Does the velocity of a photon change?

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• Does the velocity of a photon change?
• When your body responds to changes in temperature by doing things like sweating or shivering, is it our minds’ perception of the temperature that causes this or does the temperature somehow directly do this?
• What exactly composes the taste of freezer burn? Is it a chemical in the food that tastes like freezer burn?
• Do recreational drugs effect different ethnic groups differently?
• Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology
• How do you determine the amount of CO2 in the air in the past?
• Does alcohol consumption have permanent negative effects on a person's intelligence?
• Why do we sometimes keep strong memories of mundane or unimportant events in our lives? Is there a specific reason why we do so?
• Under what circumstances could a sea or ocean become carbonated, like a tonic water?
• Why do fast-moving things appear as a blur? Theoretically what would it take for us to increase our visual "framerate"?
• how are electrons able to produce magnetic field inside an orbital. how does changes in spin up and spin down motion changes the overall magnetic field of an atom?
• What is the chemistry behind pop rocks?
• If photons lose kinetic energy when colliding with objects but by definition travel at the speed of light and have no mass, where does that energy come from? Can a photon’s energy level be reduced to the point of being below the speed of light?
• Is there a venom that isn't a poison?
• What does this chemical notation mean?
• How do most antidepressant drugs cause weight gain?
• When Venus was in the Goldilocks zone, what would potential life have been like with it’s retrograde rotation?
• Insects, with their compound eyes, don't have irises like mammals, etc, do. Our irises help protect our retinas from damage in bright light while letting us see okay in dark light still. Do insects forego this versatility? Or do they solve it some other way?
• Do languages that read from right to left think of time as progressing from right to left?
• What do we use our current super computers for? And why do we need for powerful ones?
• Is there a rigorous definition of “information”?
• How do we know that different animals see more colors than us?

Does the velocity of a photon change? Posted: 18 Apr 2018 04:39 AM PDT When a photon travels through a medium does it's velocity slow, increasing the time, or does it take a longer path through the medium, also increasing the time. submitted by /u/jpn1405 [link] [comments]

When your body responds to changes in temperature by doing things like sweating or shivering, is it our minds’ perception of the temperature that causes this or does the temperature somehow directly do this? Posted: 18 Apr 2018 05:39 AM PDT Since that was probably a confusing title, here's an example: if you were sitting in the snow and it was below freezing out, yet somehow in your mind you were completely convinced that it was warm out and that you weren't cold at all, despite your internal temperature dropping, would you still start shivering? submitted by /u/CoalVein [link] [comments]

What exactly composes the taste of freezer burn? Is it a chemical in the food that tastes like freezer burn? Posted: 18 Apr 2018 06:53 AM PDT Not asking how freezer burn happens, but rather once it happens, what are the constituents of the taste? submitted by /u/GregJamesDahlen [link] [comments]

Do recreational drugs effect different ethnic groups differently? Posted: 18 Apr 2018 05:52 AM PDT I'm not trying to sound or be racist racist. I'm curious about the effects of drugs on different ethnic groups. I believe certain drugs may effect people with certain DNA SNP's differently. I put my DNA into a SNP reader and it says I could have poor metabolization to certain medications. So I was wondering if the effects of say alcohol on someone who's say British/Irish ethnicity would differ to someone who's say Japanese ethnicity. submitted by /u/whoknowwhatthatmean [link] [comments]

Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology Posted: 18 Apr 2018 08:13 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Biology, Chemistry, Neuroscience, Medicine, Psychology 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]

How do you determine the amount of CO2 in the air in the past? Posted: 18 Apr 2018 03:48 AM PDT Specifically for time periods before the formation of permenant ice caps? Asking because I got curious after a PBS Eons episode on the Paleogene-Eocene Thermal Maximum. submitted by /u/SomewithCheese [link] [comments]

