AskScience AMA Series: I'm Brian Greene, theoretical physicist, mathematician, and string theorist, and co-founder of the World Science Festival. AMA!

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• AskScience AMA Series: I'm Brian Greene, theoretical physicist, mathematician, and string theorist, and co-founder of the World Science Festival. AMA!
• Is there any amount of turbulence which could bring a plane down?
• Why is there so little neon in Earth's atmosphere?
• Why doesn't the CDC provided Oligonucleotide Sequences provided for Covid-19 testing match any sub-sequences provided in the updated published Covid-19 genome (version 2)?
• Starting today, and continuing every day for an infinite number of days, I will add one kilogram of iron to a large heap of iron. Will my heap eventually collapse into a black hole? Or is the shock of the supernova also needed?
• How fast does the humoral immune response occur (after becoming immune)?
• How do you cut a pizza into 7 equal slices using only parallel cuts?
• Is dark matter a byproduct of the expansion of the universe, I.E the thing dark energy leaves behind after expanding into empty space?
• Is it possible to make sodium metal from NaOCl?
• Is there research that shows that the absence of certain physical stressors that were present in distant past and experienced by our ancestors can worsen brain function and create mental health issues like depression?
• What causes the effect of trenchfoot?
• What are some ways we determine what asteroids are made of?
• Which instruments do they use to observe photons or electrons in the double slit experiment?
• Does the Earth's rotation create centripetal force against everything on it's surface? If so does that mean we aren't experiencing gravity as strong as it should be?
• Do galaxies regularly "disappear" from the edge of the observable Universe due to the ever expanding nature of space?
• Why are Boron and Aluminum in column 13 of periodic table instead of 3?
• What is the scientific term for the amount of current/electricity a material can endure before being destroyed/melting?
• What does the "hand" part of the motor homunculus map refer to?

AskScience AMA Series: I'm Brian Greene, theoretical physicist, mathematician, and string theorist, and co-founder of the World Science Festival. AMA! Posted: 26 May 2020 04:00 AM PDT I'm Brian Greene, professor of physics and mathematics at Columbia University and the Director of the university's Center of Theoretical Physics. I am also the co-founder of the World Science Festival, an organization that creates novel, multimedia experience to bring science to general audiences. My scientific research focuses on the search for Einstein's dream of a unified theory, which for decades has inspired me to work on string theory. For much of that time I have helped develop the possibility that the universe may have more than three dimensions of space. I'm also an author, having written four books for adults, The Elegant Universe, The Fabric of the Cosmos, The Hidden Reality, and just recently, Until the End of Time. The Elegant Universe and The Fabric of the Cosmos were both adapted into NOVA PBS mini-series, which I hosted, and a short story I wrote, Icarus at the End of Time, was adapted into a live performance with an original score by Philip Glass. Last May, my work for the stage Light Falls, which explores Einstein's discovery of the General Theory, was broadcast nationally on PBS. These days, in addition to physics research, I'm working on a television adaptation of Until the End of Time as well as various science programs that the World Science Festival is producing. I'm originally from New York and went to Stuyvesant High School, then studied physics at Harvard, graduating in 1984. After earning my doctorate at Magdalen College at the University of Oxford in 1987, I moved to Harvard as a postdoc, and then to Cornell as a junior faculty member. I have been professor mathematics and physics at Columbia University since 1996. I'll be here at 11 a.m. ET (15 UT), AMA! Username: novapbs submitted by /u/AskScienceModerator [link] [comments]

Is there any amount of turbulence which could bring a plane down? Posted: 25 May 2020 07:15 AM PDT I've heard plenty of times that this is not actually possible, but I'm wondering if it could theoretically happen. And no, I'm not asking this because I have a fear of flying. I don't need to be reassured about anything. submitted by /u/navicroc02 [link] [comments]

