Why are interplanetary slingshots using the sun impossible?

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• Why are interplanetary slingshots using the sun impossible?
• AskScience AMA Series: I'm Susan Goldberg, Editor in Chief of National Geographic - AMA!
• What's so special about lead (Pb) that makes it block radiation? Can other elements do this?
• How Do Astronomers or Scientists Visualize Milky Way and The Exact Position of Our Solar System?
• How do our brains know how fast to make our hearts pump?
• Why don't we just coat windshields in superhydrophobic coatings instead of using windshield wipers on cars?
• What gives the purple tint to lightning bolts?
• Are there any studies done on how many people's health was affected by Deep Water Horizon?
• What is the current status of the nuclear winter hypothesis?
• Geologists: do we know or would it be possible to know if there was ever a peak taller than Mount Everest in the past?
• How do bones turn to ashes during cremation?
• Is plate tectonics unique to out planet?
• How does the mitochondria maintain its proton gradient if the outer membrane have large pores that allow large molecules like acetyl-coa to pass through?
• What happens at molecular level when water douses fire?
• If anti freeze lowers the freezing point of a fluid, wouldn’t it also lower the boiling point?
• How is TMB (tumor mutation burden) measured, and what are the limits that prevent it from clinical use at this point in time?
• Do aquatic plants have a mechanism to inhibit or deter algae growth on their leaves?
• What chemical reaction causes food to go stale?
• How could we track pluto but not the other asteroids in the belt?

Why are interplanetary slingshots using the sun impossible? Posted: 27 Jun 2019 05:51 PM PDT Wikipedia only says regarding this "because the sun is at rest relative to the solar system as a whole". I don't fully understand how that matters and why that makes solar slingshots impossible. I was always under the assumption that we could do that to get quicker to Mars (as one example) in cases when it's on the other side of the sun. Thanks in advance. submitted by /u/dracona94 [link] [comments]

AskScience AMA Series: I'm Susan Goldberg, Editor in Chief of National Geographic - AMA! Posted: 28 Jun 2019 04:00 AM PDT My name is Susan Goldberg and I'm the Editor in Chief of National Geographic. Tiny resume: 10th editor of National Geographic since it first published in 1888; 1st woman in the job; ran two major metro dailies; 40 years as a journalist; Michigan native; proud MSU j-school grad. Since I joined National Geographic in 2014, we've covered everything from gender and race to the war on science and climate change. We're all about taking National Geographic from reverence to relevance, so you'll find us across print, digital and social platforms. Two weeks ago, we started our first podcast called Overheard at National Geographic! There's a lot happening, but now's the chance to ask me anything! I'll be on at 1pm MDT / 3pm ET (19 UT). submitted by /u/AskScienceModerator [link] [comments]

What's so special about lead (Pb) that makes it block radiation? Can other elements do this? Posted: 27 Jun 2019 03:14 PM PDT submitted by /u/B2SPIRITwasTakenWTF [link] [comments]

How Do Astronomers or Scientists Visualize Milky Way and The Exact Position of Our Solar System? Posted: 28 Jun 2019 01:34 AM PDT How do they do that actually? It is like figuring your specific coordinate in a random place in Earth just with a view from your camera in monopod. I doubt that there are camera/telescope that is placed above the milky way and just take a picture of it then send to Earth when Voyager 1, the farthest camera in Earth that I know, was only 3.75 billion miles away. The same with other galaxies like Andromeda. We are surrounded with celestial bodies in all directions, so how do they exactly picture/visualize that? submitted by /u/Pervert_Spongebob [link] [comments]

How do our brains know how fast to make our hearts pump? Posted: 27 Jun 2019 04:19 PM PDT submitted by /u/hotcurry1223 [link] [comments]

Why don't we just coat windshields in superhydrophobic coatings instead of using windshield wipers on cars? Posted: 27 Jun 2019 09:36 PM PDT It's 1am and I'm tired. submitted by /u/t1r3dd [link] [comments]

What gives the purple tint to lightning bolts? Posted: 27 Jun 2019 05:44 PM PDT submitted by /u/MuscularNerd1 [link] [comments]

