Why does Vasodialation decrease blood pressure?

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• Why does Vasodialation decrease blood pressure?
• What impact does climate have on transmission of virus/bacteria?
• How was the picture of M87's black hole taken?
• Is it possible for a neutron star to appear as a black hole?
• What was the leading theory for what caused earthquakes before plate tectonics?
• Why does the specific gender of each parent affect the outcome of hybrid bred animals?
• What do tiny bugs do when it gets really windy?

Why does Vasodialation decrease blood pressure? Posted: 30 May 2021 11:46 PM PDT Doctors often prescribe medication for patients with high blood pressure that works by dialating blood vessles. In Physics class however, I learned that Bernoulli's principle suggests that when a fluid is flowing through a tube, dialating the tube will INCREASE the pressure, as the flow rate will be reduced. Did I learn it wrong, or does Bernoulli's principle not apply to the circulatory system? And why? submitted by /u/Xyra1011 [link] [comments]

What impact does climate have on transmission of virus/bacteria? Posted: 31 May 2021 12:27 AM PDT More specifically, COVID-19. Does the virus spread at a higher rate in certain climates? submitted by /u/_nocommonsense [link] [comments]

How was the picture of M87's black hole taken? Posted: 31 May 2021 04:00 AM PDT I know that 2 telescopes at very far distances from each other were used, but how does it work? If I put 2 telescopes 20 meters apart and use them to take pictures of the same object, would the result be better if I mixed the pictures together? submitted by /u/Blackcatblockingthem [link] [comments]

Is it possible for a neutron star to appear as a black hole? Posted: 30 May 2021 09:44 AM PDT Hello. Similar questions might have been already asked, but I can't find the exact question I'm wondering about. So the theoretical max mass for a neutron star is around 3 suns, otherwise it "becomes a black hole". I also found that the escape velocity from a neutron star is typically 200 000 km/s. But is it possible for an object to be both a neutron star and a black hole? Let's imagine a neutron star with an escape velocity of c - 1 km/s. If slightly more matter was added, the escape velocity would be more than c, so it would appear as a black hole, right? However, would it be theoretically possible for it to still be a neutron star "inside" of that black hole, just with no way to escape? submitted by /u/HappyPhage [link] [comments]

What was the leading theory for what caused earthquakes before plate tectonics? Posted: 30 May 2021 07:42 PM PDT Since plate tectonics is relatively new (validated in the 1950s), what was the leading theory for what caused earthquakes before then? Since its so new I guess there must have been some wild theories, specially in the late XIX - early XX centuries period. submitted by /u/Danocho [link] [comments]

Why does the specific gender of each parent affect the outcome of hybrid bred animals? Posted: 30 May 2021 11:36 AM PDT I learned today that in addition to ligers, there are also tigons... Ligers having lion fathers, and tigons having tiger fathers. What causes these two animals to be so different? And side question - I had always assumed people were just random 50/50 mixes of their parents; does the differences in Ligers and Tigons have any implication as to the genetic role human fathers play in outcome of our babies? submitted by /u/PMacLCA [link] [comments]

What do tiny bugs do when it gets really windy? Posted: 29 May 2021 09:28 PM PDT Is a high wind event like a natural disaster to them? Or do they deal with it easily? submitted by /u/DR_PEACETIME [link] [comments]

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If hand sanitizer kills 99.99% of germs, then won't the surviving 0.01% make hand sanitizer resistant strains?

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• If hand sanitizer kills 99.99% of germs, then won't the surviving 0.01% make hand sanitizer resistant strains?
• Does food that's got 'heat' but isn't from the genus capsicum (ie chillies), such as pepper, wasabi, ginger, mustard, etc have capsaicin in it or some other chemical that gives it 'heat'?
• Wind-powered vehicle moving directly downwind faster than wind?
• How is a galaxy formed?
• How exactly does energy convert and transfer from one form/location to another?
• Why does rabies primarily effect placental mammals?
• Blisters are generally filled with fluid. Is this fluid also produced by open wounds? If not, why?
• When would you clean with, say, vinegar or borax instead of dish soap or bleach or alcohol?
• Can silicon from old cpus and gpus be recycled and reused to manufacture the newer ones?
• How can you electrolyse water if it’s a covalent compound even though electrolysis only works on ionic compounds?
• Why do maps of the Universe always appear as ovals instead of spheres?
• Does getting blood taken after Covid-19 vaccine reduce antibodies?
• Can y’all settle a bet about exothermic reactions between me and my GF?
• The R0 value of a disease is the 'average' number of additional infected per case. Have any studies been done to see how common each number of new cases is?

