| Are all liquids incompressible and all gasses compressable? Posted: 18 Dec 2018 06:40 AM PST I've always heard about water specifically being incompressible, eg water hammer. Are all liquids incompressible or is there something specific about water? Are there any compressible liquids? Or is it that liquid is an state of matter that is incompressible and if it is compressible then it's a gas? I could imagine there is a point that you can't compress a gas any further, does that correspond with a phase change to liquid? submitted by /u/netcraft [link] [comments] |
| AskScience AMA Series: I am Andrew Dauber, Chief of Endocrinology at Children's National and a genetics researcher. AMA! Posted: 18 Dec 2018 07:54 AM PST I am the Chief of Endocrinology at Children's National Health System where I specialize in studying and treating growth and height disorders. I have found a number of new genetic causes of short stature as well as two genes that lead to precocious puberty. Through clinical research and pediatric partnerships/growth consortiums, we aim to solve previously undiagnosed height disorders and provide treatment for children with short stature. We are figuring out new approaches to diagnosing and treating growth disorders. One project we're working on with the NIH is using the power of electronic health records and intersecting them with genomic studies, such as whole-exome sequencing, to identify and treat high-risk patients early on and throughout their life. These partnerships serve as engines of innovation since they accelerate research, enhance medical education and improve, or at least inform, pediatric health outcomes. I have spent the last 18 years learning about pediatrics, endocrinology, genomics, and clinical research having earned my MD and Masters in Clinical Research from Harvard Medical School. I've published close to 70 studies about genetic causes of growth disorders and early puberty. I am happy to talk about anything related to genomics, pediatric endocrinology, growth, puberty, working in a Children's hospital-or about science and medicine. I'll be on at 1 PM (ET, 18 UT), ask me anything! submitted by /u/AskScienceModerator [link] [comments] |
| How fast can a submarine surface? Posted: 17 Dec 2018 07:10 AM PST So I need some help to end an argument. A friend and I were arguing over something in Aquaman. In the movie, he pushes a submarine out of the water at superspeed. One of us argues that the sudden change in pressure would destroy the submarine the other says different. Who is right and why? Thanks submitted by /u/edgar_sbj [link] [comments] |
| Do people who undergo hemispherectomies go blind in one eye? Posted: 18 Dec 2018 08:47 AM PST If someone were to have half of their brain removed as a last resort for treatment of seizures, or whatever other reason, would they lose vision in the corresponding eye (i.e., remove left hemisphere, lose right vision)? submitted by /u/Cheesewithmold [link] [comments] |
| What part/side of the cats brain controls its tail? Posted: 18 Dec 2018 08:12 AM PST Can't find much on my internet search... It's the only appendage thats in the center of the body, so I was wondering is it controlled by one side of the brain or both simultaneously? submitted by /u/tex1031 [link] [comments] |
| Can a dwarf planet become a moon? Posted: 17 Dec 2018 07:55 PM PST I was noticing that Eris's orbit bring it close to Neptune's orbit. If the timing lined up would Eris be close enough to become a moon of Neptune? Are there any other dwarf planets that scientists think may become a moon? Lastly are there any know current moons that are theorized to come from the Kuiper belt? submitted by /u/adaulthumantreehouse [link] [comments] |
| Weapons-grade Lasers- Who is responsible for keeping them out of the hands of the public? Posted: 18 Dec 2018 04:11 AM PST Back in 1986, my Physics (high school) teacher demonstrated a Laser in class, and a few of the more devoted students were invited to experiment with it. I, being a teenage boy, wanted to get my hands on a Star Trek-style weapon. My teach said "the government" was keeping the really powerful Lasers out of reach of the public. I couldn't argue with that logic. 32 years of globalism later, and with mini-lasers available at convenience stores, I still wonder how "the government" keeps deadly Lasers out of reach of the "bad guys". submitted by /u/TransposingJons [link] [comments] |
| Is there any way to predict the chemical reactions that hypothetical 'island of stability' transuranic elements would be involved in? Posted: 18 Dec 2018 05:07 AM PST I've just recently learned about the hypothetical island of stability beyond the elements we currently can produce in our largest colliders. This has made me curious as to what properties those elements could have, or even if there is a system to predict them. I know that heavier elements in a group often react much more vigorously and in a similar manner to their lighter siblings (sodium and potassium for example), and am wondering if any of the groups we understand extend into this 'Island of Stability'. Additionally: I know Feynman hypothetically capped the maximum number of elements at around 170ish (as any larger would force electrons to travel faster than light), and I'm wondering if our modern-day understanding of the electron has progressed enough since Feynman's day to shed more light on this. To be honest, any discussion about hypothetical stable transuranic elements would be wonderful. Thank you for your time. submitted by /u/Grumpy_Kong [link] [comments] |
| Did dinosaurs live in all areas of the world? Why is it that we have found so few fossils? Posted: 17 Dec 2018 06:13 PM PST I live on the east coast of the U.S. I've always been curious about dinosaurs and where they were most heavily concentrated. Did they exist in areas such as the east coast of the United States? Where were they most heavily concentrated? submitted by /u/jaj-io [link] [comments] |