Are there any studies done on how many people's health was affected by Deep Water Horizon? Posted: 27 Jun 2019 10:33 PM PDT submitted by /u/Scorpionis [link] [comments]

What is the current status of the nuclear winter hypothesis? Posted: 27 Jun 2019 01:30 PM PDT What is the current status of the nuclear winter hypothesis? Is the concept of a nuclear winter supported by scientific evidence? submitted by /u/Lefty1992 [link] [comments]

Geologists: do we know or would it be possible to know if there was ever a peak taller than Mount Everest in the past? Posted: 27 Jun 2019 07:36 AM PDT submitted by /u/MonetsBeret146 [link] [comments]

How do bones turn to ashes during cremation? Posted: 27 Jun 2019 10:32 AM PDT submitted by /u/sidass [link] [comments]

Is plate tectonics unique to out planet? Posted: 27 Jun 2019 10:36 AM PDT Do other planets in our solar system, or planets we have observed outside of our system, show signs of earthquakes, volcanic activity, rift valleys? submitted by /u/InitialCareer [link] [comments]

How does the mitochondria maintain its proton gradient if the outer membrane have large pores that allow large molecules like acetyl-coa to pass through? Posted: 27 Jun 2019 10:24 PM PDT I did my own research beforehand but: one, the science speech puzzled me and I shouldn't be wondering about this an hour before my biochem exam; two, it talked about proton leaking through the inner membrane and not the outer one which is the one that I'm asking about. Thx. submitted by /u/DANDANTHEDANDAN [link] [comments]

What happens at molecular level when water douses fire? Posted: 27 Jun 2019 10:19 AM PDT submitted by /u/sidass [link] [comments]

If anti freeze lowers the freezing point of a fluid, wouldn’t it also lower the boiling point? Posted: 27 Jun 2019 03:43 PM PDT submitted by /u/turret_buddy2 [link] [comments]

How is TMB (tumor mutation burden) measured, and what are the limits that prevent it from clinical use at this point in time? Posted: 27 Jun 2019 05:17 PM PDT submitted by /u/jj200275 [link] [comments]

Do aquatic plants have a mechanism to inhibit or deter algae growth on their leaves? Posted: 27 Jun 2019 05:25 AM PDT submitted by /u/realGeorgeHuang [link] [comments]

What chemical reaction causes food to go stale? Posted: 27 Jun 2019 06:03 PM PDT submitted by /u/SavageDabber6969 [link] [comments]

How could we track pluto but not the other asteroids in the belt? Posted: 27 Jun 2019 04:34 PM PDT How did the greeks manage to observe Pluto consistently yet now we know its only one of hundreads in the belt, not even being the largest? How didn't they loose Pluto or find Eris? What makes Pluto, Ceres, Vesta or Oallas so special we could keep track of them without noticing the rest of the belt? Edit: Spelling submitted by /u/_Drion_ [link] [comments]

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How do we know that the universe is constantly expanding?

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• How do we know that the universe is constantly expanding?
• AskScience AMA Series: I'm Dr. Majdi Osman, an infectious diseases physician and Clinical Program Director at OpenBiome - a nonprofit stool bank that provides material for fecal transplants. Ask me anything!
• How do so many groups in Arabian regions cope with constant desert heat?
• If someone is a match for one organ are they a match for all?
• Can Processors Execute both branches of a conditional statement instead of predicting? Would this be faster or slower than the predict-and-reset-if-wrong method currently employed?
• Why does Osmium, in bulk form, not generate toxic Osmium tetroxide at room temperature?
• Why don't the different gases in the atmosphere separate?
• How will quantum computers be able current encryption methods?
• How do electrons "know" that the circuit is closed?
• What is the hottest manmade temperature ever recorded on Earth, and how was it created?
• Why does the Earth have a stronger gravitational pull at the poles?
• Why don't photons interact with another ones?
• You have some unknown differentiable function from reals to reals and that all functions are equally likely candidates. If you know the output of the function at two inputs, what is the expected output of the function at an input lying on the line between the two known points?
• Why does Salt make an open wound sting?
• How is antimatter stored?
• Pangaea: How did all the continents end up all crammed together in the first place?
• What is the difference between a coil gun and a rail gun?
• How does hyperthermia kill you, biologically speaking?
• What's the most accepted hypothesis (or theory) for the cause (not pathology) of autoimmune diseases?