If hand sanitizer kills 99.99% of germs, then won't the surviving 0.01% make hand sanitizer resistant strains? Posted: 29 May 2021 06:50 AM PDT submitted by /u/SHADYROCKS01 [link] [comments]

Does food that's got 'heat' but isn't from the genus capsicum (ie chillies), such as pepper, wasabi, ginger, mustard, etc have capsaicin in it or some other chemical that gives it 'heat'? Posted: 30 May 2021 03:20 AM PDT submitted by /u/riamuriamu [link] [comments]

Wind-powered vehicle moving directly downwind faster than wind? Posted: 29 May 2021 08:25 PM PDT Veritasium recently released a video about a wind-powered land vehicle that is capable of moving directly downwind faster than the speed of wind. The video was well made and the results were pretty clear cut, the vehicle could move downwind faster than the wind. It's an interesting video, and I generally trust Veritasium to be a reliable source of information, but something seemed off in his attempt to explain the mechanics behind this machine. He first makes references to sailboats being capable of moving faster than the wind by moving at an angle rather than downwind and taking advantage of lift. However in his attempt to translate that to the vehicle he brings up the idea that the props are actually a fan, which when spun by gearing and the wheels in turn slows down the air behind the fan blades thus speeding up the vehicle. This seems counterintuitive to me, as the rolling wheels which are moving the vehicle forward is also driving the fan; this leaves no apparent cause for the rolling of the wheels in the first place. Is the cause and effect being reversed? But in that case how is it moving downwind faster? Any other possible explanations? Source: https://www.youtube.com/watch?v=jyQwgBAaBag submitted by /u/chetanaik [link] [comments]

How is a galaxy formed? Posted: 30 May 2021 03:04 AM PDT submitted by /u/International-Emu-40 [link] [comments]

How exactly does energy convert and transfer from one form/location to another? Posted: 30 May 2021 02:34 AM PDT What exactly is the mechanism behind converting one form of energy into another, or transfering energy form one thing/location to another? By this question, I mean: What cause energy conversion and transfering? Is there a list of steps that every energy conversion process follows? Is there an "intermediate" form of energy (or so) that every energy conversion process has to go through? Is is heat? I can't seem to find or come up with any reasonable cause and mechanism behind this. However, when I searched it up on Google, I've seen plenty of results involves heat and thermal energy, which is interesting. Why is heat brought up in thermodynamics and energy-related topics so frequently? Is thermal energy one form of potential energy or a mix of kinetic-potential energy, or something completely different? What's so unique about it? I hope to see your answers on this. Even assumptions or any documents are very, very much appreciated. Thank you! submitted by /u/terror_ducks_coming [link] [comments]

Why does rabies primarily effect placental mammals? Posted: 29 May 2021 01:06 PM PDT Why is rabies so rare in marsupials and monotremes? For example, Australia has no native placental mammals which aren't either bats or primarily aquatic. They have most marsupials and monotremes. Rabies is not native there. Australia does have a virus very similar to rabies among its bat species, but it only is spread by bats and does not infect marsupials or monotremes. Opposums can get rabies but very rarely do, even when injected in labs. So why does it mostly infect placental mammals? submitted by /u/Mysterious-Plastic55 [link] [comments]

Blisters are generally filled with fluid. Is this fluid also produced by open wounds? If not, why? Posted: 29 May 2021 02:51 PM PDT submitted by /u/Wootery [link] [comments]

When would you clean with, say, vinegar or borax instead of dish soap or bleach or alcohol? Posted: 29 May 2021 04:29 AM PDT What are the properties of common solvents used to clean things, and what about them makes one better or worse at certain jobs than another? submitted by /u/Balfus [link] [comments]

