Why do materials like some metals with lower heat capacities than water, require so much more heat to liquify? |
- Why do materials like some metals with lower heat capacities than water, require so much more heat to liquify?
- Any recent data that shows the difference in mortality or severity of people who took flu shot vs not?
- Ask Anything Wednesday - Engineering, Mathematics, Computer Science
- How does flour transform when you fry something?
- Does acid (specifically Hydrochloric acid) become less reactive if it is old?
- How much of the planet was covered in forest before humans, and how much is covered in forest now?
- Is there a difference between emitted fluorescent photons under different absorption regimes?
- Are animals' facial expressions representative of their mood or do humans just interpret them that way?
- Why is 1^∞ indeterminate? Shouldn't the answer always be 1, no matter the exponent?
- With all the epoxy-ing going on (countertops, tables, lamps...) How long does epoxy take to decompose?
- Is the earth getting heavier or lighter?
- How does one "ping" to a server?
- Why would a generator that takes advantage of raising and lowering tides not be considered a perpetual motion machine?
- How do those quick electronic germ tests work and what exactly do they measure?
- Assuming a spherical projectile with no spin, but WITH air resistance, does a projectile thrown in the air still follow a parabola? If not, are there equations that can model the shape?
- Does copper IUD stop implantation of a fertilized egg?
- Are gut microbiota and autism related and if so how?
- How scientists keep anti-matter atoms from touching matter atoms?
- Do all Planets in Planetary systems allign occasionally?
- How does caffeine reach the liver?
| Posted: 11 Feb 2020 05:33 PM PST |
| Posted: 12 Feb 2020 07:06 AM PST You hear all the time that even though I got a flu shot, I still got flu. I mean yeah flu shot is not 100% protective against flu. I was wondering if the flu shot 1) decreases the severity of the flu - if yes, in what way (number of days or severity of symptoms ? 2) Mortality rate of people with flu shot vs placebo. Recent data would be appreciated. On a side note, why do some young healthy people die of flu and some older people with other illnesses don't? [link] [comments]  |
| Ask Anything Wednesday - Engineering, Mathematics, Computer Science Posted: 12 Feb 2020 07:08 AM PST Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Engineering, Mathematics, Computer 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 does flour transform when you fry something? Posted: 12 Feb 2020 06:47 AM PST First, flour is a powder, then when you mix it with water, it becomes a soft dough like substance. When you fry that, you get this crispy solid. What are the inner chemical or physical changes happening? [link] [comments]  |
| Does acid (specifically Hydrochloric acid) become less reactive if it is old? Posted: 12 Feb 2020 06:29 AM PST Ok so basically I just finished doing an experiment about how the surface area of magnesium affects the rate of reaction with hydrochloric acid. We used a concentration of 1mol/dm3 for our tests. Our reaction was extremely un-reactive. We were confused but continued on using the same acid. We did this over the span of about three days using the exact same acid every day (as it was kept in a glass container). However near the end of our last day we ran out of that specific jar of acid. We used another one with the same concentration and the reaction was very reactive. I am now doing my evaluation, is it possible that the acid we used for most of the experiment was old and therefore non-reactive? Any responses are appreciated thank you! [link] [comments]  |
| How much of the planet was covered in forest before humans, and how much is covered in forest now? Posted: 11 Feb 2020 03:04 PM PST Or how much was covered before we began harvesting trees heavily - I'm assuming this began around the industrial revolution. [link] [comments]  |
| Is there a difference between emitted fluorescent photons under different absorption regimes? Posted: 11 Feb 2020 02:42 PM PST This is probably a poorly worded question, but that's part of what led me here instead of being able to find a paper for this. If I want to consider an emitted fluorescent photon, is there a difference if that fluorescent photon was created through a one photon absorption or a two photon absorption? I know 1PA and 2PA have different selection rules for electronic state transitions, but does this translate into any measurable difference in the subsequently emitted photon? If possible, could you also point me towards any sources so I can read up on this topic? Thank you in advance [link] [comments]  |
| Posted: 11 Feb 2020 12:04 PM PST If an animal appears to be smiling, is it actually happy or is it's face just doing that? For some types of expression, I imagine the answer is obviously yes. If a tiger is bearing it's teeth at you and hissing, it is pretty clear that it is demonstrating that it is aggressive. But for expressions like happiness, worry, fear, relaxedness and the like, is that actually how the animal is feeling or do humans just assign human emotions to vaguely similar expressions on animals? [link] [comments]  |
| Why is 1^∞ indeterminate? Shouldn't the answer always be 1, no matter the exponent? Posted: 11 Feb 2020 06:46 PM PST |
| Posted: 11 Feb 2020 02:29 PM PST Is the decomposition time the same as common plastics? [link] [comments]  |
| Is the earth getting heavier or lighter? Posted: 11 Feb 2020 01:32 PM PST With gases reaching the upper atmosphere and being picked off by solar winds, trips to the cosmos leaving space junk and stuff falling to earth from space is earth at a net gain or loss of mass year on year? [link] [comments]  |
| How does one "ping" to a server? Posted: 11 Feb 2020 12:02 PM PST I hear everyone talk about ping all the time and I always wonder what is happening actually when im getting lets say 32 ms to NA East. Is that how fast it takes to get to a server? [link] [comments]  |
| Posted: 11 Feb 2020 08:04 PM PST |
| How do those quick electronic germ tests work and what exactly do they measure? Posted: 11 Feb 2020 11:18 AM PST Like the ones seen being used in those articles about how poor hygene on planes contributes to the propagation of the coronavirus. [link] [comments]  |
| Posted: 11 Feb 2020 06:37 PM PST |
| Does copper IUD stop implantation of a fertilized egg? Posted: 11 Feb 2020 06:51 AM PST For example, inserting a copper IUD when the egg is already fertilized with a sperm. Will the copper IUD stop the implantation to the uterus and therefore stop pregnancy? [link] [comments]  |
| Are gut microbiota and autism related and if so how? Posted: 11 Feb 2020 04:29 PM PST |
| How scientists keep anti-matter atoms from touching matter atoms? Posted: 11 Feb 2020 03:39 PM PST As far as I know, scientists in CERN managed to create anti-hydrogen atoms and observe it for seconds. How do they do it since anti-matter and matter cause an explosion when they contact? [link] [comments]  |
| Do all Planets in Planetary systems allign occasionally? Posted: 11 Feb 2020 09:12 AM PST It won't happen in our Solar system again before May 6, 2492, or at least come close to if my understanding is right. But a question I can't stop running in to, is whether or not this is a thing that is bound to happen in any Planetary System? It's probably just a Mathmatical question in all honesty. Do points (in elliptical orbits), when placed at random distances with different velocities, relative to a fixed center, always end up 'somewhat' alligned when given enough time? I realize that this period of time might vary exponentially the more planets there are added, and the velocities they are moving at. But ignoring the consequenses of speed and time, is this a true statement by any means? [link] [comments]  |
| How does caffeine reach the liver? Posted: 11 Feb 2020 10:55 AM PST Caffeine is metabolized predominantly by CYP1A2 in the liver; however, since caffeine is nearly 100% bioavailable and does not undergo significant first-pass metabolism by the liver, how and at what point does it reach the liver? [link] [comments]  |
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