Does alcohol consumption have permanent negative effects on a person's intelligence? Posted: 18 Apr 2018 03:19 AM PDT submitted by /u/ID00001 [link] [comments]

Why do we sometimes keep strong memories of mundane or unimportant events in our lives? Is there a specific reason why we do so? Posted: 17 Apr 2018 12:11 PM PDT We can recall very insignificant things like a statement, joke, image, or object from a particular moment even if we sometimes forget everything else about it. These memories can also feel very lucid, kind of like the popular statement, "I remember like it happened yesterday". Do we know the process behind it? submitted by /u/Kaleidostorm [link] [comments]

Under what circumstances could a sea or ocean become carbonated, like a tonic water? Posted: 17 Apr 2018 07:18 PM PDT submitted by /u/Hydro_Master364 [link] [comments]

Why do fast-moving things appear as a blur? Theoretically what would it take for us to increase our visual "framerate"? Posted: 18 Apr 2018 02:00 AM PDT For example the blades of a fan appear as a blur. Is there any theoretical way to see each blade moving separately? Or is it just the way light works? submitted by /u/xplosiveshake [link] [comments]

how are electrons able to produce magnetic field inside an orbital. how does changes in spin up and spin down motion changes the overall magnetic field of an atom? Posted: 18 Apr 2018 12:02 AM PDT so i know that in bohr's theory it is simple to know the magnetic moment of an electron revolving around a nucleus cause it is an orbit and performing circular motion. But in an orbital where motion of electron is not specified, how are we able to know the magnetic moment it produces, by knowing the spin of the electron? and then how are we able to categorize the nature of an element in para, dia, ferro, ferri, anti-ferri? just on the basis of electron's spin????? submitted by /u/JordaNova73 [link] [comments]

What is the chemistry behind pop rocks? Posted: 17 Apr 2018 03:47 PM PDT What reaction causes the popping sensation? submitted by /u/erik2420 [link] [comments]

If photons lose kinetic energy when colliding with objects but by definition travel at the speed of light and have no mass, where does that energy come from? Can a photon’s energy level be reduced to the point of being below the speed of light? Posted: 17 Apr 2018 05:25 PM PDT submitted by /u/falcon537 [link] [comments]

Is there a venom that isn't a poison? Posted: 18 Apr 2018 01:50 AM PDT The difference between poison and venom to my low biology knowledge is that the former kills you after you ingest it while later kills you after it gets into your bloodstream. So is there any venom that can be safely digested? submitted by /u/DreamerGhost [link] [comments]

What does this chemical notation mean? Posted: 18 Apr 2018 01:30 AM PDT I was recently in the Natural History Museum in London, where there is a wonderful geology room filled with hundreds of rocks and minerals. Looking through these I stumbled upon a chunk of Empressite which was tagged with the chemical formula: Ag5-xTe3 What does the (5-x) mean? (Apologies for the use of superscript - I have no idea how to subscript.) submitted by /u/FaustsDaemon [link] [comments]

How do most antidepressant drugs cause weight gain? Posted: 17 Apr 2018 02:32 PM PDT Do they make us eat more? Does it change the metabolism? Can they be used in anorexia? submitted by /u/zorbix [link] [comments]

When Venus was in the Goldilocks zone, what would potential life have been like with it’s retrograde rotation? Posted: 18 Apr 2018 04:34 AM PDT submitted by /u/LEVITlCUS [link] [comments]

Insects, with their compound eyes, don't have irises like mammals, etc, do. Our irises help protect our retinas from damage in bright light while letting us see okay in dark light still. Do insects forego this versatility? Or do they solve it some other way? Posted: 17 Apr 2018 03:21 PM PDT submitted by /u/StarManta [link] [comments]

Do languages that read from right to left think of time as progressing from right to left? Posted: 17 Apr 2018 02:41 PM PDT As an English speaker I, and I assume most people, think of time progressing in the forward direction to the right. For example when plotting a time line, the most recent events would be to the right, and historic events to the left. Does the direction of reading affect this? submitted by /u/thuww [link] [comments]