Can silicon from old cpus and gpus be recycled and reused to manufacture the newer ones? Posted: 29 May 2021 07:09 AM PDT submitted by /u/LOL_WhyT [link] [comments]

How can you electrolyse water if it’s a covalent compound even though electrolysis only works on ionic compounds? Posted: 29 May 2021 08:31 AM PDT submitted by /u/Awesome_Socks_69 [link] [comments]

Why do maps of the Universe always appear as ovals instead of spheres? Posted: 28 May 2021 10:27 PM PDT If the Universe began as a singularity, and after the Big Bang the Universe expanded in all directions at same velocity, wouldn't that make the Universe a sphere? submitted by /u/Apollo_T_Yorp [link] [comments]

Does getting blood taken after Covid-19 vaccine reduce antibodies? Posted: 29 May 2021 08:06 AM PDT Hi fellow redditors, I got Covid back in January 2021, and have been fully vaccinated with the Pfizer vaccine since March. Recently I got routine blood work taken (8 tubes) and since then have been curious to know if getting blood taken after getting vaccinated reduce Covid antibodies in the body? I'm not worried just want to learn more about the science. submitted by /u/emnunez [link] [comments]

Can y’all settle a bet about exothermic reactions between me and my GF? Posted: 28 May 2021 08:56 PM PDT Context: We were eating dinner at a sushi restaurant and the sake came out way too hot. I placed the bottom of the hot cup of sake into a cup of ice water to cool it off. At this point she points at it and comments that what I was doing is an example of an exothermic reaction. I disputed this by saying the transfer of heat that melts the ice is a phase change but not an exothermic reaction because heat is being transferred but not being created by a reaction. Who is right? We have $100 riding on this. submitted by /u/HopsAndHemp [link] [comments]

The R0 value of a disease is the 'average' number of additional infected per case. Have any studies been done to see how common each number of new cases is? Posted: 29 May 2021 10:15 AM PDT For example, some flu might have 30% of cases spread it to nobody, 25% spread to one other, 15% to two, etc. Maybe even something on the prevalence of super spreaders and their effects. I'm picturing a line graph that shows how many people had x number of cases. submitted by /u/Ghosttwo [link] [comments]

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If some animals can emit light, can they emit other forms of electromagnetic radiation in useful ways (obviously, excluding infrared as escaped heat)?

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• If some animals can emit light, can they emit other forms of electromagnetic radiation in useful ways (obviously, excluding infrared as escaped heat)?
• I sometimes see a chicken egg with two yolks inside. If the egg were to be fertilized, would the two yolks result in twin baby chicks?
• How does memory recall work?
• Why do some fish have red flesh while others have white? Is it to do with the food they eat?
• Can O2 oxidize Iodide to Iodine?
• In Covid vaccine, what technique was used to ensure all the mRNA is encapsulated in the nanoparticles?
• Before we understood how light waves work, what was the historical understanding of refraction?
• When a positive sense single stranded RNA virus first enters the cell does it carry it's own RdRp?
• Can an mRNA vaccine produce any protein that a cell can normally produce or are their limitations?
• Is visual reaction time naturally faster in our peripheral vision?
• Do 2WD cars have a center differential? If so, why?
• How does solidifying candy (power to solid) work?
• How exactly does a rattlesnake's tail work?
• When a person says they have oily skin, does that really mean that the skin produces oil? If so, what kind of oil is it?

If some animals can emit light, can they emit other forms of electromagnetic radiation in useful ways (obviously, excluding infrared as escaped heat)? Posted: 28 May 2021 03:26 PM PDT submitted by /u/Masske20 [link] [comments]

I sometimes see a chicken egg with two yolks inside. If the egg were to be fertilized, would the two yolks result in twin baby chicks? Posted: 28 May 2021 08:42 AM PDT Exactly what the title says! I know commercial chicken eggs are not fertilized (at least not on purpose!) so the yolks could never become chicks. Would double yolks even appear in a fertilized chicken egg? submitted by /u/thunbergfangirl [link] [comments]

