At what frequency can human eye detect flashes? Big argument in our lab.

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• At what frequency can human eye detect flashes? Big argument in our lab.
• What changes occur in babies skin between 5 and 6 months that allow for the use of sunscreen?
• Can the human ear adjust to volume?
• How do bugs become fossils by being trapped in amber? Cant other small animals can be fossils the same way?
• Do people with retrograde amnesia usually immediately realize their memories are missing?
• How long after clinical death, can someone be revived?
• Ask Anything Wednesday - Engineering, Mathematics, Computer Science
• Is it possible to predict a chemical reaction without carrying out experiment?
• How do electric eels work when they discharge shocks ?
• How far apart are stars on average in our galaxy?
• Why do shape memory alloys go back to their set shape after being heated?
• Is the Earth's crust constantly getting thicker?
• How common is diverticulus as a leading cause of death or injury in herbivores that eat all day (like elephants or cows or horses)? What about pandas?
• Can alpha / beta decay occur without also emitting a gamma ray?
• If one were to take an elevator through the center of the earth (while ignoring the lethal heat of course) would the earth’s gravitational pull on the riders decrease gradually as the elevator descended? Or would the gravity remain the same until you reached the core?
• What is the use of bronchoconstriction?
• Does every moon have "Dark" side?
• What determines the size of raindrops?
• What species of animals and plants would have lived in the South of Pangaea?
• Why we call Cranial Diabetes Insipidus a type of "Diabetes" ?
• What happens when you superimpose two coherent, out-of-phase beams of light?
• Is titanium carbonitride conductive?

At what frequency can human eye detect flashes? Big argument in our lab. Posted: 07 May 2019 07:47 PM PDT I'm working on a paddlewheel to measure water velocity in an educational flume. I'm an old dude, but can easily count 4 Hz, colleagues say they can't. https://emriver.com/models/emflume1/ submitted by /u/gravelbar [link] [comments]

What changes occur in babies skin between 5 and 6 months that allow for the use of sunscreen? Posted: 07 May 2019 08:10 PM PDT The go-to rule for sunscreen for babies is 6 months due to the their skin being thin and the surface area ratio for chemicals. What happens at 6 months to make it acceptable to use sunscreen? Is waiting until 6 months even necessary? submitted by /u/rigidtoucan123 [link] [comments]

Can the human ear adjust to volume? Posted: 07 May 2019 08:20 PM PDT I've noticed that without changing the volume, I can go from barely hearing the tv to it being too loud. For example, I had to turn it to 15 (loud for our tv) to hear it at first, but after watching for a few minutes I was able to hear it fine at volume 3. submitted by /u/Fireyshotguns51 [link] [comments]

How do bugs become fossils by being trapped in amber? Cant other small animals can be fossils the same way? Posted: 08 May 2019 03:59 AM PDT submitted by /u/gobusspy [link] [comments]

Do people with retrograde amnesia usually immediately realize their memories are missing? Posted: 08 May 2019 03:41 AM PDT This is something I've pondered for a while. For the record, I'm mostly talking about amnesia as an isolated condition, not like resulting from Alzheimer's or dementia, since it's pretty apparent in those cases that they don't often realize that there are some holes in their memory until someone brings it to their attention; at least, that seems to be the case as far as I'm aware. It's something I've wondered about, because in modern fiction, amnesia is a really popular trope, and I often notice that characters with amnesia tend to almost immediately realize that memories that should be there are missing without much external input or something prompting them to realize that's the case. Like, indulge me in my video game hobby for a second. In the game Megaman ZX Advent for example, one of the protagonists you can play as, Grey, is a supposed amnesiac, and as soon as he's awoken from a stasis pod, he immediately exclaims something to the effect of "Where am I? Who am I? I can't remember anything", without any external input, unlike say, Fire Emblem Awakening where the amnesiac protagonist Robin realizes that he's missing memories after being interrogated by other characters, and realizing he doesn't remember things like his name or where he came from. Would it be like in Grey's case, where you just immediately realize that you can't remember anything, or would you more typically be blissfully unaware that you're missing memories until something brings it to your attention? Or is it like a mixed bag where it is usually wildly different on a case-by-case basis? submitted by /u/CurseOfMyth [link] [comments]

How long after clinical death, can someone be revived? Posted: 07 May 2019 09:16 PM PDT How long without damage to the body (brain, heart, etc.)? And how long before being unable to keep yourself alive (breathing by yourself, without help)? submitted by /u/ijzendoorn [link] [comments]

Ask Anything Wednesday - Engineering, Mathematics, Computer Science Posted: 08 May 2019 08:12 AM PDT 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! submitted by /u/AutoModerator [link] [comments]

