Would suction cups not work in a vacuum?

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• Would suction cups not work in a vacuum?
• Since viruses cannot create energy, how do they physically infect a cell?
• Mix and match additional primary shot?
• Is it possible for vacuum chambers to have a temperature, and if so, why?
• Are there other cell entry mechanisms for COVID19 besides ACE2 receptor?
• How does James Webb Space Telescope's halo orbit around L2 work?
• In reference to an "intracellular redox state," what exactly is reduced or oxidized?
• What color would radon glow in a gas-discharge lamp?
• How much can eating, drinking, or smoking affect a covid test (antigen, moleculer, and or PCR)?
• Does Omicron procure a good immunity against "older" variants ?
• Do we know of any non-crown group amniotes?
• Why do biologists distinguish between odd-toed and even-toed ungulates?
• What is the hormonal function of steroids which differentiates them from other types of hormones such as peptides or eicosanoids?
• There have been 7 earthquakes in South Carolina since Tuesday. All were centered near the same town. How often does something like this happen (not just in SC but globally?) When it does, how often does it turn out that the cluster of small earthquakes were foreshocks for a big earthquake?
• Serious Question: what fills the void of the scrotum?

Would suction cups not work in a vacuum? Posted: 31 Dec 2021 01:44 PM PST I was thinking about how if you suck all the air out of a sealed plastic bag, like a beach ball, it's nearly impossible to pull it apart so that there is a gap between the insides of the plastic. This got me wondering, is this the same phenomenon that allows suction cups to stick to surfaces? And then I got to thinking, is all that force being generated exclusively by atmospheric pressure? In a vacuum, would I be able to easily manipulate a depleted beach ball back into a rough ball shape or pull a suction cup off of a surface, or is there another force at work? It just seems incredible that standard atmospheric pressure alone could exert that much force. submitted by /u/scarletice [link] [comments]

Since viruses cannot create energy, how do they physically infect a cell? Posted: 31 Dec 2021 02:27 PM PST I would imagine there must be some mechanism that actually gets the virus inside the cell. They can't produce energy, so how do they actually get in the cell? submitted by /u/TheBoredIndividual [link] [comments]

Mix and match additional primary shot? Posted: 01 Jan 2022 05:28 AM PST Why does the CDC recommend that an additional primary shot should be the same as the first two doses? https://www.cdc.gov/coronavirus/2019-ncov/vaccines/recommendations/immuno.html submitted by /u/Nathan-NL [link] [comments]

Is it possible for vacuum chambers to have a temperature, and if so, why? Posted: 31 Dec 2021 07:45 AM PST Sorry if this is a dumb question, but this has kind of stumped me for a while. In my understanding of heat/temperature, it is the amount of energy particles have, but if there is a lack of particles, how could temperature exist in a vacuum chamber? Edit: thanks for the answers everyone! submitted by /u/Ya_Skinny_Homie [link] [comments]

Are there other cell entry mechanisms for COVID19 besides ACE2 receptor? Posted: 01 Jan 2022 12:45 AM PST ACE2 is the known entry mechanism. Have any other mechanisms been found or proposed? If you have decent articles on the subject, please link. If the article has paywall, please link reference. submitted by /u/england_man [link] [comments]

How does James Webb Space Telescope's halo orbit around L2 work? Posted: 31 Dec 2021 06:03 AM PST I know that JWST won't be orbiting around any specific body in L2, so what causes it to keep in that orbit? submitted by /u/UnheardIdentity [link] [comments]

In reference to an "intracellular redox state," what exactly is reduced or oxidized? Posted: 01 Jan 2022 08:18 AM PST I am reading about the effects of oxidation state in oligodendrocyte progenitor cells and their susceptibility to tumor necrosis factor-alpha based on the redox state at the time of TNF exposure. oligodendrocytes that are more intracellularly reduced are more resistant to TNF effects as compared to more oxidized cells during a similar exposure. What is reduced or oxidized intracellularly to create the overall redox state? I think I have overlooked something in my understanding of cell bio. Is this simple the greater or lesser presence of reactive oxygen species intracellularly? submitted by /u/Act_Appalled [link] [comments]