Why is there so little neon in Earth's atmosphere? Posted: 26 May 2020 06:57 AM PDT Neon is the 5th most common element in the universe, more so than argon. The molar mass is also 20, higher than water's 18, so it probably doesn't escape into space like helium does. Despite being so common, argon outnumbers neon 500:1 in the atmosphere. Why? Is it because Earth simply didn't start with any and that the argon came from radioactive decay? Is that why there is so much Ar-40 in the atmosphere because we never had Ar-36 to begin with? submitted by /u/GlaciatedNorth [link] [comments]

Why doesn't the CDC provided Oligonucleotide Sequences provided for Covid-19 testing match any sub-sequences provided in the updated published Covid-19 genome (version 2)? Posted: 26 May 2020 07:18 AM PDT I have been investigating the Covid-19 testing process and more specifically how the tests were created. From my understanding, the CDC has published Oligonucleotide Sequences (https://www.cdc.gov/coronavirus/2019-ncov/lab/rt-pcr-panel-primer-probes.html) that should be used by US RT-PCR test creators to detect the presence of Covid-19. From my understanding, these published sequences are the signatures for detection of the virus. In trying to understand how these sequences were created, I took the original published sequenced genome (https://www.ncbi.nlm.nih.gov/nuccore/MN908947.2) published in the "Chinese Medical Journal" and tried to find the provided CDC sequence as it is my assumption that the CDC published sequences should match the original covid-19 sequenced genome. I was able to successfully find the first provided forward primer "GAC CCC AAA ATC AGC GAA AT" matching the end of line number 28261. However, the scientists have updated the genome with a new version on Jan 17, 2020 (https://www.ncbi.nlm.nih.gov/nuccore/MN908947) and I am unable to find the sequence "GAC CCC AAA ATC AGC GAA AT" in this Covid-19 genome. I have also checked the reverse (CTG GGG TTT ...) without luck. I would assume the entire point of picking good Oligonucleotide Sequences is they should stay static over all possible Covid-19 changes. The CDC clearly says it may change these sequences but they haven't. How is this possible to have a different published Covid-19 genome that the CDC's test doesn't detect? Isn't the fact the genome was updated problematic? Could the CDC test "verified" test not actually be effective as a result? Did the CDC do it's own large scale sequencing effort since the first sequence was collected from only 5 individuals. submitted by /u/ALittleSkeptical [link] [comments]

Starting today, and continuing every day for an infinite number of days, I will add one kilogram of iron to a large heap of iron. Will my heap eventually collapse into a black hole? Or is the shock of the supernova also needed? Posted: 26 May 2020 12:29 AM PDT (Rephrased and reposted because a previous version, starting with "If I heaped", was taken down by the mods as hypothetical.) submitted by /u/thefourthchipmunk [link] [comments]

How fast does the humoral immune response occur (after becoming immune)? Posted: 26 May 2020 07:33 AM PDT Hi! I was wondering about the speed of the humoral immune response... Once immunity towards a certain antigen is achieved following a first time infection, how fast is the body's response to reinfection? Does the body develop and maintain the memory cells for an extended period of time, with these continuously pumping out antibodies with the specific surface receptors just in case reinfection occurs, or is there an "oh shit" moment wherein the body has to look through its "immunity catalogue" to then produce the required antibodies? And finally, whichever the process is, when the known antigen re-enters the body, how fast does it take for the body to trigger and execute the immune response so as to eradicate antigen from the body? Thanks! submitted by /u/nagget [link] [comments]

How do you cut a pizza into 7 equal slices using only parallel cuts? Posted: 26 May 2020 07:39 AM PDT I found this and it answers the question with 3 pieces but I was wondering if it's different for 7 or any number. https://math.stackexchange.com/questions/1857685/dividing-a-circle-into-3-equal-pieces-using-2-parallel-lines What is the equation needed to cut a circle into 7 (or any number) pieces, so that each piece has the same area, using cuts that are parallel to each other ie: only verticle. submitted by /u/cloudburstAlec [link] [comments]