How does memory recall work? Posted: 28 May 2021 01:29 PM PDT If memories are signal patterns stored in the brain cells, how does the brain know how to fire the right cells to create the same patterns to recall those memories, and where is the information about those patterns stored? submitted by /u/-t-o-n-y- [link] [comments]

Why do some fish have red flesh while others have white? Is it to do with the food they eat? Posted: 28 May 2021 08:33 AM PDT submitted by /u/Akseli_P [link] [comments]

Can O2 oxidize Iodide to Iodine? Posted: 28 May 2021 12:59 PM PDT So, I was wondering if O2 can oxidize the Iodide in a KaI Solution to I2 at a near neutral pH? My guess is that it should work, since the standard electrode potential between both pairs is high enough, yet i have never seen a solution react in this manner. If anyone can help me with this, it would be much appreciated. submitted by /u/corpse23 [link] [comments]

In Covid vaccine, what technique was used to ensure all the mRNA is encapsulated in the nanoparticles? Posted: 28 May 2021 08:24 AM PDT submitted by /u/lifesaboxofchoco [link] [comments]

Before we understood how light waves work, what was the historical understanding of refraction? Posted: 28 May 2021 07:42 AM PDT I was taking a bath earlier and if I didn't know any better, I totally could have been convinced that my hand was physically shrinking when I dipped it in the water. Did people believe anything to that effect before we understood that it was refraction of light waves? Or did people generally understand it was some kind of trick of the light? submitted by /u/crass-sandwich [link] [comments]

When a positive sense single stranded RNA virus first enters the cell does it carry it's own RdRp? Posted: 28 May 2021 02:35 PM PDT Or since it is directly translated does it make rdrp once it is already in the cell? submitted by /u/irras005 [link] [comments]

Can an mRNA vaccine produce any protein that a cell can normally produce or are their limitations? Posted: 28 May 2021 08:58 AM PDT Does the process of having to pass through the cell wall and into the nucleus impose any limitations on what can be built as a result? submitted by /u/HeliumBurn [link] [comments]

Is visual reaction time naturally faster in our peripheral vision? Posted: 28 May 2021 03:50 AM PDT I was doing some reaction time tests online for fun today, where the screen is red and you have to click as soon as it switches to green. Doing this, I discovered that my reaction time is considerably and consistently faster when I actually look away from the screen and only seeing it in my peripheral vision. When looking at the screen directly, my reaction time averages at a little over .2 ms, and with my peripheral vision, it's consistently .17-.19 ms. Is this a normal occurrence that can be explained scientifically? submitted by /u/__Xander_ [link] [comments]

Do 2WD cars have a center differential? If so, why? Posted: 28 May 2021 11:02 AM PDT Title submitted by /u/scobeavs [link] [comments]

How does solidifying candy (power to solid) work? Posted: 28 May 2021 02:12 AM PDT Flaired under chemistry as it seems the most relevant to this "food science" question, although physics might also be relevant. There seems to be a type of novelty DIY candy where two forms of powder are mixed, suspended in a liquid, and combined to create a solid strip of candy upon being pulled out and exposed to air. What stages/processes might be involved in this, or how does something like this actually work? (E.g. why does it not solidify into a lump when it is already suspended in the solution without being pulled out?) submitted by /u/n0c0ld314 [link] [comments]

How exactly does a rattlesnake's tail work? Posted: 27 May 2021 09:05 PM PDT What is it that makes the rattle sound? Is it some loose bit of bone or bits of layered shell? And how do they grow their tail? Side question: How accurately do rattlesnakes in movies sound? submitted by /u/JadesArePretty [link] [comments]

When a person says they have oily skin, does that really mean that the skin produces oil? If so, what kind of oil is it? Posted: 27 May 2021 10:29 PM PDT submitted by /u/trip_dip [link] [comments]

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Google, 1600 Amphitheatre Parkway, Mountain View, CA 94043, United States

AskScience AMA Series: I'm Dr. Katie Mack, theoretical astrophysicist, TED Fellow, and author of The End of Everything, which describes five possible ways the universe could end. I'm here to answer questions about cosmic apocalypses, the universe in general, and writing (or tweeting) about science!