What color would radon glow in a gas-discharge lamp? Posted: 31 Dec 2021 02:38 AM PST This has been asked here before, but I've not yet seen a satisfactory answer...so here it goes again: What color would radon glow in a gas-discharge lamp? (I'm aware of the practical difficulty in setting up a real-world radon gas-discharge lamp). I have a small project in which I'm using colored pigments to represent the gas-discharge colors for the noble gases found in nature (i.e. the known noble gasses excluding oganesson), so I'm using pink for helium, orange-red for neon, etc., and I'm looking for a reasonable color to use for radon. For this project the radon color doesn't have to be a perfect match for a hypothetical real-world discharge lamp, I just need a *reasonable* color. Thanks for the suggestions! submitted by /u/tubuliferous [link] [comments]

How much can eating, drinking, or smoking affect a covid test (antigen, moleculer, and or PCR)? Posted: 31 Dec 2021 10:04 PM PST submitted by /u/C0wMoo [link] [comments]

Does Omicron procure a good immunity against "older" variants ? Posted: 31 Dec 2021 01:11 AM PST Omicron seems to be different enough from older variants to more easily bypass the vaccine that have been developped against them. And, I'm earing some experts thinking that Omicron could a good thing (if it really is mild enough) to reach some kind of herd immunity. But, I suppose this would only work if an Omicron infection offer good protection against other variants, which seem counter intuitive with the fact it bypass vaccine for those variants. submitted by /u/ouvreboite [link] [comments]

Do we know of any non-crown group amniotes? Posted: 31 Dec 2021 07:47 AM PST Are palaeontologists aware of any amniote groups besides synapsids and sauropsida? Is there any palaeontological discussion on if such animals have existed? The few I see described are only known from a single fossil with uncertain affinity except this study which claims diadectomorphs and seymouriamorphs were amniotes. submitted by /u/sille321 [link] [comments]

Why do biologists distinguish between odd-toed and even-toed ungulates? Posted: 31 Dec 2021 12:20 AM PST What makes this distinction useful? If it has to do with ancestry, why did these animals keep odd or even numbers of toes? Is there an evolutionary pressure to lose/gain toes in pairs? submitted by /u/Jop_pop_ [link] [comments]

What is the hormonal function of steroids which differentiates them from other types of hormones such as peptides or eicosanoids? Posted: 30 Dec 2021 10:34 PM PST Steroidal hormones such as testosterone or cortisol as described as "hormones" and "signalling agents" of the body. Yet that's a category that's covered as well by neurotransmitters (responsible for signalling) and insulin (a peptide that also a signalling agent, and a hormone). So what's the function of a hormone which makes it "steroidal" as opposed to other hormones like insulin? submitted by /u/BigBootyBear [link] [comments]

There have been 7 earthquakes in South Carolina since Tuesday. All were centered near the same town. How often does something like this happen (not just in SC but globally?) When it does, how often does it turn out that the cluster of small earthquakes were foreshocks for a big earthquake? Posted: 30 Dec 2021 05:58 PM PST 10 Most Recent Earthquakes (in South Carolina) Date: 12/30/2021 Magnitude: 2.41 Depth (km): 3.78 Date: 12/30/2021 Magnitude: 2.51 Depth (km): 2.51 Date: 12/29/2021 Magnitude: 2.29 Depth (km): 1.57 Date: 12/27/2021 Magnitude: 1.74 Depth (km): 4.89 Date: 12/27/2021 Magnitude: 2.13 Depth (km): 0.74 Date: 12/27/2021 Magnitude: 2.52 Depth (km): 2.4 Date: 12/27/2021 Magnitude: 3.3 Depth (km): 3.16 Date: 12/20/2021 Magnitude: 1.13 Depth (km): 2.75 Date: 12/5/2021 Magnitude: 2.25 Depth (km): 0.09 Date: 11/27/2021 Magnitude: 1.88 Depth (km): 1.98 Source: https://www.dnr.sc.gov/geology/recent-earthquakes.html submitted by /u/simAlity [link] [comments]

Serious Question: what fills the void of the scrotum? Posted: 30 Dec 2021 04:13 PM PST I've yet to get a good answer to this. Best I can come up with is that it is mostly "vacuum sealed" with some interstitial fluid and lymph. Is this accurate? So is it fluid? Is there air in there? A bit of both? submitted by /u/smasoya [link] [comments]

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How easy would it be to crack Nazi encrypted “Enigma" machine with today’s technology?