What do we use our current super computers for? And why do we need for powerful ones? Posted: 17 Apr 2018 02:54 PM PDT submitted by /u/Jumpingeal [link] [comments]

Is there a rigorous definition of “information”? Posted: 17 Apr 2018 04:18 PM PDT Is there a rigorous definition in physics of what constitutes information? Is there a difference between a hydrogen atom and a Collected Works of William Shakespeare outside of pure physical composition? How does that difference relate to the black hole information paradox? submitted by /u/gsg121 [link] [comments]

How do we know that different animals see more colors than us? Posted: 17 Apr 2018 02:59 PM PDT I've been researching on color lately and how we look at it. I found a few articles that talk about how animals see more colors than us but none of them really explain it. Is there any evidence that they for sure do see more colors than us and how this been proven? submitted by /u/R3w1 [link] [comments]

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What happened with Zika, is it gone now?

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• What happened with Zika, is it gone now?
• How was the newly found huge Japanese "rare earths" deposit formed?
• In the ISS, how do astronomers keep the station clean?
• How does a viscous disinfectant hand gel become more liquid when rubbing it?
• Why are many Midwest US farms harvested/grown in circular patterns?
• If I donate blood, will my blood pressure lower?
• Why did NASA send Rovers (spirit, curiosity, Opportunity) to Mars but destroy Cassini?
• How does a CFC (e.g. CCl2F2), a heavier than air gas, reach the stratosphere, over 20 miles above sea level?
• What can cause bears to not make it through hibernation?
• Are Cerenkov radiation and Landau damping related?
• People generally have the same joints in their bodies with size being the main difference between individuals. Besides injury and medical conditions, what else causes people to have different gaits when they walk or run?
• How do you perform an eye test on a baby or toddler when they can't communicate verbally?
• Does reading/learning to read sheet music activate the same regions of the brains as reading/learning to read a foreign language ?
• How can we be so sure that species of theropods like Yutyrannus were feathered, but have a hard time finding out if others like the T.Rex were fully covered with feathers or were only feathered in certain regions?
• How did we discover plasma? (The 4th State of Matter)
• Why is space equipment/satellites/rocketry assembled and kept in clean room environments?
• How do other baryons behave inside atomic nuclei?
• What is it about the digestive system of animals that makes them able to raw meat, whereas it would make a human sick?
• Are there any methods of recording uncertainties without observing them?
• Why is neutron degeneracy pressure "stronger" than electron degeneracy pressure?
• How can we use The Doppler Effect to calculate the exact trajectory and speed of an object?
• How fast do radioactive things boil water?

What happened with Zika, is it gone now? Posted: 17 Apr 2018 05:24 AM PDT submitted by /u/LEVITlCUS [link] [comments]

How was the newly found huge Japanese "rare earths" deposit formed? Posted: 16 Apr 2018 01:47 PM PDT Link to the story So the higher elements are formed inside Super Novae and then spewed out into the galaxy where they mix with other clouds of matter that eventually became our solar system and planet. So they have been around for billions of years before and billions of years since becoming part of the Earth. But why are they so dense in just this one area and why are they in the form of mud? Also, how likely is it that there are many more of these yet to be discovered? submitted by /u/Emu_or_Aardvark [link] [comments]

In the ISS, how do astronomers keep the station clean? Posted: 17 Apr 2018 04:25 AM PDT Dust (food, human dead cells...) stay in there. Do they "hoover" the environment? Which technologies do they have to do it? submitted by /u/EtG_Gibbs [link] [comments]

How does a viscous disinfectant hand gel become more liquid when rubbing it? Posted: 17 Apr 2018 04:16 AM PDT Even when I merely apply some on my hand and not rub it, it will become more runny on the surface of my palm. I guess it has something to do with the alcohol? Can someone explain? Thanks! submitted by /u/AIforce [link] [comments]