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• AskScience AMA Series: I'm Dr. Katie Mack, theoretical astrophysicist, TED Fellow, and author of The End of Everything, which describes five possible ways the universe could end. I'm here to answer questions about cosmic apocalypses, the universe in general, and writing (or tweeting) about science!
• If looking further into space means looking back into time, can you theoretically see the formation of our galaxy, or even earth?
• How much does personality really differ between sexes as compared to within-sex variation?
• why does the earth and the sea gets pulled towards the moon?
• The COVID strain in India?
• What is the lowest light humans can see??
• How stable is the sun compared to other G-Type Main Sequences Stars?
• Why empirical study uses notional value derivatives, not fair value?
• Why is static friction generally stronger than kinetic friction? What is happening at the atomic level to cause the difference?
• Can you build a superconductor battery?
• How is it possible that silverweed (Argentina anserina) can be "native" across different continents? Why wouldn't it have evolved into different species on different continents?
• Why are mountains so ‘disorderly’ or ragged when I thought it was just fault-lines or similar that made them?
• What medium fills the synaptic cleft?
• Can an infection of COVID-19 1 day after a second dose of vaccination compromise vaccine efficacy in future months ?
• How is the suturing done after open heart surgery? And how do they allow for movement immediatly post-op?
• What is the difference between conservation and constraint in regards to genetic sequence?
• How do we get perfectly accurate measurements for things if all experiments have inaccuracies?

AskScience AMA Series: I'm Dr. Katie Mack, theoretical astrophysicist, TED Fellow, and author of The End of Everything, which describes five possible ways the universe could end. I'm here to answer questions about cosmic apocalypses, the universe in general, and writing (or tweeting) about science! Posted: 28 May 2021 04:00 AM PDT Dr. Katie Mack is a theoretical astrophysicist, exploring a range of questions in cosmology, the study of the universe from beginning to end. She is currently an assistant professor of physics at North Carolina State University, where she is also a member of the Leadership in Public Science Cluster. She has been published in a number of popular publications, such as Scientific American, Slate, Sky & Telescope, Time, and Cosmos magazine, where she is a columnist. She can be found on Twitter as @AstroKatie. See you all at 1:30pm EDT (17:30 UT), ask me anything! Username: /u/astro_katie submitted by /u/AskScienceModerator [link] [comments]

If looking further into space means looking back into time, can you theoretically see the formation of our galaxy, or even earth? Posted: 27 May 2021 10:29 AM PDT I mean, if we can see the big bang as background radiation, isn't it basically seeing ourselves in the past in a way? I don't know, sorry if it's a stupid question. submitted by /u/YoggieD [link] [comments]

How much does personality really differ between sexes as compared to within-sex variation? Posted: 27 May 2021 11:28 AM PDT I'm wondering about this because a common criticism of gay relationships is that men and women are complementary, but same-sex couples are not. However, it seems to me like sex is probably not a great predictor of complementarity. As far as personality goes, as long as there is significant overlap between the distribution of personalities for the sexes, it should be feasible to find complementary pairs both for homosexual and heterosexual couples. What I'm looking for is data that shows how much overlap there is between personalities for the sexes. Any related research would also be interesting :) Thank you! submitted by /u/Gugteyikko [link] [comments]

why does the earth and the sea gets pulled towards the moon? Posted: 28 May 2021 05:25 AM PDT Since the gravity of the earth is greater than the gravity of the moon why does the seas get pulled there? lets say i know why the sea gets pulled towards the moon then why does the earth get pulled towards it since the gravity of the sun is greater and the gravity of the earth is greater than the gravity of the moon? Is the earth's attraction towards the moon the same amount of the attraction to the moon towards the sun? and if that's correct how does that make any sense since the gravity of the earth is greater than the gravity of the moon? submitted by /u/Hemo_aladwan [link] [comments]

The COVID strain in India? Posted: 28 May 2021 05:25 AM PDT Is the COVID strain that has been discovered in India more deadly in terms of altering the disease progression pattern? Media has been reporting that many people there are dying including the younger population. Anyone? submitted by /u/Worldly_Act [link] [comments]