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How easy would it be to crack Nazi encrypted “Enigma" machine with today’s technology? Posted: 30 Dec 2021 10:08 PM PST That seemed like unreal tech back in the day. I'm curious how easy it would be for us to crack it today. submitted by /u/LJT84 [link] [comments]

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

Do we have evidence that Omicron is "more mild" than Delta coronavirus?

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• Do we have evidence that Omicron is "more mild" than Delta coronavirus?
• Two bowling balls are at rest 5 Megaparsecs apart, and connected with a cable. Is there any tension in the cable caused by universal expansion?
• How come men can lose their hair, while it rarely happens in women?
• How does half life work?
• Why does solar pressure cause rotations of the JWST instead of just pushing it away uniformly?
• what are periods like for people in space/the iss?
• In terms of number of planets, how big is our solar system compared to other planetary systems discovered?
• Do animals' seasonal adaption cycles (antlers, winter coats, etc.) change if the animal is transported from the northern to southern hemisphere? (or vice versa)
• How do you use the JWST?
• What exactly IS displacement current and why is it called current if its not actually a current?
• Can you get Covid from animals infected with the Sars-Cov-2 virus?
• Just how unique are HeLa cells?
• Are there plane-filling curves that fill an infinite plane?
• How does Humira (TNF-a antagonist) differ from Skyrizi (IL-17/23 inhibitor)?
• How did scientists know about the presence of brain neurotransmitters and what they are made of?
• How Is adderall related to meth?
• At what scale is the universe expanding?
• Does the James Webb telescope have an increased risk of dust or micrometeorites impacts at the L2 point?
• A fossilized therapod embryo named "Baby Yingliang" was recently discovered in China. How can scientists tell from a fossil that the embryo was a dinosaur and not a more modern bird?
• Will the JWST sun sheild unintentionally act as a solar sail?

Do we have evidence that Omicron is "more mild" than Delta coronavirus? Posted: 30 Dec 2021 06:42 AM PST I've seen this before in other topics, where an expert makes a statement with qualifications (for example, "this variant right now seems more 'mild', but we can't say for sure until we have more data"). Soon, a black and white variation of the comment becomes media narrative. Do we really know that Omicron symptoms are more "mild"? (I'm leaving the term "mild" open to interpretation, because I don't even know what the media really means when they use the word.) And perhaps the observation took into account vaccination numbers that weren't there when Delta first propagated. If you look at two unvaccinated twins, one positively infected with Delta, one positively infected with Omicron, can we be reasonably assured that Omicron patient will do better? submitted by /u/jdtrouble [link] [comments]

Two bowling balls are at rest 5 Megaparsecs apart, and connected with a cable. Is there any tension in the cable caused by universal expansion? Posted: 30 Dec 2021 12:32 PM PST According to Hubble's Law, at 5 Mpcs distance each bowling ball would see the other receding at 351.5 km/s, but the cable prevents that from happening. Does that mean there's a "cosmological stress" in the cable induced by the expansion? submitted by /u/TheFuzziestDumpling [link] [comments]

How come men can lose their hair, while it rarely happens in women? Posted: 30 Dec 2021 04:55 AM PST What biological processes exist for women that make them much less likely to go bald? submitted by /u/69420sixnine69 [link] [comments]

How does half life work? Posted: 30 Dec 2021 05:56 AM PST What isn't whole life stated instead of half life? submitted by /u/royhinckly [link] [comments]