How do we know that the universe is constantly expanding? Posted: 26 Jun 2019 12:48 PM PDT submitted by /u/Lil_Deep [link] [comments]

AskScience AMA Series: I'm Dr. Majdi Osman, an infectious diseases physician and Clinical Program Director at OpenBiome - a nonprofit stool bank that provides material for fecal transplants. Ask me anything! Posted: 27 Jun 2019 04:00 AM PDT Today is World Microbiome Day! I'm here to talk about fecal transplants and microbiome research. Fecal transplants are exactly what they sound like - taking stool from a healthy donor, carefully screening it, and transplanting it into a patient. At OpenBiome, we provide material for fecal transplants to clinicians treating patients with an infection called C. difficile, and we collaborate with researchers around the world investigating the potential of fecal transplants in other conditions, like inflammatory bowel disease, malnutrition, typhoid, food allergies and multiple sclerosis. Our Executive Director Carolyn Edelstein joined a panel at the Aspen Ideas Festival this weekend on "The Power of Poop" - you can watch it here. You can also check out our work on our website, Facebook, and Twitter. AMA! I'll be on at 11am ET (15 UT). Ask me anything! submitted by /u/AskScienceModerator [link] [comments]

How do so many groups in Arabian regions cope with constant desert heat? Posted: 26 Jun 2019 12:18 PM PDT I'm wondering more about groups that don't do a lot of trading and are semi-nomadic or completely nomadic. Many people in Arabia have full fabric covering their body, and I understand how that could help in a sandstorm, but what about the heat cooking your body under all that material? I'm sure it protects from sunburn but is it really worth the trade off, or are their clothes somehow cooling them even more? I just don't get it submitted by /u/TwentyFirstSintury [link] [comments]

If someone is a match for one organ are they a match for all? Posted: 26 Jun 2019 12:16 PM PDT I know organ transplants are really finnicky and have a lot of issues with rejection, but I'm curious - if someone is a match for, say, a heart transplant, does that mean they're a match for kidneys too? submitted by /u/stealthmissionary [link] [comments]

Can Processors Execute both branches of a conditional statement instead of predicting? Would this be faster or slower than the predict-and-reset-if-wrong method currently employed? Posted: 26 Jun 2019 12:40 PM PDT According to a book on computer science I am reading, when a conditional statement occurs in code the processor will predict which option will be taken and begin instructions while another part of the processor checks which branch was the correct one, as a way to make better use of parallelism in modern processors. If the processor guesses right it continues on, but if it guessed incorrectly then it has to throw out all the work after the statement and start over from the branch, this time choosing the other path. This incurs a large performance penalty. ​ I am wondering, is it possible to have the processor execute both branches? Most likely it would be slower than a correct guess in the current method, but it also removes the risk of being wrong. Is this currently employed? Would it require new processor technology that is not feasible currently? Do the prediction mechanisms guess correctly often enough that it would reduce speed to evaluate both branches? Is there another factor that I don't know about? ​ Thanks in advance! submitted by /u/Kesseleth [link] [comments]

Why does Osmium, in bulk form, not generate toxic Osmium tetroxide at room temperature? Posted: 26 Jun 2019 08:29 PM PDT According to all the information I can find, including some chemistry text-books and "processing guideline" manuals, bulk Osmium is considered generally safe, because it does not produce toxic osmium tetroxide at room temperature (only above 400C). Powdered osmium sponge, on the other hand, transforms into osmium tetroxide at room temperature. My question is: Why does a block of osmium not constantly form a small amount of osmium tetroxide on its surface? Osmium tetroxide can't form a protective layer on the surface, as it is a liquid (and it can evaporate), so why is oxidation not continually occurring? I get that it has less surface area than a powder, but so does a chunk of iron vs iron powder, and iron chunks still rust, hence my confusion. submitted by /u/Natolx [link] [comments]