Is dark matter a byproduct of the expansion of the universe, I.E the thing dark energy leaves behind after expanding into empty space? Posted: 25 May 2020 10:50 PM PDT Space has an inherent mass to it — dark matter. If you create more space, which dark energy so happens to do, would the both of them be directly linked? Instead of expanding space, would dark energy really just be creating dark matter which is space? That sounds stupid, please just focus on my first question. submitted by /u/Phalanx9G [link] [comments]

Is it possible to make sodium metal from NaOCl? Posted: 25 May 2020 05:25 PM PDT I've seen electrolysis of NaOH to make sodium metal but from what I've googled NaOCl has a melting point of 18C/64F which would make it very easy to get in a liquid state for electrolysis. Is there something that would prevent doing this and successfully making sodium metal from it? submitted by /u/Ironheart86 [link] [comments]

Is there research that shows that the absence of certain physical stressors that were present in distant past and experienced by our ancestors can worsen brain function and create mental health issues like depression? Posted: 26 May 2020 03:53 AM PDT submitted by /u/ChosenUndead24 [link] [comments]

What causes the effect of trenchfoot? Posted: 25 May 2020 09:23 PM PDT Ive been reading about ww1 and how one condition the soliders got was trench foot, where their foots would essentially melt or disintegrate. I was wondering what exactly caused the muscles to become so weak it would crumble? I read that it had to do with how being in water for long periods of time causes loss of circulation but my question is what about this interaction with water causes loss of circulation? submitted by /u/AoiBeeLey [link] [comments]

What are some ways we determine what asteroids are made of? Posted: 25 May 2020 02:07 PM PDT I know that we can look at meteorites for some clue, but I am wondering what some other ways are? submitted by /u/Chezni19 [link] [comments]

Which instruments do they use to observe photons or electrons in the double slit experiment? Posted: 25 May 2020 02:37 PM PDT I have searched a bit but all I saw was some "funny" animations about the experiment. Better; if you know a video doing this experiment with and without observing, not just showing the waves, please give me the link. Thank you in advance! submitted by /u/kneiboi [link] [comments]

Does the Earth's rotation create centripetal force against everything on it's surface? If so does that mean we aren't experiencing gravity as strong as it should be? Posted: 25 May 2020 06:59 AM PDT submitted by /u/Sebba8 [link] [comments]

Do galaxies regularly "disappear" from the edge of the observable Universe due to the ever expanding nature of space? Posted: 25 May 2020 08:48 AM PDT Here are my assumptions: The space in the Universe is expanding rapidly, attaining light speeds or even more at far away distances. This why we can only see a part of the Universe because light from beyond that point travels slower than the expanding space between it and us. The space within the observable Universe(which let's assume is a sphere) is also expanding and therefore at a certain point the galaxy at the edge must "spill" out of the surface of the observable sphere. Have we ever observed this phenomena? submitted by /u/Shoor_veer [link] [comments]

Why are Boron and Aluminum in column 13 of periodic table instead of 3? Posted: 25 May 2020 10:35 AM PDT Do the other elements in column 13 tend to ionize by giving up 3 electrons? Is 10 electrons in the shell is a stable point between 0 and 18? submitted by /u/BillTowne [link] [comments]

What is the scientific term for the amount of current/electricity a material can endure before being destroyed/melting? Posted: 25 May 2020 09:03 AM PDT I don't really know how to explain it but I'll do my best. Take a lightbulb, when it blows, what's the term for that limitation? submitted by /u/Drunken_Englishman [link] [comments]

What does the "hand" part of the motor homunculus map refer to? Posted: 25 May 2020 07:16 AM PDT I'm sorry if I'm scientifically illiterate. I'm sure you can understand what I'm trying to say here. I'm just curious about this, it's not an urgent question. I'm looking at this example and it shows quite a big area dedicated to "hand", but I'm unsure what it's referring to, as there are areas for the fingers and the wrist. Any answers are appreciated, and please excuse me for not sounding too informed submitted by /u/Ufoul [link] [comments]