| During the refractory period of a neuron, do the ion pumps create a small electric charge or current which could influence other neurons without triggering their activation potential? Posted: 18 Dec 2018 06:48 AM PST My understanding is that following a neuron firing, we get the relative and absolute refractory periods. During this time the ion pumps are busy restoring the ion ratios to be ready again. During repolarisation, does the neuron experience a current as it charges up to the resting potential, and if so, could this affect the activity of ions surrounding other neurons or induce small charges in neurons themselves? submitted by /u/ThrowawayBrisvegas [link] [comments] |
| How does altitude of detonation of a nuclear bomb affect the “fallout area?” Posted: 17 Dec 2018 10:36 PM PST When a nuclear bomb is detonated, the surrounding air is almost instantly heated and rises rapidly. Various debris, gasses, and radioactive material are brought up with this air, and a repeated heating and cooling process occurs that forms the infamous mushroom cloud. The cloud, however, will reach a maximum height when the pressure at the top of the cloud is equal to the atmospheric pressure at that height. The cloud will then move in a generally lateral direction. If a nuclear weapon is detonated at a higher altitude than anticipated, say, in the accidental premature detonation of a warhead, how would the area the nuclear fallout covers be affected? Would the cloud move laterally for a longer distance? If so, how would the radiation levels on the ground be affected? Sorry for my insufficient vernacular; I'm just a high school student who likes to read Wikipedia. submitted by /u/BananaScience [link] [comments] |
| Did leaded gasoline really contribute to behavioral problems and crime among youth? Posted: 17 Dec 2018 04:38 PM PST I'm very interested in how leaded gas could have influenced crime in the US. A query about crime in NYC in the 70's and 80's focused a lot on leaded petrol back then affecting youth and crime. Please explain submitted by /u/MudButt2001 [link] [comments] |
| Why do our brains see yellow when our red and green cones are triggered as opposed to a red-green mix like we do with red blue and purple? Posted: 17 Dec 2018 02:56 PM PST |
| What's the life cycle of Sargassum seaweed? Posted: 17 Dec 2018 05:40 PM PST |
| How is medicine able to target specific parts of the body? As in, how does cold medicine reduce nasal congestion? (X-posted from r/askreddit) Posted: 17 Dec 2018 03:33 PM PST |
| How exactly do different isotopes of an element change its chemical properties? Posted: 17 Dec 2018 12:45 PM PST For example, is the only difference between 12C and 13C a change in mass because of the extra neutron, or are there any other small changes? I'm not exactly well-versed in chemistry, and couldn't find any answers on google. Thanks in advance! submitted by /u/beans0503 [link] [comments] |
| Does the presence of neutrons affect the charge-charge interaction and orbit of electrons? Posted: 17 Dec 2018 12:17 PM PST I'm familiar with the electron cloud and MOT, Schrodinger's equation, quantum tunneling, and how those apply to how electrons move around the nucleus, but only minimally. I'm not shy to say I passed that class by the skin of my feckin' teeth. I also know there aren't any true electromagnetic insulators, so I don't suppose a neutron behaves in that manner. My question came from imagining a Deuterium atom with the proton and neutron clumped together creating a lopsided? nucleus. One thing we didn't really go over in that class was anything of a more in-depth look at the composition of the nucleus so what I'm wondering is a few things: How is a Deuterium nucleus shaped? Is it kind of peanut shaped with both particles relatively close together? Are they smushed together to some degree? Does the nucleus exist similarly to the electron in some de Broglie state? As best I can remember the driver for the electron-nucleus relationship is the charge-charge interaction between the electron and the centralized point of positive charge. Does the presence of a neutron have any known affect, or is it just inert matter? submitted by /u/FiggyDiggz [link] [comments] |
| Why is the speed of light such an odd number? Posted: 17 Dec 2018 10:25 AM PST This is admittedly more a question of the origin of the metric system than anything else, but for lack of a weights/measures tag, I marked it as physics. The definition of the meter is based on the speed of light. Light travles exactly 299,792,458 meters per second. Why? If the meter is based on the speed of light, why that number. Why not 300,000,000? Or 1,000,000,000 (1 light second = 1 gigameter)? The latter, I can understand that it would make the meter significantly shorter (much closer to the US foot), but why not the 300 million? submitted by /u/Artisan219 [link] [comments] |
| Why does classical pathway deficiency can causes SLE ? Posted: 17 Dec 2018 03:01 PM PST So I read in Basic immunology by Abul K. Abbas that deficiencies in early complement proteins (C1, C4, C2) could cause SLE, because the classical pathway removes immune complexes, but then it says that the process of immune complexes clearance is mediated by C3b and CR1 on erythrocytes, so how come the classical pathway C1, C4, and C2 are involved in clearance of immune complexes ? submitted by /u/Reality-Labs [link] [comments] |
| Why do different cancer types require different treatments? Posted: 17 Dec 2018 08:32 PM PST |
| Are all atomic nuclei of one isotope of an element identical? Posted: 17 Dec 2018 10:40 AM PST They are the same in terms of number of protons and number of neutrons, but is their arrangement identical in every atom. If there are differences, would this affect their physical/chemical properties at all? submitted by /u/deflatedfruit [link] [comments] |
| Hoe are rocket fuel ratios balanced? Posted: 17 Dec 2018 01:17 PM PST Are fuel mixtures for rockets usually mixed lean, rich, or perfectly balanced? Or does it change as the launch progresses? While watching videos of the VSS unity, the exhaust right after release appears dark and unbalanced in fuel:oxidizer ratio submitted by /u/moonlightBlitz [link] [comments] |