Why don't the different gases in the atmosphere separate? Posted: 26 Jun 2019 12:59 PM PDT All those gases have different densities, so why isn't the nitrogen (28g/mol) floating on top of the oxygen (32g/mol)? In other words, what keeps our atmosphere homogeneous? submitted by /u/merdouille44 [link] [comments]

How will quantum computers be able current encryption methods? Posted: 27 Jun 2019 03:55 AM PDT I have a very basic understanding of what quantum science is and how encryption/hashing works. I keep seeing various news/blog sites saying that quantum computers will be able to easily break current encryption methods (implied near future) My understanding of quantum computers is that we can store qubits. These can be a superposition of 1 AND 0, but we still need conventional computers and binary to input data into qubits, and to return the value of the qubits at a given time analogous to opening schroedingers box. The superposition no longer exists and a binary outcome is observed. Now I also saw someone say that (N qubits = 2N bits) This is incredible scaling but we can't even make a quantum computer that comes close to a conventional computer. We also use conventional computer and binary as input and output even when doing quantum computing... so what is the significance of the qubits anyway? How would any of this break encryption? If someone could also explain why qubits scale this way - since the output is regular binary? A qubit can be a superposition of 0 and 1 but it can only return one or the other when asked. How does this enable say 3qbits to equal 8bits? submitted by /u/nekowaiidesu [link] [comments]

How do electrons "know" that the circuit is closed? Posted: 26 Jun 2019 11:10 PM PDT Imagine a battery with 2 loose copper wires, attached to each terminal (+) and (-) of a battery. Connect the loose wire end which comes from the (-) terminal to a light bulb: the light bulb stays turned off. Of course, because there's no current. That means that the electrons inside the wire and the light bulb are not moving. Now connect the other loose wire end which comes from the (-) terminal to the light bulb, closing in fact the circuit: Magic, the light bulb lights up! Interpretation: That means that the electrons inside all the circuit are now moving. But how did the electrons "know" that the circuit is now closed? If we picture the electric current as a water flow: Normally, even connecting the light bulb on only one wire would trigger the light bulb to ignite, even for a brief period of time: the battery is "pushing" the electrons so they are pushed into this new part of the metal which is the light bulb. And another problem of this imaginary picture: if the battery is pushing the electron, the last element of the circuit (the closest to the (+) battery terminal would be pushed later than the first ones? But in fact, you could have a 10m or a 30cm circuit, all the light bulbs inside the circuit will light up instantly. submitted by /u/presse_citron [link] [comments]

What is the hottest manmade temperature ever recorded on Earth, and how was it created? Posted: 26 Jun 2019 04:25 PM PDT submitted by /u/gkmwheelspin [link] [comments]

Why does the Earth have a stronger gravitational pull at the poles? Posted: 26 Jun 2019 10:41 PM PDT I understand the rotation of the earth creates a relative "force" that goes against gravity and is strongest at the equator, but the earth is wider at the equator because of this. Being wider I would imagine would mean more gravitational force. Shouldn't Earth continue to "flatten" until gravity is fairly universal all over? submitted by /u/Eatenplace7439 [link] [comments]

Why don't photons interact with another ones? Posted: 26 Jun 2019 09:05 AM PDT submitted by /u/Mega2223 [link] [comments]

You have some unknown differentiable function from reals to reals and that all functions are equally likely candidates. If you know the output of the function at two inputs, what is the expected output of the function at an input lying on the line between the two known points? Posted: 27 Jun 2019 12:00 AM PDT Keeping in mind that any differentiable function is equally likely, I would guess the answer would be the value found by linear interpolation between the two known points. Is my intuition off? I'm also interested in topics to search to answer questions like this because I have no idea where to start. submitted by /u/save_scummer [link] [comments]

Why does Salt make an open wound sting? Posted: 26 Jun 2019 01:23 PM PDT submitted by /u/NoahVincenzo [link] [comments]

