Why isn't serotonin able to cross the blood-brain barrier when molecules like psilocin and DMT can, even though they're almost exactly the same molecule? |
- Why isn't serotonin able to cross the blood-brain barrier when molecules like psilocin and DMT can, even though they're almost exactly the same molecule?
- Is constant light exposure beneficial to plants, or do they also require periods of low light?
- If experts can tell me I shouldn't leave my phone connected to the charger after it's charged, and my phone can detect and tell me when it's charged, why can't the phone just go ahead and turn off the charging when it's charged?
- How does a computer determine if a given number is larger than another number?
- Is something only warm to the touch, i.e I touch with my finger, if that object is warmer than my body temperature? Or at what temp does something become warm to touch, considering when run roughly 37 C/98.6F?
- How do Ampere's law and Faraday's law make sense conceptually? How does an electric field emerge from a changing magnetic field and how does a magnetic field emerge from a changing electric field?
- When two black holes merge, the new black hole has the angular momentum of both. Does this put a limit on the size of black holes? How fast can a black hole spin?
- In regards to ionic radius, how do you compare cations to anions of different elements that are not isoelectric?
- Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology
- Is it possible to (easily) calculate the private key of any modern encription technique if I know the exact content of one encripted file? If so, how long must that file be?
- It's QWERTY measurably better for swipe typing than other layouts used for touch typing?
- Does gasoline become "stale" when stored for a long period? If so, what is happening, chemically? Are additives sold to prevent this from happening effective?
- Why is the Heliopause directional as if all the galactic cosmic rays come from one location?
- Hubble Ultra Deep Field galaxies: Are they named/studied?
- How does a strong acid/base harm living cells?
- What does the search for an alternative chemical look like?
- Is there a relation between wavelength of radiation absorbed by a surface and its surface roughness?
- Is it possible for a solar system to have two planets of the same size within the habitable (Goldilocks) zone?
- How does kinetic energy make sense from different inertial systems?
- Why does most (if not all) life use phosphoanhydride bonds (ATP) as energy storage/currency when Phosphorous is limited in the environment?
Posted: 05 Nov 2019 01:13 PM PST Even LSD which is quite a bit larger than all the molecules I mentioned, is able to cross the blood-brain barrier with no problem, and serotonin can't. [link] [comments] |
Is constant light exposure beneficial to plants, or do they also require periods of low light? Posted: 05 Nov 2019 12:45 PM PST |
Posted: 05 Nov 2019 10:34 AM PST I'm just not sure why it's down to me to unplug it. Can't it just flip a relay when it gets to 100 percent, or 80 percent, or what's considered healthy for the battery? [link] [comments] |
How does a computer determine if a given number is larger than another number? Posted: 06 Nov 2019 03:10 AM PST |
Posted: 06 Nov 2019 06:59 AM PST |
Posted: 05 Nov 2019 10:56 PM PST Ampere's law states that a changing electric field produces a magnetic field and Faraday's law states that a changing magnetic field produces an electric field. I can understand how they make sense mathematically (using the different vector theorems) but how do they make sense conceptually? How did Ampere come to the conclusion that a magnetic field is produced from a changing electric field and how did Faraday come up with the fact that an electric field is produced from a changing magnetic field? What made them realize and form these laws other than mathematics? [link] [comments] |
Posted: 06 Nov 2019 04:37 AM PST Or am I misunderstanding how their angular momentum is combined? If so, does anything else limit the size of a black hole -- could one, in theory, eat everything in the universe? [link] [comments] |
Posted: 06 Nov 2019 07:33 AM PST So I know the basics But what if they are two different elements of different charge say Br- and In+ [link] [comments] |
Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology Posted: 06 Nov 2019 07:08 AM PST Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Economics, Political Science, Linguistics, Anthropology 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] |
Posted: 06 Nov 2019 06:06 AM PST |
It's QWERTY measurably better for swipe typing than other layouts used for touch typing? Posted: 06 Nov 2019 03:52 AM PST QWERTY was designed to have the most common letters far apart to prevent typewriters from jamming. Most other keyboard layouts used for touch typing (Dvorak, Colemak, …) were designed to have the most common letters on the home row, so they are under the fingers. If QWERTY has the most common letters apart, it may cause the paths of the finger to be spread more evenly over the keyboard and give more information so the prediction algorithm. [link] [comments] |
Posted: 06 Nov 2019 12:34 AM PST |
Why is the Heliopause directional as if all the galactic cosmic rays come from one location? Posted: 05 Nov 2019 04:46 PM PST Recently, reading articles about the Voyager spacecraft, illustrations all show the Heliosphere trailing off in one direction. I would expect cosmic rays to be coming from stars and galaxies all over the universe instead of from just from one location. [link] [comments] |
Hubble Ultra Deep Field galaxies: Are they named/studied? Posted: 05 Nov 2019 03:20 PM PST I've been looking at this HUDF picture: If I had questions about some specific galaxy in that picture, are any of them named and how much information should I expect to get from a given galaxy? How much can we learn about them based on just a photograph? Also if anyone has any further information on the morphology of galaxies I'd appreciate the insight. [link] [comments] |
How does a strong acid/base harm living cells? Posted: 05 Nov 2019 12:56 PM PST From humans to single-celled Archaea, how does very low pH harm cells? What is the chemical process? [link] [comments] |
What does the search for an alternative chemical look like? Posted: 05 Nov 2019 09:12 AM PST The crux of the recent story about the UK engineer and his aluminum air battery was that such batteries have been known for a long time, but required a toxic corrosive electrolyte, so his breakthrough (that he spent two decades searching for) is an alternative electrolyte that works for the battery and is harmless enough to drink. My question is, **when any chemist is searching for a replacement chemical like this, what guides the search?** Is it things like number of valence electrons, molecular mass, bond length simulations, or what? [link] [comments] |
Is there a relation between wavelength of radiation absorbed by a surface and its surface roughness? Posted: 05 Nov 2019 09:40 AM PST Are all wavelengths equally absorbed by a surface, or is a specific wavelength more prominently absorbed depending on the surface roughness? [link] [comments] |
Posted: 05 Nov 2019 09:24 AM PST I'm reading some science fiction where two earth-like planets of the same size are only slightly outside of each other's orbit, and have similar orbital periods. So similar life forms move back and forth between each planet. I wasn't sure if this is possible. Would the two planets just collide? [link] [comments] |
How does kinetic energy make sense from different inertial systems? Posted: 05 Nov 2019 01:53 PM PST A friend and I have trouble making sense of a very basic fact of Newtonian Physics. Kinetic energy grows quadratically with velocity. This made sense to me until my friend suggested the following thought experiment: 3 bodies A, B and C rest next to each other not affected by any forces. A stays still while B and C accelerate to, say, 10 m/s, gaining an amount of kinetic energy x. In respect to each other, B and C are not moving. Now C accelerates to 20 m/s relative to A and 10 m/s relative to B. This increases C's kinetic energy to 4x. From B's perspective, this looks like an acceleration from 0 to 10 m/s but required 3x energy. It seems like A's perspective is "more correct" than B's, but why? If velocity is always measured relative to an inertial system, why is kinetic energy not? Where are my friend and I messing things up? [link] [comments] |
Posted: 05 Nov 2019 06:43 AM PST Is there any advantage to ATP and other phosphoanhydride bonds that seem to do most of the heavy lifting in the cells that other molecules just cannot do at all? It would seem that some other kind of energy currency would compete at all if there were comparable efficiencies and traits. [link] [comments] |
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