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AskScience Panel of Scientists XXII

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• AskScience Panel of Scientists XXII
• Is there enough genetic material left in a loaf of bread to trace it back to the wheat plants used to make it?
• How do Genes know when to Turn On and Off?
• How high can the average bird fly? What about insects? And what determines this limit?
• How are Windows passwords checked against particular substrings like date of birth, name etc... for security reasons when the password you type is supposed to be encrypted ?
• Can messenger RNA ever enter the nucleus?
• Racial diversity in drug/vaccine development?
• Difference between sustained wind and wind gusts?
• How does your health during adolescence affect your health for the rest of your life?
• Covid-19 immunity?? Can we train our bodies through limited exposure?
• How are those incredibly zoomed out photos of the universe with the 'You are here' tag taken?
• After two months of lockdown, how can 1000 people a day still be getting infected in Los Angeles County?
• Is donated blood tested on cancer cells?
• Is there any study being done right now for us to know when an earthquake will happen?
• Will I test positive after being fully recovered from COVID?
• How true is “Everyone has a different fingerprint”?
• Can Viruses/Germs Move From One Physical Location to Another?
• Musical Instruments and Typing, Similarities in the brain?
• Does gravity cause a concentration gradient im solutions?

AskScience Panel of Scientists XXII Posted: 24 Jan 2020 05:32 PM PST Please read this entire post carefully and format your application appropriately. This post is for new panelist recruitment! The previous one is here. The panel is an informal group of redditors who are either professional scientists or those in training to become so. All panelists have at least a graduate-level familiarity within their declared field of expertise and answer questions from related areas of study. A panelist's expertise is summarized in a color-coded AskScience flair. Membership in the panel comes with access to a panelist subreddit. It is a place for panelists to interact with each other, voice concerns to the moderators, and where the moderators make announcements to the whole panel. It's a good place to network with people who share your interests! You are eligible to join the panel if you: Are studying for at least an MSc. or equivalent degree in the sciences, AND, Are able to communicate your knowledge of your field at a level accessible to various audiences. Instructions for formatting your panelist application: Choose exactly one general field from the side-bar (Physics, Engineering, Social Sciences, etc.). State your specific field in one word or phrase (Neuropathology, Quantum Chemistry, etc.) Succinctly describe your particular area of research in a few words (carbon nanotube dielectric properties, myelin sheath degradation in Parkinsons patients, etc.) Give us a brief synopsis of your education: are you a research scientist for three decades, or a first-year Ph.D. student? Provide links to comments you've made in AskScience which you feel are indicative of your scholarship. Applications will not be approved without several comments made in /r/AskScience itself. Ideally, these comments should clearly indicate your fluency in the fundamentals of your discipline as well as your expertise. We favor comments that contain citations so we can assess its correctness without specific domain knowledge. Here's an example application: Username: /u/foretopsail General field: Anthropology Specific field: Maritime Archaeology Particular areas of research include historical archaeology, archaeometry, and ship construction. Education: MA in archaeology, researcher for several years. Comments: 1, 2, 3, 4. Please do not give us personally identifiable information and please follow the template. We're not going to do real-life background checks - we're just asking for reddit's best behavior. However, several moderators are tasked with monitoring panelist activity, and your credentials will be checked against the academic content of your posts on a continuing basis. You can submit your application by replying to this post. submitted by /u/AskScienceModerator [link] [comments]

Is there enough genetic material left in a loaf of bread to trace it back to the wheat plants used to make it? Posted: 24 May 2020 04:18 PM PDT submitted by /u/Evoline17 [link] [comments]

How do Genes know when to Turn On and Off? Posted: 25 May 2020 06:10 AM PDT Certain genes are known to turn on and off at certain ages, for example in lactose intolerant adult humans (and most other mammals) the genes for producing lactase turn off after childhood. Another example is example is male pattern facial hair and baldness, how do the genes responsible for Producing DHT know when to activate to generate that phenotype? By what mechanism does the organisms body know that it's at the appropriate age to turn a particular gene on or off? submitted by /u/ChamberKeeper [link] [comments]