Why are many Midwest US farms harvested/grown in circular patterns? Posted: 16 Apr 2018 11:28 PM PDT Maybe this gravitates more towards agriculture, but I believe r/askscience can justify an answer. In scanning Google Maps in regions of Kansas, Nebraska, and other parts of the United States Midwest, I'm wondering where large regions of land are being farmed/harvested in (nearly) perfect circular patterns? Is there an agricultural benefit to doing so? Google Maps link here submitted by /u/Savanty [link] [comments]

If I donate blood, will my blood pressure lower? Posted: 16 Apr 2018 10:21 PM PDT Will it lower significantly? How long would the pressure be abnormal? submitted by /u/ouiouibitch [link] [comments]

Why did NASA send Rovers (spirit, curiosity, Opportunity) to Mars but destroy Cassini? Posted: 16 Apr 2018 11:05 PM PDT To the best of my little knowledge about planetary science, we crashed Cassini into Saturn's atmosphere; so that Enceladus, Titan would be unadulterated by any microbes because there is a slight chance they might be habitable for future generations. If so, why then did we land rovers on Mars as they may have carried microbes to Martian surface? submitted by /u/Eclipsespirit [link] [comments]

How does a CFC (e.g. CCl2F2), a heavier than air gas, reach the stratosphere, over 20 miles above sea level? Posted: 17 Apr 2018 03:46 AM PDT submitted by /u/rickdidnothingwrong [link] [comments]

What can cause bears to not make it through hibernation? Posted: 17 Apr 2018 07:20 AM PDT Are there thresholds for how much body fat they need to have gained by the end of the summer? Do we know of sets of circumstances that can lead to them not making it through the winter? submitted by /u/QuirksNquarkS [link] [comments]

Are Cerenkov radiation and Landau damping related? Posted: 16 Apr 2018 10:56 PM PDT I was told recently that wave-particle resonances for waves travelling at the frequency of the particle's parallel velocity were Landau or Cerenkov resonant since the particle effectively feels a wave of zero frequency. Perhaps I am simply missing something very obvious, but why does this condition correspond to both Landau and Cerenkov resonance? One is simply wave damping (or growth) on particles with thermal speeds corresponding to the wave's phase velocity, while the other denotes radiation emitted from a medium where the particle's motion exceeds the local speed of light. What's the commonality with the above wave-particle resonance? submitted by /u/CallMeDoc24 [link] [comments]

People generally have the same joints in their bodies with size being the main difference between individuals. Besides injury and medical conditions, what else causes people to have different gaits when they walk or run? Posted: 16 Apr 2018 03:43 PM PDT submitted by /u/Watts300 [link] [comments]

How do you perform an eye test on a baby or toddler when they can't communicate verbally? Posted: 16 Apr 2018 09:35 AM PDT submitted by /u/The_Demolished_Man [link] [comments]

Does reading/learning to read sheet music activate the same regions of the brains as reading/learning to read a foreign language ? Posted: 16 Apr 2018 03:44 PM PDT submitted by /u/Sna__ [link] [comments]

How can we be so sure that species of theropods like Yutyrannus were feathered, but have a hard time finding out if others like the T.Rex were fully covered with feathers or were only feathered in certain regions? Posted: 16 Apr 2018 05:29 PM PDT submitted by /u/Graysonspop4444 [link] [comments]

How did we discover plasma? (The 4th State of Matter) Posted: 16 Apr 2018 02:11 PM PDT How exactly did we discover plasma? Have we ever heated gas hot enough to create plasma in a lab environment? Does plasma have an adverse effects upon the human body when exposed? submitted by /u/olleh74 [link] [comments]

Why is space equipment/satellites/rocketry assembled and kept in clean room environments? Posted: 16 Apr 2018 05:46 PM PDT submitted by /u/RedHotLamp [link] [comments]