Is it possible to predict a chemical reaction without carrying out experiment? Posted: 08 May 2019 04:14 AM PDT I wonder if there are anyway to step by step calculate a reaction, like from redox ,forming of bonds, when does a molecule got broken down etc. to find out the products submitted by /u/PhilipP_Reddit [link] [comments]

How do electric eels work when they discharge shocks ? Posted: 08 May 2019 03:59 AM PDT I saw a gif where a guy touches an electric eel and gets shocked. I was wondering how badly you can get shocked and how does it really work ? submitted by /u/brtaleb [link] [comments]

How far apart are stars on average in our galaxy? Posted: 07 May 2019 06:40 PM PDT So I did some calculations. Apparently there's 100-200 billion. But the Milky Way is only 100,000 light years across. Doing some math that means there's about a million stars per light year. That seems a bit cramped? submitted by /u/Jacob_wallace [link] [comments]

Why do shape memory alloys go back to their set shape after being heated? Posted: 07 May 2019 07:27 PM PDT submitted by /u/G_Shred [link] [comments]

Is the Earth's crust constantly getting thicker? Posted: 08 May 2019 05:51 AM PDT I was wondering if the Earth's crust is constantly getting thicker as a result of organic matter adding to the topsoil, and eventually becoming sedimentary rock - or is there a cyclical process going on somewhere perhaps involving the mantle? submitted by /u/spasmos [link] [comments]

How common is diverticulus as a leading cause of death or injury in herbivores that eat all day (like elephants or cows or horses)? What about pandas? Posted: 07 May 2019 09:31 PM PDT If horses eat too much hay, are the at risk of straining their intestines? submitted by /u/inquilinekea [link] [comments]

Can alpha / beta decay occur without also emitting a gamma ray? Posted: 08 May 2019 01:11 AM PDT I know that you can't have (or very rare to find) just gamma rays, but can you have just alpha or just beta particles emitted in radioactive decay? Couldn't find anything helpful on google. submitted by /u/Kish_v [link] [comments]

If one were to take an elevator through the center of the earth (while ignoring the lethal heat of course) would the earth’s gravitational pull on the riders decrease gradually as the elevator descended? Or would the gravity remain the same until you reached the core? Posted: 07 May 2019 10:20 PM PDT submitted by /u/Axxalon [link] [comments]

What is the use of bronchoconstriction? Posted: 08 May 2019 12:03 AM PDT I understand that our bodies relax the muscle behind the trachea (bronchodilation) in order to widen the air passageway and breathe more easily. But why would our bodies go out of their way and use energy to contract that muscle and make breathing harder? submitted by /u/impostorbot [link] [comments]

Does every moon have "Dark" side? Posted: 07 May 2019 09:39 PM PDT I know we can see only one side of our moon ( and calling it "dark" is not correct). But does it apply to every planet? submitted by /u/bahaEpic [link] [comments]

What determines the size of raindrops? Posted: 07 May 2019 12:39 PM PDT submitted by /u/Superseismitoad [link] [comments]

What species of animals and plants would have lived in the South of Pangaea? Posted: 08 May 2019 02:23 AM PDT I would like to know what lifeforms would have survived the cold/harsh climate of South-Eastern Pangaea, namely the Australian continent. submitted by /u/haha_long_boi [link] [comments]

Why we call Cranial Diabetes Insipidus a type of "Diabetes" ? Posted: 08 May 2019 01:14 AM PDT What Diabetes actually means ? submitted by /u/thetechlyone [link] [comments]

What happens when you superimpose two coherent, out-of-phase beams of light? Posted: 07 May 2019 01:52 PM PDT What initially got me thinking was seeing this question over on r/explainlikeimfive about the general nature of destructive interference and the conservation of energy. The basic examples are all pretty clear to me (Interference pattern in the double slit experiment? The bright parts contain the energy that the dark parts are missing. Shining two lasers against each other? They produce a standing wave.) But I came up with a scenario where I cannot simply come up with a solution as to where the energy goes: ​ E | | E--M==== With E being the emitters of a single coherent beam of light each, M being a semi-transparent mirror and = being the superposition of the two laser beams (I'm ignoring the part of the light that will go in a downwards direction for ease of "drawing", though it should be completely analogous to the light going to the right). If you control for polarisation and phase shift at the emitters, = could be made to be of of the form sin(t) + sin(t+pi), which is constantly equal to 0. There is clearly energy going into M, yet it seems like destructive interference should completely negate any outgoing energy. Which is obviously impossible. Does the mirror simply heat up? If so: How? What are the exact mechanics involved? Or am I missing something else? ​ ​ Edit: Typo. submitted by /u/EntropyZer0 [link] [comments]

Is titanium carbonitride conductive? Posted: 07 May 2019 05:29 PM PDT No right? submitted by /u/kayonetheus [link] [comments]

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