How high can the average bird fly? What about insects? And what determines this limit? Posted: 24 May 2020 02:20 PM PDT submitted by /u/church38 [link] [comments]

How are Windows passwords checked against particular substrings like date of birth, name etc... for security reasons when the password you type is supposed to be encrypted ? Posted: 25 May 2020 05:00 AM PDT Hello everybody, I don't know if my question is clear but I was wondering as a new coworker was getting her computer set up : some passwords are not allowed for your windows account (passwords that contain date of birth, name...). ​ But how is that possible without "storing" somewhere, even in a cache/temp folder, the password itself and not the encrypted version like it is supposed to be done for passwords ? Is there a relation between the encryption of a string, and the encryption of a substring so that it can be recognized from the encrypted version of a password that security conditions are not met ? ​ Thank you for your replies and your time Cheers submitted by /u/GoBackToTheKitchen [link] [comments]

Can messenger RNA ever enter the nucleus? Posted: 24 May 2020 08:04 PM PDT I understand that mRNAs that are transcribed in the nucleus can sometimes stay within the nucleus or be transported out via NPCs. My question is: can cytoplasmic mRNA ever enter the nucleus? Either endogenous mRNAs or perhaps exogenous mRNAs from vaccines? Thanks. submitted by /u/socxer [link] [comments]

Racial diversity in drug/vaccine development? Posted: 25 May 2020 03:26 AM PDT Just curious if there are diversity requirements (global, national, etc??) for when developing drugs or vaccines? If not, what is the rationale for why it is expected to work the same for all people? Are we making assumptions about how diseases work or how the body works? (Hope I worded that alright, I know very little about this topic. Thank you so much for your time to everyone who reads this!) submitted by /u/PreviousTale8 [link] [comments]

Difference between sustained wind and wind gusts? Posted: 24 May 2020 02:41 PM PDT I'm into wind sports and accuracy of terminology. Quite often in nasty wind conditions, the difference between sustained wind and wind gusts will be large. Sometimes the forecast changes and the difference between the sustained wind and wind gusts will decrease, creating more favorable conditions. I'm prone to calling this favorable change a "tightened gradient" but I'm not sure this is the correct terminology. Is there a better way to describe this phenomenon? Thanks! submitted by /u/Anthonyknee [link] [comments]

How does your health during adolescence affect your health for the rest of your life? Posted: 24 May 2020 12:56 PM PDT I've heard people talk about all kinds of things like your metabolism, cognitive ability, mood regulation etc being largely defined during adolescence or youth, and I am wondering if there's truth to this? submitted by /u/GeorgeIX [link] [comments]

Covid-19 immunity?? Can we train our bodies through limited exposure? Posted: 24 May 2020 11:12 PM PDT What happens when one receives a low dosage (below threshold required for infection) of the virus? Could this train your body to be somewhat immune or does it cause a mild/asymptomatic illness? submitted by /u/Qaqk [link] [comments]

How are those incredibly zoomed out photos of the universe with the 'You are here' tag taken? Posted: 24 May 2020 10:39 AM PDT I've seen some videos where they repeatedly zoom out starting from Earth. It eventually gets to the observable universe and a tag points to somewhere in the photo saying "You are here". How are we taking a photo of ourselves? Similiarly, how is a picture of the milky way taken if we are in it? submitted by /u/aangsparents [link] [comments]

After two months of lockdown, how can 1000 people a day still be getting infected in Los Angeles County? Posted: 24 May 2020 11:08 PM PDT submitted by /u/heykarlll [link] [comments]

Is donated blood tested on cancer cells? Posted: 24 May 2020 09:30 AM PDT I have read that cancer cells can travel through the bloodstream. If so, is donated blood tested on cancer cells? submitted by /u/CartesianClosedCat [link] [comments]