How do other baryons behave inside atomic nuclei? Posted: 16 Apr 2018 10:43 PM PDT Neutrons decay in free space, but are apparently stable inside some atomic nuclei. In other nuclei protons decay. Are there theories or experiments describing how the stability of other baryons are affected? I've found quite a few interesting papers on hypernuclei which I am working through, but very little more easily digested material. Also the papers I have read so far have all discussed the properties of the nucleus itself, mostly binding energy, but not the affects on the constituent baryons. It seems to me that if the half-life of neutrons can be increased by 1020 times, then a lambda baryon which usually decays in under a nanosecond might last for a more human scale timeframe, seconds or years, or even be effectively stable. I also see that the additional binding energy in light nuclei when a hyperon is added is up to around a tenth the mass of the strange quark, which suggests to me that it will be energetically favourable for the strange quark to decay even if the entire nucleus is then left unstable, but is near enough in scale I would expect some change to the decay. Has there been research on heavier hypernuclei, like iron or lead? Thanks. submitted by /u/suoirucimalsi [link] [comments]

What is it about the digestive system of animals that makes them able to raw meat, whereas it would make a human sick? Posted: 16 Apr 2018 01:42 PM PDT I feel like all other carnivores have the ability to eat raw meat, but humans do not. Do they have some part of their metabolism that allows this? Or would humans be able to do it as well if we took time to slowly eat more and more raw meat? Additionally, I've heard theories that cooking food is part of why humans are more intelligent than other creatures. Our bodies don't have to use the extra energy to break down the already cooked food, so it goes into our cognitive processes instead. Feel free to expand on that too. Thanks for the insight! submitted by /u/SilverSwizz [link] [comments]

Are there any methods of recording uncertainties without observing them? Posted: 16 Apr 2018 04:27 PM PDT Quantum Mechanics has many particles and functions which are in a state of uncertainty until they are observed, where they collapse into a single state. My question is, are there any methods, theoretical or real, to record such things for future observation? For example, is it possible to freeze a quantum state in time so that it may be observed later on, and the data recorded? And as a further question, in quantum mechanics, what exactly counts as observation? Is it only human observation, or can it also be animal observation? What about mechanical? And does changing the observer create a difference in the observed state? submitted by /u/yay855 [link] [comments]

Why is neutron degeneracy pressure "stronger" than electron degeneracy pressure? Posted: 16 Apr 2018 10:29 AM PDT A white dwarf collapses into a neutron star when its mass overwhelms electron degeneracy pressure, and its mass gets compressed into neutrons. A neutron star collapses into a black hole when its mass overwhelms neutron degeneracy pressure, and its mass gets compressed into (???). But the neutron star collapse clearly happens at a higher mass than a white dwarf collapse. This would seem to imply that neutron degeneracy can support greater pressure than electron degeneracy. Why is that, given that they are both (in my understanding) governed by the same Pauli exclusion principle? submitted by /u/playful_pachyderm [link] [comments]

How can we use The Doppler Effect to calculate the exact trajectory and speed of an object? Posted: 16 Apr 2018 05:33 PM PDT Ok, so I understand the basics of The Doppler Effect: when an object is travelling towards you, it compresses and shortens the perceived wavelength of light/sound emitted. When it is travelling away, it increases the perceived wavelength. The thing that I don't understand is how we can calculate an objects exact trajectory. For example, if an object is going in a direction perpendicular to the distant between you and the object, no matter how fast it is going, there would be no Doppler Shift, since said object isn't moving towards or away from you. Am I mistaken in that the Doppler Effect can only determine movement in one axis? Or is there some other way to detect the object's movement? submitted by /u/Superslayer514 [link] [comments]

How fast do radioactive things boil water? Posted: 16 Apr 2018 03:10 PM PDT I read somewhere that nuclear power was just using nuclear things to boil water and using the steam to spin a turbine. Is it really that much more effective than burning something else to do the same thing? Also is that the best way to be using nuclear power? I imagined it would have been way more complicated than boiling water. submitted by /u/ilikebutteryfries [link] [comments]

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

Why do cognitive abilities progressively go down the more tired you are, sometimes to the point of having your mind go "blank"?