Why does solar pressure cause rotations of the JWST instead of just pushing it away uniformly? Posted: 30 Dec 2021 11:37 AM PST I've been curious about this for a long time and I expected that when the Aft Momentum Flap was eventually deployed (as it was today), there would be more layman-accessible explanations of this; however, I've not found any. My naive first guess about how solar pressure would affect JWST would be that the force would be uniformly in one direction: outward from the sun, and therefore cause it to move slightly away from the sun over time, but not cause any changes in rotations or orientation. So how, exactly, does solar pressure cause rotations of the JWST instead? So far the only explanation I've found is what it says in NASA's blog, which doesn't explain how solar pressure causes rotations (https://blogs.nasa.gov/webb/2021/12/30/webbs-aft-momentum-flap-deployed/): "The aft momentum flap helps minimize the fuel engineers will need to use throughout Webb's lifetime, by helping to maintain the observatory's orientation in orbit. As photons of sunlight hit the large sunshield surface, they will exert pressure on the sunshield, and if not properly balanced, this solar pressure would cause rotations of the observatory that must be accommodated by its reaction wheels. The aft momentum flap will sail on the pressure of these photons, balancing the sunshield and keeping the observatory steady." One explanation that occurred to me is that the telescope is running into more solar wind in the direction of motion (like how a fast runner runs into more rain droplets on their front than their back), is that on the right track? Bonus question: how does the Aft Momentum Flap counteract the force? (Although perhaps the answer will be self-evident after one understands the reason for the rotation.) submitted by /u/stdio-lib [link] [comments]

what are periods like for people in space/the iss? Posted: 30 Dec 2021 04:07 AM PST submitted by /u/InitialPineapple8012 [link] [comments]

In terms of number of planets, how big is our solar system compared to other planetary systems discovered? Posted: 30 Dec 2021 08:36 AM PST submitted by /u/sacrificialfuck [link] [comments]

Do animals' seasonal adaption cycles (antlers, winter coats, etc.) change if the animal is transported from the northern to southern hemisphere? (or vice versa) Posted: 30 Dec 2021 07:44 AM PST submitted by /u/pickled_things_ [link] [comments]

How do you use the JWST? Posted: 30 Dec 2021 03:45 AM PST The JWST is on its way, it's make me wonder who and how do you use it? To all astronomers in this group who have used a space telescope, what is the bureaucracy and technical process of using such a device? submitted by /u/Duchy_ofConstelation [link] [comments]

What exactly IS displacement current and why is it called current if its not actually a current? Posted: 30 Dec 2021 09:53 AM PST So I thought displacement current was essentially current per area, as those are its units, but RobusEtceterus pointed out, in another thread, that it doesn't actually jave anything to do current and is instead a time varying E field. But if it a time varying E field, why doesn't it have units of (E field)/time? I did look up displacement current and Wikipedia says it's the time derivative of D. I learned about the D field a couple months in my intro to electromagnetics course and the definition I was using then, as it's the only one I could find that made any kind of intuitive sense, from www.byjus.com is: "Electric displacement, denoted by D, is the charge per unit area that would be displaced across a layer of conductor placed across an electric field. It is also known as electric flux density." The term "displacement" make it sound like the charges are actually moving, which of course makes me think of a current, but thinking more careful about the above definition, it say "the charge per unit area that would be displaced", which makes it sound like there isn't any actual displacement. But, it would be displaced...if what? And if displacement current is the time derivative, that makes me think there has to be SOME movement going on, and if the charges are, moving, them wouldn't that mean a current? Furthermore, how is this related to the E field anymore than regular old current is? (That's not to say that current isn't related to the E field, but that we usually use voltage and current as higher level abstractions to avoid having to explicitly talk about fields, and I don't see how displacement current is anymore linked to the E field than the current is). submitted by /u/dcfan105 [link] [comments]

Can you get Covid from animals infected with the Sars-Cov-2 virus? Posted: 29 Dec 2021 05:26 PM PST ETA: I meant if you eat the flesh of the animal - ie: deer. Sometimes my mind goes faster than my finger can type lol submitted by /u/AlphaMomma59 [link] [comments]

Just how unique are HeLa cells? Posted: 30 Dec 2021 07:26 AM PST Simplifying the question, out of 8 billion people, how many would have this type of cell structure and behaviour? Do you have to have cancer for this kind of multiplication or can it happen in normal, healthy cells too? I tried to google the question without success. I am guessing it might be impossible to answer correctly. Wikipedia says there are other immortalized cell lines, including from monkey kidney. I am curious about the occurrence of that behaviour in humans. submitted by /u/VirtualMoneyLover [link] [comments]

Are there plane-filling curves that fill an infinite plane? Posted: 30 Dec 2021 08:29 AM PST submitted by /u/thetimujin [link] [comments]