What is the lowest light humans can see?? Posted: 27 May 2021 11:22 AM PDT Not in wavelength, more as in lumens or lux, trying to see if certain sources are good enough to read by submitted by /u/VictimofAnxiety [link] [comments]

How stable is the sun compared to other G-Type Main Sequences Stars? Posted: 27 May 2021 02:58 PM PDT I am curious about both short-term (Solar Cycles) and Long Term (Overall Evolution) submitted by /u/somethingicanspell [link] [comments]

Why empirical study uses notional value derivatives, not fair value? Posted: 27 May 2021 05:17 PM PDT I am currently doing research on the relationship and the effect of hedging using financial derivatives on the size of risks in banks. And I noticed that most of the previous studies used the (Notional contract amounts) instead of the (fair value). Can anyone provide me with the scientific reasons for this, and is there a better way to determine the size of the use of derivatives in the hedging process? submitted by /u/albasheer_shakir [link] [comments]

Why is static friction generally stronger than kinetic friction? What is happening at the atomic level to cause the difference? Posted: 27 May 2021 11:51 AM PDT submitted by /u/throwaway3141598 [link] [comments]

Can you build a superconductor battery? Posted: 27 May 2021 11:36 AM PDT My physics teacher told me you can basically put a much electric energy in a superconductor as you want. She also told me that, if you would for example put two ends of the cable where the energy is flowing through together, the electricity would still flow through. So why don't we build super effective superconductor batteries? submitted by /u/Giftzwerg27 [link] [comments]

How is it possible that silverweed (Argentina anserina) can be "native" across different continents? Why wouldn't it have evolved into different species on different continents? Posted: 27 May 2021 10:35 AM PDT I was looking at silverweed's Wikipedia entry and it says that it is native throughout the temperate Northern hemisphere. Other websites seemed to confirm it is considered "native" in parts of North America, Europe and even Eurasia. This was surprising as I'd usually expect different "native" species of the same family of plants in NA vs Europe (such as the various kinds of maple trees). So why would silverweed be the same species on both continents? submitted by /u/pm_me_ur_10betweens [link] [comments]

Why are mountains so ‘disorderly’ or ragged when I thought it was just fault-lines or similar that made them? Posted: 27 May 2021 06:07 PM PDT submitted by /u/Gfish59 [link] [comments]

What medium fills the synaptic cleft? Posted: 27 May 2021 03:29 PM PDT I was looking into the synaptic cleft and came across many diagrams like this they show the operation of impulse transmission but don't mention what the medium through which the neurotransmitters etc are moving. Is it just salt water? what is the ambient medium around cells? submitted by /u/ASKBTAW [link] [comments]

Can an infection of COVID-19 1 day after a second dose of vaccination compromise vaccine efficacy in future months ? Posted: 27 May 2021 06:02 AM PDT submitted by /u/lockoms [link] [comments]

How is the suturing done after open heart surgery? And how do they allow for movement immediatly post-op? Posted: 27 May 2021 01:15 AM PDT After a surgery, to most areas you can let the muscles rest and heal. With a heart surgery the heart needs to be strong enough immediatly post-op to withstand violent contractions, while maintaining a pressure differential. How is this achieved? submitted by /u/tmw349 [link] [comments]

What is the difference between conservation and constraint in regards to genetic sequence? Posted: 27 May 2021 10:06 AM PDT I understand that within multiple sequence alignments you can identify conserved regions as all positions have the same nucleotide/amino acid. I also understand that constraint means the lack of variation but isn't that just the same as how conserved something is? If a region within a genome is highly conserved would it not be highly constrained as well? Can you have conserved sequences that also have lots of variants? submitted by /u/reaker_ [link] [comments]

How do we get perfectly accurate measurements for things if all experiments have inaccuracies? Posted: 27 May 2021 09:15 AM PDT For example recently in lab we have been doing experiments regarding the enthalpy of alcohols. Because of heat loss and other factors the value we go was always below the 'ideal' value, begging the question how is it possible to get an 'ideal value' submitted by /u/Superman0379 [link] [comments]

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