How is antimatter stored? Posted: 26 Jun 2019 02:42 PM PDT As the title is. Wouldn't the antimatter collide with matter of a normal container and annihilate? I don't know much about antimatter but I'm interested. Any help and explanation will be greatly appreciated. Thank you! submitted by /u/BigManSilverNugget [link] [comments]

Pangaea: How did all the continents end up all crammed together in the first place? Posted: 26 Jun 2019 08:22 PM PDT It seems really weird to me that all the above‐water landmasses would start out all clustered together on the same side of the planet, instead of more‐or‐less randomly distributed across the earth's like they are now (except, you know, a different more‐or‐less random distribution, presumably). How did they get that way? submitted by /u/BrokenEye3 [link] [comments]

What is the difference between a coil gun and a rail gun? Posted: 26 Jun 2019 10:07 PM PDT the title pretty much says it all. Are they pretty much identical mechanically? submitted by /u/DukeV22 [link] [comments]

How does hyperthermia kill you, biologically speaking? Posted: 26 Jun 2019 03:57 PM PDT Looked a bit at the wiki page. It tells you what symptoms you get at various temperatures, and the maximum temperature you can survive in until you're likely to die. But it doesn't go into much detail in regards to the exact biological mechanism that hyperthermia kills you, only that it does. More curious than anything else. I'm intrigued by the fact that the human body seems to have a very 'narrow' temperature range it can survive in, in both directions. submitted by /u/MayaFey_ [link] [comments]

What's the most accepted hypothesis (or theory) for the cause (not pathology) of autoimmune diseases? Posted: 26 Jun 2019 11:04 PM PDT submitted by /u/baselq1996 [link] [comments]

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When the sun becomes a red giant, what'll happen to earth in the time before it explodes?

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• When the sun becomes a red giant, what'll happen to earth in the time before it explodes?
• How do cells 'know their location' and grow to make reproducible complex shapes such as a heart?
• Do plasmids only exsit in intracelluarly or extracelluarly as well? How do they come to be in the extracelluar enviorment, how long are the viable outside of a host, and how are they taken up by cells that encounter them?
• Is it worse for the environment to ride a motorbike from London to Zürich, or to fly from London to Zürich?
• If you can use an antenna to produce electromagnetic waves and visible light is electromagnetic radiation, why you can't tune an antenna to produce waves in that length and make light this way?
• Why do chemical properties of elements change as you move from left to right across the periodic table?
• Does glass buildings contribute to global warming?
• How do we know that the brain uses a significant amount of energy?
• Why does Grapefruit have an adverse reaction with many medicines / drugs?
• Why is it so expensive to extract gold from ore?
• How do Roombas (or other AI vacuum cleaners) sense their surrounds so they can move safely?
• Why are asymmetrical internet connections so common in residential ISP offerings? What technical reason prevents the ISP from offering a symmetrical connection? Why do fiber-to-the-home providers seem to be more able to offer a symmetrical connection?
• Does the electromagnetic force have a similar affect on space-time as gravity?
• Why do bound electrons ignore photons that can't be absorbed instead of maybe interacting through a scattering effect?
• How do apples grow? Specifically, where are the organic compounds which make up the apple synthesized,and how are they transported into the right place in the growing apple?
• How do epidurals work?
• Are all the seeds a plant produces genetically identical?
• Do places on earth see full days (no sunset) but not full nights (no sunrise) or vice versa during and full earth year?
• Is there a pi bond in graphene?
• If CO is called carbon monoxide to differentiate it from CO2, why isn't NO most commonly called nitrogen monoxide, rather than nitric oxide, to differentiate it from NO2?
• An infinitely long line made into a circle?
• Is draft/draught harmful?