How does Humira (TNF-a antagonist) differ from Skyrizi (IL-17/23 inhibitor)? Posted: 30 Dec 2021 03:28 AM PST I'm curious how these biologics relate to one another, and specifically how TNF-a influences skeletal muscle submitted by /u/Perceptive_Peter [link] [comments]

How did scientists know about the presence of brain neurotransmitters and what they are made of? Posted: 30 Dec 2021 12:10 AM PST Like, we know about serotonin, dopamine, endorphin, etc. but how did the study of it all started? And how did scientists know what chemical compounds the neurotransmitters are made of? submitted by /u/nomorewigstofly [link] [comments]

How Is adderall related to meth? Posted: 30 Dec 2021 01:05 AM PST I saw that the adderall has amphetamine salts but I've never taken a chemistry course so I'm wondering what exactly does that mean to it's relation with meth. How are they the same? Are they different? submitted by /u/DisappearLikeElChapo [link] [comments]

At what scale is the universe expanding? Posted: 29 Dec 2021 11:52 PM PST I understand (more or less, a lot less) that the universe isn't expanding "into" anywhere, but where within the universe is the expansion happening? Is the space between atoms, or the subatomic particles comprising atoms increasing? Are the particles themselves getting bigger? (Compared to what?) Am I getting bigger? (Besides the quarantine 15 I mean). Is the distance between the earth and the moon, or the sun, or the distance from New York to London getting bigger? submitted by /u/1-900-USA-NAILS [link] [comments]

Does the James Webb telescope have an increased risk of dust or micrometeorites impacts at the L2 point? Posted: 30 Dec 2021 04:22 AM PST Does the L2 point have any significant attraction that would put James Webb at increased risk of damage to its mirrors from stray dust? I'm not very familiar with the mechanics of the Lagrangian points... submitted by /u/The_Brewer [link] [comments]

A fossilized therapod embryo named "Baby Yingliang" was recently discovered in China. How can scientists tell from a fossil that the embryo was a dinosaur and not a more modern bird? Posted: 29 Dec 2021 05:32 PM PST A fossilized therapod embryo named "Baby Yingliang" was recently discovered in China about a week ago, and the pictures of it look remarkably (to my untrained eye) like a bird. I know the link between therapods and birds is a big part of why this fossil is interesting, but how can they be so sure it's a dinosaur and not just some extinct bird? Can you DNA test a fossil? (I feel like you can't) submitted by /u/Catatonic27 [link] [comments]

Will the JWST sun sheild unintentionally act as a solar sail? Posted: 30 Dec 2021 04:19 AM PST I have heard of the concept of solar sails before and am curios (tried searching the subject) if the JWST sun sheild will unintentionally act as a solar sail and need to some how be accounted for and off set. submitted by /u/keel_zuckerberg [link] [comments]

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What is the incubation time of the corona virus?

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• What is the incubation time of the corona virus?
• How was cancer treated in the 1930s or 1940s did the treatments work or did you just die?
• How does my brain understand where pain is spatially located?
• When we shine a light through coloured plastic/cellophane, the light projected assumes that colour. Does this mean that the photons themselves are being coloured as the pass through the plastic?
• How does a nuclear reaction actually begin?
• What types of liquids can form oceans on planets?
• Can explosives be detonated with sound waves?
• Are there viruses that find sources of energy outside of cell synthesis (like eating) or are they created with a set amount of energy and must replicate before they "die"?
• Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology
• Is there a difference in how energy is transferred due to AC current vs DC current?
• Who was the first person who discovered that moon has reflected light?
• How do interrupt handlers get context about what caused the interrupt?
• What's the peak timeframe after a stroke when its most likely to show up on an MRI?
• Since the James Webb Telescope is collecting very low quantities of light, how do they decide where to point it?
• When archeologists find a fossil millions of years old, how do they determine its age if carbon dating has a limit of ~60,000 years?
• Does mRNA based protein synthesis happen at the same rate for everyone for a given volume of mRNA?
• Why do thinly cut foods stay hard when boiled but thicker cuts go soft?
• Geologists and earth scientists here, what does it mean to say that a place is 60 m high from sea level? Can we dig that and get the actual sea?
• What are the chances of the James Webb Space Telescope being struck by space debris?
• What's the point of rocket fuel in space?