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• Why do cognitive abilities progressively go down the more tired you are, sometimes to the point of having your mind go "blank"?
• Why can't I receive information from the future via delayed choice quantum eraser with a different beam splitter?
• What determines which X chromosome becomes active during the X inactivation process?
• In the winter underneath frozen streams and rivers, what microbial colonies live there and thrive there?
• What is the scientific/biological reason for wanting to squeeze anything we deem cute?
• Are eyes like telescopes? The bigger they are the more light they can detect? If so how big would they have to be in order to see nebulae unassisted?
• How is caffeine removed from coffee?
• What makes our sunsets so beautiful and vibrant on some evenings, and others not so vibrant?
• Is it possible to create a molecule containing a noble gas ?
• In reactions (chemical or nuclear) where light is a product, is there an acceleration phase that photons undergo or do they simply exist at C?
• Structurally, how can you tell the difference between the aorta and superior vena cava?
• A creationist told me that science, under uniformitarianism, basically assumes that things have always occured as they do now. Is this true? If it's true isn't that a problem?
• Can dogs have recessive genes show up in later generations?
• Does driving a nail into a tree actually "hurt" it?
• Has a gravitational force been observed between massless particles?
• Has there ever been a documented instance where a planet in a binary star system orbits in a figure 8 motion around both stars?
• How does magnetic field density behave when there is more than one wire generating current? Is it cumulative, or is it more complicated than that?
• Would it be possible to build telescope using long pipes or multiple sheets with aligning holes?
• Time is relative. I can understand this on a basic level, but how can time be faster in the past?
• How fatal would a natural nuclear reactor like that at Oklo be to nearby life?
• Why do transformers need a magnetic core when you can just put a coil in another coil?
• Tree rings are often used to estimate historical atmospheric temperatures. However, numerous other variables (rainfall/snowpack, herbivory, volcanic activity, fires, etc) also affect the growth rates of trees, so why do we place so much trust in tree rings to measure past temperatures?
• Is it possible to gain more weight than the physical weight of the food you are eating?

Why do cognitive abilities progressively go down the more tired you are, sometimes to the point of having your mind go "blank"? Posted: 15 Apr 2018 09:43 PM PDT submitted by /u/penatbater [link] [comments]

Why can't I receive information from the future via delayed choice quantum eraser with a different beam splitter? Posted: 15 Apr 2018 09:58 PM PDT It seems that you cannot send information to the past (aka receive information from the future) with delayed choice because the waveform interference pattern cannot be understood with the screen alone because you need to first examine the detectors to make sense of the dots on the screen. The current thinking seems to be that you cannot send information across time because in the scrambling "eraser" section of the experiment, we send photons through a beam splitter which results in 50% landing in detectors C and the other 50% in detector D. Due to the fact their interference patterns subsequently are perfectly out of phase, you cannot decipher waveforms with the screen alone because without being able to reference the information in the detectors, the screen alone just looks like a bunch of unorganized dots with no apparent interference pattern. However, is there a beam splitter available to science which could send most of the photons to one of the two detectors (for example, 99% go to detector C once they are in the eraser portion of the experiment). It would seem to me that if there's a beam splitter than can send most of the photons just to detector C (99% instead of 50%), you would pretty clearly be able to see either a waveform or not, despite a little bit of fuzziness. This idea also seems like it would not violate nature's rules about not having certainty about path information to get the waveform interference pattern. References: https://www.youtube.com/watch?v=8ORLN_KwAgs https://youtu.be/MuvwcsfXIIo?t=4m https://youtu.be/VYZQxMowBsw?t=3m18s submitted by /u/printThisAndSmokeIt [link] [comments]