Is there any study being done right now for us to know when an earthquake will happen? Posted: 24 May 2020 08:02 AM PDT I know earthquakes can never be predicted like we can predict the happenings of a typhoon, but I might be sitting on an outdated information. It doesnt have to be exact, at least an estimated time works really well, and of course the general area submitted by /u/nelrossdd [link] [comments]

Will I test positive after being fully recovered from COVID? Posted: 24 May 2020 07:59 PM PDT This is not my field so I am not sure what means fully recovered exactly. The problem is that I believe I had COVID and didn't feel any symptoms because two friends of mine who live with me had fever and sore throat and we immediately isolated. We can't be sure it was covid so after a whole month we want to make a test, but would it test positive even after recovered? submitted by /u/UnbiasedPeeledPotato [link] [comments]

How true is “Everyone has a different fingerprint”? Posted: 24 May 2020 11:54 AM PDT submitted by /u/TrueProGamer1 [link] [comments]

Can Viruses/Germs Move From One Physical Location to Another? Posted: 24 May 2020 12:22 PM PDT Not sure if this is the right sub, but saw some tongs used for hotdogs at a gas station. Got me wondering, if someone used the tongs, and they had a virus, could the virus "crawl" to the tip of the tongs, essentially getting on the food the tongs are being used for? submitted by /u/ScoobaStephe [link] [comments]

Musical Instruments and Typing, Similarities in the brain? Posted: 24 May 2020 09:23 AM PDT I was recently thinking about how our brains process typing on a keyboard vs Musical Instruments. Are there similarities in how our brains process the activities besides the motor function part of the brain? When typing out a novel or playing a melody on the flute, both of them are art in a way, so I am curious if anyone has any thoughts or research articles on this. submitted by /u/wanderingjew420 [link] [comments]

Does gravity cause a concentration gradient im solutions? Posted: 24 May 2020 05:25 AM PDT For example: Is there more alcohol in the the top of my vodka bottle if i let it sit long enough? submitted by /u/dragonwin11 [link] [comments]

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Are there types of cancer that are rising in incidence and that are unrelated to smoking/drinking/sun/old age?

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• Are there types of cancer that are rising in incidence and that are unrelated to smoking/drinking/sun/old age?
• Why do meteor flashes appear green?
• How do animals know what to do with their eggs? How do they know something is going to hatch from it?
• How do you account for a large numerical disparity between two groups when doing opinion polling?
• What is the average for short-term memory sentence recall?
• Since our bodies can eradicate cancer cells to an extent, why can't we drastically mutate the antibodies that kill the cancer cells for people who have cancer? Or will it create a risk to autoimmune diseases?
• How many arteries are there at the base of each finger?
• Why does our metabolism slow down as we age?
• What's a three electron bond? Specifically, I don't get what is the electron layout that doesn't violate the Pauli principle?
• My eyeglasses have clear lenses, which obviously let light through - so why do they cast a totally dark shadow on the wall?
• If a planet spins faster does the altitude of its geostationary orbit drop?
• What are the deciding factors in the altitude that a plane flies?
• Can human sweat transmit viral infections?
• The Doppler effect. Does it change a sound's pitch, or does it change the sound's speed?
• How hot is the interstellar and intragalactic space in dense galaxy clusters?
• Can flow cytometry be used to study the cell cycle? If so, how?
• How do you measure the brain’s processing speed?
• Do cats get joint problems as often as humans? Why or why not?
• If there is a pool suspended in the air by cables or bars or something, and someone jumps into the pool, would the cables and or bars be under any more stress?
• How does an antibody test detect the presence of Covid-19, a virus?
• Don't antibody tests need to detect multiple configurations of antibodies?
• Are any of the human body's natural responses to bacterial infections also effective against viruses?
• What are the effects of CBD on REM sleep?