What is the incubation time of the corona virus? Posted: 29 Dec 2021 03:31 AM PST Two years ago it was explained that the great danger of covid was the long incubation of roughly two weeks between infection and outbreak/symptoms. So you would go around and spread it without realizing you were carrying it. How is the situation now, especially regarding the new variants? Is the incubation time more precise now? Googling this info gave me a headache. Just too much about this topic. Any input if we are at the same spot as two years ago or more advanced is much appreciated! submitted by /u/SpaceJinx [link] [comments]

How was cancer treated in the 1930s or 1940s did the treatments work or did you just die? Posted: 29 Dec 2021 01:33 AM PST submitted by /u/Intrepid_Ad_8596 [link] [comments]

How does my brain understand where pain is spatially located? Posted: 29 Dec 2021 04:01 AM PST Hi, I understand the basics of how pain and nervous system work: when something bad happens, our nerves fire pain signals. However, the thing that eludes me is: how does brain know where the pain is spatially located? For example, when my stomach hurts, I usually can point at the location of the pain, I can feel in what part of stomach the pain is localized. As far as I understand and my basic logic tells me, the brain needs to know where certain nerve endings are located spatially, the mapping of nerves and organs and the mapping of organs and their locations in my body. Does the brain learn the mapping when we grow up? Or is there another way of localizing of pain? How does the brain know where, e.g., my stomach is located spatially in my body? I honestly tried googling, but can't seem to find anything remotely helpful. Maybe someone can point me in the right direction what I can read about to understand the answer to my question (e.g., how is this phenomena called)? submitted by /u/gnomeweb [link] [comments]

When we shine a light through coloured plastic/cellophane, the light projected assumes that colour. Does this mean that the photons themselves are being coloured as the pass through the plastic? Posted: 29 Dec 2021 03:04 PM PST submitted by /u/Irishane [link] [comments]

How does a nuclear reaction actually begin? Posted: 29 Dec 2021 10:57 AM PST In a nuclear reactor, how do they get the uranium 235 to actually begin fission? I've tried to find out how but have no idea. I understand that you need a neutron to hit an atom of U235 which then splits into fission products and an average of 2.45 neutrons, but where does the first neutron come from? Do we just stick the material into a moderator I.e. water, and let stray neutrons slowly begin the reaction then use the control rods to slow it down once it's going? Or do we inject a big spike of neutrons to begin the reactions? What goes on when we need to restart the reaction? submitted by /u/Dannycrew106 [link] [comments]

What types of liquids can form oceans on planets? Posted: 29 Dec 2021 06:19 AM PST submitted by /u/Last_Bed_8523 [link] [comments]

Can explosives be detonated with sound waves? Posted: 28 Dec 2021 05:59 PM PST Can explosive compounds be agitated via sound waves (or really any type) so as to result in an explosion? If not, then why? Edit: ultimately I'm curious if, in the future, sound waves could be used to detonate minefields. submitted by /u/whereslyor [link] [comments]

Are there viruses that find sources of energy outside of cell synthesis (like eating) or are they created with a set amount of energy and must replicate before they "die"? Posted: 28 Dec 2021 02:25 PM PST Self explanatory. submitted by /u/rougekilldrone [link] [comments]

Ask Anything Wednesday - Economics, Political Science, Linguistics, Anthropology Posted: 29 Dec 2021 07:00 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! submitted by /u/AutoModerator [link] [comments]

Is there a difference in how energy is transferred due to AC current vs DC current? Posted: 29 Dec 2021 02:29 PM PST I was just watching this video about how capacitors work and the guy mentions at the end that the energy flow in a circuit isn't the kinetic energy of the electrons but the energy from the Pointing vector, which is perpendicular to both the E and B fields. I asked him for clarification in the comments, saying I thought it was because EM waves are transverse waves and he said that could work for AC but not DC, since there's no oscillation in the field with DC circuits and that he actually wasn't sure what the energy transfer mechanism is for DC current. So now I'm confused. IS the energy transfer from electricity normally a result of EM waves? It seems like it has to be, because waves inevitably transfer energy, and I see no other mechanism for energy transfer in this context, if it's not the kinetic energy of the electrons. But how can it be for DC circuits, since, as the YouTuber said, the field doesn't oscillate due to DC current. submitted by /u/dcfan105 [link] [comments]