What determines which X chromosome becomes active during the X inactivation process? Posted: 15 Apr 2018 09:32 PM PDT Shortly after the conception of a female mammal, one of the X chromosomes is inactivated. I'm curious as to what determines which of the two X chromosomes becomes the active one in a given cell? edit: clarifying question. submitted by /u/Moonpenny [link] [comments]

In the winter underneath frozen streams and rivers, what microbial colonies live there and thrive there? Posted: 15 Apr 2018 09:30 PM PDT I'm just wondering since I'm sending a cryolander down to a frozen river next year and I'm wondering if anything lives and thrives there other than fish. Thanks. submitted by /u/zyzzyne_ [link] [comments]

What is the scientific/biological reason for wanting to squeeze anything we deem cute? Posted: 15 Apr 2018 08:57 PM PDT It doesn't matter what it is. When it's cute we must touch it and preferably squeeze it. Why?? submitted by /u/RedRaiderRx09 [link] [comments]

Are eyes like telescopes? The bigger they are the more light they can detect? If so how big would they have to be in order to see nebulae unassisted? Posted: 16 Apr 2018 04:58 AM PDT submitted by /u/Oldamog [link] [comments]

How is caffeine removed from coffee? Posted: 15 Apr 2018 03:53 PM PDT I'm wondering how the process works by removing caffeine from coffee to make decaffeinated coffee submitted by /u/LucidDreamState [link] [comments]

What makes our sunsets so beautiful and vibrant on some evenings, and others not so vibrant? Posted: 16 Apr 2018 02:00 AM PDT submitted by /u/niuniu1218 [link] [comments]

Is it possible to create a molecule containing a noble gas ? Posted: 16 Apr 2018 05:31 AM PDT For example, would it be possible to take away an electron from a Helium atom and then force it to link with a Hydrogen atom ? submitted by /u/composedEdius [link] [comments]

In reactions (chemical or nuclear) where light is a product, is there an acceleration phase that photons undergo or do they simply exist at C? Posted: 16 Apr 2018 07:46 AM PDT In combustion reaction or nuclear reactions light is a product of the reaction. Is there a point where photons have to be accelerated to the speed of light or do photons only exist at C? submitted by /u/GuitarCFD [link] [comments]

Structurally, how can you tell the difference between the aorta and superior vena cava? Posted: 16 Apr 2018 02:20 AM PDT I am currently studying the structure of the heart in biology and, after dissecting a heart am unsure of how you can tell what is the aorta and what is the superior vena cava. I have put a link with images of the heart I dissected if it helps. https://imgur.com/a/sRcxs submitted by /u/maxthekillbot [link] [comments]

A creationist told me that science, under uniformitarianism, basically assumes that things have always occured as they do now. Is this true? If it's true isn't that a problem? Posted: 15 Apr 2018 08:48 PM PDT submitted by /u/BookerDouglas [link] [comments]

Can dogs have recessive genes show up in later generations? Posted: 15 Apr 2018 08:02 PM PDT submitted by /u/Genesiesha [link] [comments]

Does driving a nail into a tree actually "hurt" it? Posted: 15 Apr 2018 04:02 PM PDT Assuming for the sake of argument that it's a rustproof nail (so that infection isn't a factor), does that nail actually harm the tree in any way? Or is the idea that it hurts the tree simply me projecting? submitted by /u/VagabondVivant [link] [comments]

Has a gravitational force been observed between massless particles? Posted: 15 Apr 2018 03:04 PM PDT Light is attracted to mass by gravity (black holes, gravitational lensing). Due to Newton's 3rd law (For every action, there is an equal and opposite reaction) the light will assert a force on the mass via gravity. Extending this, is a gravitational force between photons? And is it large enough to be observed? I understand at high energies, pair production will be a factor, but I was thinking about lower energies than this. Additional question: If you shine two lasers of wavelength X metres in parallel, Y metres apart, how long will it before the beams converge due to gravity. I'm not sure about my logic here. Please correct me if I'm wrong. submitted by /u/12ShotsThenHome [link] [comments]