Are there types of cancer that are rising in incidence and that are unrelated to smoking/drinking/sun/old age? Posted: 24 May 2020 06:45 AM PDT Or is it all steady/decreasing over the years? submitted by /u/ohlordwhywhy [link] [comments]

Why do meteor flashes appear green? Posted: 23 May 2020 10:49 PM PDT submitted by /u/lawrensu339 [link] [comments]

How do animals know what to do with their eggs? How do they know something is going to hatch from it? Posted: 24 May 2020 01:27 AM PDT Do animals just intrinsically know that their eggs are going to hatch the first time they lay fertilized eggs? submitted by /u/manv33rc [link] [comments]

How do you account for a large numerical disparity between two groups when doing opinion polling? Posted: 24 May 2020 03:19 AM PDT To preface: While this stems from the ongoing unpleasantness, this is not a political thread and I'm not seeking political feedback. There was a poll done recently about public opinion re: wearing masks but someone pointed out that this paints a false picture in that it makes it seem like there are two more or less equal groups on either side of the issue when that hasn't borne out with other research done specifically on that idea. How does statistical analysis, and more specifically this sort of polling, take into account a large disparity in the actual number of pro/con respondents? In terms of answer complexity, please assume that I'm functionally five years old when it comes to math. I'm mod of /r/dyscalculia for a reason. submitted by /u/HeloRising [link] [comments]

What is the average for short-term memory sentence recall? Posted: 24 May 2020 05:21 AM PDT I tend to underline the key points of the books I read, and immediately write them down in a notebook from memory. I struggle with sentences longer than 20 words. I always reread after writing to detect any possible mistake that I may have made, then I add corrections in red when needed. After I while, I can see that I have no corrections in sentences up to 21 words. But every single sentence with at least 30 words has something in red: a comma, an inverted order of terms, the use of a synonym instead of the original word... How dumb am I compared to the average foe? Thanks! submitted by /u/edefakiel [link] [comments]

Since our bodies can eradicate cancer cells to an extent, why can't we drastically mutate the antibodies that kill the cancer cells for people who have cancer? Or will it create a risk to autoimmune diseases? Posted: 23 May 2020 01:38 PM PDT submitted by /u/poopdishwasher [link] [comments]

How many arteries are there at the base of each finger? Posted: 24 May 2020 07:20 AM PDT submitted by /u/heresjohnny1921 [link] [comments]

Why does our metabolism slow down as we age? Posted: 24 May 2020 07:03 AM PDT submitted by /u/TinyBreeze987 [link] [comments]

What's a three electron bond? Specifically, I don't get what is the electron layout that doesn't violate the Pauli principle? Posted: 24 May 2020 06:49 AM PDT I tried to search in the internet, but I can't find an explanation that I could connect to what I know (school level chemistry + quantum mechanics course from university). submitted by /u/Physmatik [link] [comments]

My eyeglasses have clear lenses, which obviously let light through - so why do they cast a totally dark shadow on the wall? Posted: 23 May 2020 10:01 PM PDT Just noticed this - the lenses of my glasses were totally indistinguishable from the plastic frames or my hand holding them. The shadow on the wall looked equally dark for all! What gives? submitted by /u/Aggabator [link] [comments]

If a planet spins faster does the altitude of its geostationary orbit drop? Posted: 24 May 2020 05:29 AM PDT And as a follow up question: would this make it easier or more difficult to build a space elevator assuming that the planets mass remains the same? submitted by /u/FagusSylva [link] [comments]

What are the deciding factors in the altitude that a plane flies? Posted: 24 May 2020 04:47 AM PDT In these days of ever increasing economical efficiency, what are the main factors taken into consideration when determining the most fuel efficient altitude to fly? Why is it 30,000 feet instead of 20,000... 10,000... or 5,000? Surely it takes a relatively large amount of fuel to get the plane 1,000 feet higher in the air. So why do they fly so high up? submitted by /u/maverickf11 [link] [comments]