When the sun becomes a red giant, what'll happen to earth in the time before it explodes? Posted: 25 Jun 2019 05:45 PM PDT submitted by /u/Kyuubi_Fox [link] [comments]

How do cells 'know their location' and grow to make reproducible complex shapes such as a heart? Posted: 25 Jun 2019 09:40 PM PDT It is a hard question to phrase but I'll try my best. For example how does the arota in the heart grow on the exact same place of the heart with relatively the same shape, diameter, same 3 ports on the top of aorta, etc. How does the heart always get its distinct shape? If you look from the perspective of the cell's point-of-view the bottom and the top of the heart look the same. All that the cell sees is a few other heart cells near it, it would seem that it couldn't tell if its on the top or bottom. How does the heart know to stop growing in size? 'There is no cell that can see/sense the heart as a whole' and determine the heart is fully developed. Do we know what in DNA codes for shape and more importantly how that process is actually carried out through biochemistry. I just used the heart as an example. Maybe a better example is how the ear grows is distinct folds and lobes. Or how teeth grow into their shape (think of the top of a molar) and consider that the enamel isn't even cellular. submitted by /u/IHateTexans [link] [comments]

Do plasmids only exsit in intracelluarly or extracelluarly as well? How do they come to be in the extracelluar enviorment, how long are the viable outside of a host, and how are they taken up by cells that encounter them? Posted: 26 Jun 2019 05:17 AM PDT I am interested in learning how and how frequently plasmids, transposons, and integrons transfer between hosts without conjugative elements involved, and how common it is for pathogenic gammaproteobacteria to incorporate new genetic material from the environment. submitted by /u/Wulfofhillsborough [link] [comments]

Is it worse for the environment to ride a motorbike from London to Zürich, or to fly from London to Zürich? Posted: 26 Jun 2019 03:44 AM PDT Later this year I might be making a trip to Switzerland. I'm curious about whether or not I'd be damaging the environment more or less if I went there by motorbike instead of flying. The motorbike specifically that I would use is a 2016 Triumph Trophy. It has a 1200cc triple cylinder engine. I imagine I would use less fuel by motorbiking, but I also realise that motorbikes can be quite polluting (even more than cars, because of a lack of research and development into it). Thanks! submitted by /u/themusicalduck [link] [comments]

If you can use an antenna to produce electromagnetic waves and visible light is electromagnetic radiation, why you can't tune an antenna to produce waves in that length and make light this way? Posted: 26 Jun 2019 05:03 AM PDT submitted by /u/Constant__Pain [link] [comments]

Why do chemical properties of elements change as you move from left to right across the periodic table? Posted: 26 Jun 2019 02:28 AM PDT submitted by /u/JohnyJohny482 [link] [comments]

Does glass buildings contribute to global warming? Posted: 26 Jun 2019 03:40 AM PDT I recently moved to an apartment in São Paulo and i got sunlight at the window in the morning and also afternoon. It took a week to realise that in both times, its a reflection from the glass buildings that surround my apartment. Does that somehow contributes to how the temperatures are going higher? submitted by /u/vitorrossini [link] [comments]

How do we know that the brain uses a significant amount of energy? Posted: 25 Jun 2019 11:27 AM PDT Additionally, how do we how how much energy any part of our bodies use? Is it an estimation? Is there a physical experiment or calculation? submitted by /u/Elfabetagamma [link] [comments]

Why does Grapefruit have an adverse reaction with many medicines / drugs? Posted: 26 Jun 2019 04:28 AM PDT submitted by /u/meecan [link] [comments]

Why is it so expensive to extract gold from ore? Posted: 26 Jun 2019 12:17 AM PDT submitted by /u/QueenLaniakea [link] [comments]

How do Roombas (or other AI vacuum cleaners) sense their surrounds so they can move safely? Posted: 25 Jun 2019 05:42 PM PDT Edit: surroundings submitted by /u/be_happy_my_friend [link] [comments]

Why are asymmetrical internet connections so common in residential ISP offerings? What technical reason prevents the ISP from offering a symmetrical connection? Why do fiber-to-the-home providers seem to be more able to offer a symmetrical connection? Posted: 25 Jun 2019 09:27 PM PDT I understand that the asymmetrical connection matches the average residential internet user's habits, but what specifically prevents certain ISPs, mainly cable and DSL, from offering symmetrical speeds? submitted by /u/beerigation [link] [comments]