Who was the first person who discovered that moon has reflected light? Posted: 29 Dec 2021 05:36 AM PST I already searched on google but couldn't find any source. Some say that it was leonardo da vinci, and some say that it was Anaxagoras. submitted by /u/skepticSapien [link] [comments]

How do interrupt handlers get context about what caused the interrupt? Posted: 28 Dec 2021 08:48 PM PST I've been reading about interrupts in a general sense and I understand the concept of devices or programs triggering an interrupt, which is handled by an interrupt service routine. What I don't understand is how the interrupt handler knows what exactly happened beyond "this device requested an interrupt". By "context" I mean something like pressing 'K' on a keyboard as opposed to the space bar. The keyboard sends an interrupt request to the to a hardware pin but how does that tell the computer which specific key was pressed? submitted by /u/TechnophiliusP [link] [comments]

What's the peak timeframe after a stroke when its most likely to show up on an MRI? Posted: 29 Dec 2021 08:29 AM PST Non-native English speaker here. Does someone have a graph that shows the peak time range when strokes (or TIAs) are most likely to show up on an MRI? And the time range where the stroke (or TIAs) are least likely to show up. submitted by /u/Experimentalphone [link] [comments]

Since the James Webb Telescope is collecting very low quantities of light, how do they decide where to point it? Posted: 29 Dec 2021 06:06 AM PST submitted by /u/Nature_Bum [link] [comments]

When archeologists find a fossil millions of years old, how do they determine its age if carbon dating has a limit of ~60,000 years? Posted: 28 Dec 2021 08:03 PM PST submitted by /u/MrBanana13 [link] [comments]

Does mRNA based protein synthesis happen at the same rate for everyone for a given volume of mRNA? Posted: 29 Dec 2021 09:38 AM PST I am just like fascinated by the advancements with vaccines that Covid brought. So, the Covid mRNA vaccines I understand are mRNA encapsulated with nano lipids. Cells ingest them, the golgi apparatus takes in the package, ribosomes begin reading the mRNA and translating it to amino acids. At some point the mRNA degrades. This is all my layman understanding. People have different reactions to the vaccine. It is normal, and just an immune response, it is safe and tested etc. Science effectively hijacked a specific process that happens anyway with a traditional vaccine with attenuated viruses or infection. Are people effectively getting different doses of the payload, though, where the end result is spike proteins being produced? Can people be more or less efficient at transcribing mRNA? Or does a given volume of mRNA always result in the net same amount of protein synthesis? Could that partially explain why people react differently? submitted by /u/d13f00l [link] [comments]

Why do thinly cut foods stay hard when boiled but thicker cuts go soft? Posted: 29 Dec 2021 07:34 AM PST First time father here. I've noticed when stewing/boiling apples or carrots, the ticker I cut them, the softer the get when boiled. Anyone know why? submitted by /u/Consequations [link] [comments]

Geologists and earth scientists here, what does it mean to say that a place is 60 m high from sea level? Can we dig that and get the actual sea? Posted: 28 Dec 2021 06:41 PM PST Context: I am from Nepal and it is a landlocked country with no sea or ocean. The lowest point on our geography is 59 m above sea level and i was wondering if we could dig a 60m deep hole and have sea water. I looked up The deepest hole and found it was 7 km deep. Surely it is possible to dig 60 m. Has it ever been done before? submitted by /u/Salty_Constant_9878 [link] [comments]

What are the chances of the James Webb Space Telescope being struck by space debris? Posted: 28 Dec 2021 08:12 PM PST The JWST launch has been so captivating! Its construction seems so delicate given the precision its measurements will require, though. What are the chances it sustains non-insignificant damage due to colliding with space junk over the course of its mission? submitted by /u/Soontaru [link] [comments]

What's the point of rocket fuel in space? Posted: 28 Dec 2021 12:54 PM PST Ignoring everything else, and just looking at the third law of motion, then what's the point of using combustion in space? Couldn't you just use hydrogen tanks that could just open and let the vacuum of space drag it out and create forwards motion? I mean, lighting the fuel just seems like an awful waste of energy going into heat instead of kinetic energy What is it that I don't get? submitted by /u/xXugleprutXx [link] [comments]

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