Has there ever been a documented instance where a planet in a binary star system orbits in a figure 8 motion around both stars? Posted: 15 Apr 2018 08:52 PM PDT submitted by /u/its_always_foreign [link] [comments]

How does magnetic field density behave when there is more than one wire generating current? Is it cumulative, or is it more complicated than that? Posted: 15 Apr 2018 05:36 PM PDT I'm doing some research on ELF magnetic fields generated by electrical wires and appliances. All of the diagrams I've seen of magnetic field strength in relation to distance from the source show just one point source. What happens if there's more than one? For example, in parallel high voltage power lines? Would the density in Tesla or Gauss simply be a matter of calculating the intensity relative to each point and adding or is there more that I have to take into account? submitted by /u/Slid61 [link] [comments]

Would it be possible to build telescope using long pipes or multiple sheets with aligning holes? Posted: 16 Apr 2018 06:31 AM PDT Would it be possible to get an image if one constrained the light to a direction with long pipes in a matrix that only let light through if it is coming from given direction? It could also be made of sheets that basically do what the pipes are meant to do but with longer and longer intervals of space between, and some absorption area around the holes. submitted by /u/jarmoj [link] [comments]

Time is relative. I can understand this on a basic level, but how can time be faster in the past? Posted: 15 Apr 2018 09:28 PM PDT I was reading a list of facts about time and this concept confuses me. I can't seem to wrap my brain around it. Can anyone explain? "It appears that distant galaxies are moving faster than nearby ones, which suggests that the universe is accelerating as it expands. One physicist has suggested that the reason distant galaxies appear to move faster is because in the past, time was faster. If he's correct, this means that in a few billion years, time will be frozen." https://www.factinate.com/things/43-fast-facts-time/ submitted by /u/cinymin [link] [comments]

How fatal would a natural nuclear reactor like that at Oklo be to nearby life? Posted: 15 Apr 2018 08:26 PM PDT How much radiation would such a reactor produce? How fatal would this be to nearby life? Either due to radiation or heat production. How large might the irradiated area be? How much larger or smaller could such a reactor feasibly be? submitted by /u/Admortis [link] [comments]

Why do transformers need a magnetic core when you can just put a coil in another coil? Posted: 15 Apr 2018 08:22 PM PDT So, if I'm not mistaken, a transformer works by guiding the magnetic field from one coil into the center of another coil, thus generating a current. If that's the case, isn't it easier to just put a coil inside another coil, and not only it would be easier to make but it would also allow you to avoid eddy current losses? Thanks in advance submitted by /u/qwerty-_-123 [link] [comments]

Tree rings are often used to estimate historical atmospheric temperatures. However, numerous other variables (rainfall/snowpack, herbivory, volcanic activity, fires, etc) also affect the growth rates of trees, so why do we place so much trust in tree rings to measure past temperatures? Posted: 15 Apr 2018 02:31 PM PDT For example, say a tree was in its optimal temperature condition for two consecutive years in the distant past. Also imagine that the same tree was in sub-optimal rainfall conditions in the first of those two years, but in optimal rainfall conditions in the second year. This change in conditions would cause the tree to grow faster in the second year than in the first. From what I understand (which may be wrong), scientists today would see that tree's rings and, in the absence of other evidence, surmise that the temperature was higher in the first year than in the second simply because of the difference in size between those consecutive rings. Obviously, this would be false, because the temperature was the same in both years. submitted by /u/Wonderful_Toes [link] [comments]

Is it possible to gain more weight than the physical weight of the food you are eating? Posted: 16 Apr 2018 05:49 AM PDT submitted by /u/badRLplayer [link] [comments]

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