Does the electromagnetic force have a similar affect on space-time as gravity? Posted: 25 Jun 2019 11:55 PM PDT Or any other fundamental force. If not why is gravity the only one; and consequently identified as a "fundamental force", when it would be more appropriate to call it a mere side effect of Existence? submitted by /u/Shmow-Zow [link] [comments]

Why do bound electrons ignore photons that can't be absorbed instead of maybe interacting through a scattering effect? Posted: 25 Jun 2019 11:37 PM PDT To my knowledge, I was told that bound electrons completely ignore photons that don't have the required energy level needed to "jump." I also know that a photon with that has higher energy than the work function will completely free the electron from the atom and the difference in energy is transferred over as kinetic energy in the electron, which I believe is the photoelectric effect. What I'm not sure about is what happens while the electron is still bound and the incident photon is of a different wavelength than can be absorbed. submitted by /u/_Sunny-- [link] [comments]

How do apples grow? Specifically, where are the organic compounds which make up the apple synthesized,and how are they transported into the right place in the growing apple? Posted: 26 Jun 2019 02:36 AM PDT submitted by /u/AllanfromWales1 [link] [comments]

How do epidurals work? Posted: 25 Jun 2019 09:56 AM PDT I feel like I've heard a lot of differing answers on this, particularly in regard to child birth. From "the woman doesn't feel a thing" to "the woman feels everything but doesn't remember the pain." Well, what is the actual mechanism? Is the medicine blocking some function in the brain? Is it numbing? Just curious, thanks! submitted by /u/hommusamongus [link] [comments]

Are all the seeds a plant produces genetically identical? Posted: 25 Jun 2019 11:14 AM PDT submitted by /u/weavester1 [link] [comments]

Do places on earth see full days (no sunset) but not full nights (no sunrise) or vice versa during and full earth year? Posted: 25 Jun 2019 02:48 PM PDT Is there a location(s) on the earth where at different times of the year the place (presumably near the artic/antarctic circle) would experience 24 hours without sunrise but NOT 24 hours without sunset (or vice versa) due to small variations in the axial tilt of the earth over time? submitted by /u/bd2510 [link] [comments]

Is there a pi bond in graphene? Posted: 25 Jun 2019 10:51 AM PDT I understand the sp2 hybridisation but is the remaining p orbital involved in bonding. If not what is this double bond shown in many illustrations. If so where do the delocalised electrons come from? submitted by /u/171727282982722 [link] [comments]

If CO is called carbon monoxide to differentiate it from CO2, why isn't NO most commonly called nitrogen monoxide, rather than nitric oxide, to differentiate it from NO2? Posted: 25 Jun 2019 08:02 AM PDT On that note, why is NO most commonly called nitric oxide, rather than nitrogen oxide? Why isn't NO2 called nitric dioxide instead? Are these all just the result of naming conventions, or do they serve a specific purpose? submitted by /u/zacharyangrk [link] [comments]

An infinitely long line made into a circle? Posted: 25 Jun 2019 12:26 PM PDT My question might be odd but i can't figure it out or come to a conclusion. So if i had an infinitely long line and turned it into a circle, the circle is infinitely long but has to end because a circle is a closed loop. Infinity can't end tho, as it goes on forever? Or am i just misunderstanding something? Any thoughts and answers are appreciated, thanks! submitted by /u/Austinpouwers [link] [comments]

Is draft/draught harmful? Posted: 25 Jun 2019 06:35 AM PDT The Germans I know are very sure draughts are harmful, at the very least it gives you stiff necks, colds and ear infections. In response to the German heat wave, the German Red Cross just tweeted out: "Draught is not harmful, only Germans believe that." https://twitter.com/DRKLoehne/status/1143057290242772992 They say: draught is no different from wind. https://twitter.com/DRKLoehne/status/1143141583686131712 But when you are exposed to wind, you are outside and typically moving. And I would guess draught is more laminar, less turbulent flow. What does science say about this issue? submitted by /u/VictorVenema [link] [comments]

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