Can human sweat transmit viral infections? Posted: 24 May 2020 03:05 AM PDT My wife and I enjoy watching cooking shows and are sometimes grossed out by cooks dripping sweat in/on their stations. Is our grossed out reaction unfounded? Are we just overlooking that cooked food is cooked? Are viruses transmitted via sweat? submitted by /u/PerspicaciousPony [link] [comments]

The Doppler effect. Does it change a sound's pitch, or does it change the sound's speed? Posted: 24 May 2020 02:35 AM PDT If say a siren is passing by, and is changing in pitch (a two tone siren, or a oscillating siren sound) would the oscillation, or the frequency the two tones change at change also, or would it just be the perceived pitch? submitted by /u/shokalion [link] [comments]

How hot is the interstellar and intragalactic space in dense galaxy clusters? Posted: 23 May 2020 07:48 AM PDT It seems to me that the space within these galaxy clusters would be that much higher because of the energies involved. Could life as we know it exist there? submitted by /u/Pozla [link] [comments]

Can flow cytometry be used to study the cell cycle? If so, how? Posted: 24 May 2020 01:14 AM PDT submitted by /u/Tcool14032001 [link] [comments]

How do you measure the brain’s processing speed? Posted: 23 May 2020 09:21 PM PDT How do you measure the brain's processing speed. Is there some reliable/trusted test. If so can you link it. I am dumb so i need it. submitted by /u/pickledillz [link] [comments]

Do cats get joint problems as often as humans? Why or why not? Posted: 24 May 2020 12:45 AM PDT I thought of this question while browsing /r/noodlebones. Also, I've always been amazed by cat's ability to run and jump well into old age (by cat standards). submitted by /u/_Veni_Vidi_Veni_ [link] [comments]

If there is a pool suspended in the air by cables or bars or something, and someone jumps into the pool, would the cables and or bars be under any more stress? Posted: 24 May 2020 03:38 AM PDT Basically, do you really become "weightless" while in water? submitted by /u/treblot1320 [link] [comments]

How does an antibody test detect the presence of Covid-19, a virus? Posted: 23 May 2020 11:51 PM PDT I thought antibodies fight against bacteria submitted by /u/Porksi [link] [comments]

Don't antibody tests need to detect multiple configurations of antibodies? Posted: 23 May 2020 12:43 PM PDT I'm under the impression that multiple antibodies with different binding site structures can be made by different people for the same pathogen. Every piece of literature I read refer to "the antibody" for a certain pathogen like it's some kind of singular monolithic thing, where in reality I think antibodies for a certain pathogen are actually pluralistic things with a certain degree of variability? There is no "antibody." There is no "the antibody" for SARS-CoV-2. SARS-CoV-2 for instance can have multiple unique areas on their protein structures in which multiple different antibodies can be generated, so one recovered patient can have slightly different antibodies compared to another recovered patient, but both of their antibodies will still bind to different unique areas of SARS-CoV-2. There are even companies that have whittled down numerous different antibody candidates to a few that have especially high neutralizing abilities against SARS-COV-2, the point being that multiple different antibodies can bind to one pathogen. So when people talk about an "antibody test," what are they talking about, exactly? Does the test actually detect the presence of multiple different antibodies, all of which have demonstrated binding effects with the virus? Or do the tests only detect one specific configuration of antibody, and can miss other antibody configurations, resulting in a false negative (the patient actually had been infected and did produce antibodies, just not the ones that the test is specific for). submitted by /u/rabidsoggymoose [link] [comments]

Are any of the human body's natural responses to bacterial infections also effective against viruses? Posted: 24 May 2020 02:11 AM PDT I'm talking mainly about antibodies on a serum level. submitted by /u/instantpowdy [link] [comments]

What are the effects of CBD on REM sleep? Posted: 23 May 2020 10:22 PM PDT From what I know, THC has a negative effect on sleep cycles and kills REM sleep. Does CBD do the same? submitted by /u/pokap91 [link] [comments]

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