that flew into my eye after being emitted by the Sun, and photon that carries my WiFi signal? [link] [comments]  |
| Posted: 31 May 2019 08:43 AM PDT So nuclear power plants have backup diesel generators when the plant has to shut down for any reason. I can't seem to find information on how long this fuel supply is supposed to last though. Surely there's a minimum amount set by law or something. [link] [comments]  |
| Posted: 31 May 2019 08:53 AM PDT For example, if I were to one day have a stroke that led me to suspect that my wife had been replaced by an impostor, would I be doomed to believe it, or would I be capable of rationalizing that something had gone wrong inside my head, even though it might feel like she's been replaced? [link] [comments]  |
| How does 5-HT1A Autoreceptors work and affect the Amygdala? Posted: 31 May 2019 08:34 AM PDT Hi, Is anybody familiar with 5-HT1A auto-receptor? I'm struggling to understand the function of it as an autoreceptor. I understand that it regulates 5-HT but I'm not sure what is the mechanism. Does it bind to the 5-HT that the neurons release and further release lesser 5-HT? I would then assume that more 5-HT1A autoreceptor = low levels of serotonin. Is that right? Thus, according to this paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2736132/ how does 5-HT1A affect amygdala reactivity? The paper suggests that more 5-HT1A autoreceptors = low amygdala reactivity = low anxiety. However, if 5-HT1A releases lesser serotonin, wouldn't lesser serotonin levels lead to high levels of anxiety? Apologies if I'm confusing everybody, but this is my very naive current understanding of 5-HT1A autoreceptors. I really wish to understand this receptor and mechanism. Thank you all. [link] [comments]  |
| Why are Uranium fuel pellets sintered? Posted: 31 May 2019 08:32 AM PDT I've been trying to educate myself on nuclear tech, and seeing that most fuel rods are pulled with around 90%+ good fuel due to contamination from waste products got me looking into the fuel. I tried good ol' Google but I'm really struggling with this one. Has anyone used fuel rods/pellets made from a grown single crystal rather than sintered? I'm trying to determine how that structure would retain/reject fission products vs the sintered pellet. [link] [comments]  |
| If they did, how ~2000 tested nuclear weapons from 1945s impacted global warming? Posted: 31 May 2019 05:42 AM PDT |
| Why does just about everything in space spin? Posted: 30 May 2019 07:22 PM PDT Galaxies, black holes, planets, solar systems, and stars rotate. Why? And while I'm at it, why does stuff wind up orbiting stuff, instead of just flinging past each other or colliding already? [link] [comments]  |
| What is a bose-einstein condensate? Posted: 30 May 2019 09:47 PM PDT I've long since wanted to know what a bose-einstein condensate is but even after looking it up several times (I've wanted to know for a long time) I still have no clue. I just can't wrap my mind around it. I can't visualize it and even after trying google images, I just find graphs and unrelated stuff. Like plasma, and PLEASE correct me if I'm wrong, I imagine as a sort of goop or runny slime consistency but generally in a ball. Also, I know it's a superfluid, does that also make it a fluid? Is a superfluid just a sub-category of fluid? Please help. [link] [comments]  |
| Posted: 30 May 2019 10:28 PM PDT |
| Posted: 31 May 2019 12:09 PM PDT |
| Why does water temperature affect its taste? Posted: 31 May 2019 12:08 PM PDT |
| Posted: 31 May 2019 11:55 AM PDT So say you take allergy pills, and they have caffeine in them. Is there any evidence that, if you were to stop taking the pills, but continue taking a similar amount of caffeine, you could get some of the other effects of the pills? Even if that exact example doesn't work, are there others that do? [link] [comments]  |
| Can a polarizer be turned on and off with electricity? Posted: 31 May 2019 02:14 AM PDT |
| How does the composition of the atmosphere vary with altitude, if at all? [Earth Science] Posted: 31 May 2019 09:24 AM PDT |
| What happens to major arteries which bring blood to extremities after an amputation? Posted: 31 May 2019 08:57 AM PDT The femoral artery is a large artery that supplies the legs. What happens to it after the leg is amputated? What do surgeons do with this artery, tie it back into the return vein, or tie it off and let new vessels form? What happens to the circulatory system after an amputation, does its overall efficiency increase because blood has to travel less distance, or does it get negatively impacted because the oxygen is not being fully used but instead traveling in the return vein without being used? [link] [comments]  |
| What purpose does the actually Uvula serve? Posted: 30 May 2019 10:13 PM PDT |
| Does a frog remember being a tadpole? Posted: 30 May 2019 06:29 PM PDT I recently watched a video simulating tadpoles growing into frogs, which got me wondering if the memory capacity of a frog is strong enough to really understand the freedom it now has with its legs or if it forgets it's time swimming about. [link] [comments]  |
| Relative to its overall lifespan, is the sun an old star? Posted: 30 May 2019 10:45 PM PDT |
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