Is it possible for a planet to have a perpetual solar eclipse if a satellite orbits at the same speed as the planets rotation? |
- Is it possible for a planet to have a perpetual solar eclipse if a satellite orbits at the same speed as the planets rotation?
- What is happening internally to make weight loss so beneficial? How does losing weight when obese improve health & obesity-related conditions like insulin resistance etc.?
- AskScience AMA Series: We are hydrogen and fuel cell experts at Pacific Northwest National Laboratory, here to talk about using catalytic science to convert dispersed carbon into chemicals and energy-dense liquid fuels. AUA!
- Why is the ITER Tokomak project taking so long to produce results? (Wiki: "Initial plasma experiments are scheduled to begin in 2025, with full deuterium–tritium fusion experiments starting in 2035.")
- Why does Uranus look more uniform and less streaky than Neptune when they have similar atmospheric compositions?
- How does the brains of conjoined twins process sensation?
- Why are spin-up nucleons considered to be lower energy states as opposed to spin-down that are higher energy?
- How is truly elastic scattering of a photon from an electron possible?
- We’ve hybridized things like ligers. If ethics weren’t an issue, what could humans themselves hybridize with, if anything?
- Does thermal expansion contribute to rising sea levels?
- Do rain drop bursts mid air in certain conditions? What is it called?
- Why did the Chernobyl plant have to be encased?
- Do we experience significant time dilation because of how fast we are moving relative to a still point in space?
- When it's said the amplitude of a spherical wave decreases at 1/d², shouldn't it be 1/(1+d²) to avoid absurd results at 0:1m?
- Has climate change made weather forecasting more difficult?
- Why do hurricanes turn north as they approach North America?
- Why are humans and animals not fertile all the time?
- Do deaf people with dyslexia have a hard time understanding sign language?
- Can animal remains fossilize on the ocean floor?
- Why is vitamin A specifically prescribed for patients with measles?
| Posted: 07 Oct 2018 10:53 PM PDT |
| Posted: 07 Oct 2018 07:56 AM PDT This feels like it should be like, obvious. But for some reason...I don't REALLY know what happens to a body that loses excess fat. How does weight loss improve health? Reducing stress on joints makes intuitive sense. But how does weight loss improve insulin sensitivity? How does it improve cholesterol? How does it improve blood pressure? Is it losing fat that does that, or simply eating less? Etc. Hope this question makes sense. I'm on a journey to lose 100lbs and wondering what's happening inside o me to make me healthier (I hope!) [link] [comments]  |
| Posted: 08 Oct 2018 06:50 AM PDT Hi Reddit! Did you know that October 8 is National Hydrogen and Fuel Cell Day? It's definitely a day worth celebrating - after all, hydrogen and fuel cells are the perfect partners for clean, fuel-efficient transportation and a secure energy future. Here at Pacific Northwest National Laboratory, we've pushed the frontiers of hydrogen and fuel cell research. In the area of electrocatalysis, we've developed a new molybdenum phosphide-based non-platinum group metal catalyst that has 5 times greater performance over similar current catalysts and improved results over platinum catalysts for microbial electrolysis. We've also invented a new design for magnetocaloric hydrogen liquefaction that integrates flow values to enable startup from room temperature as well as optimized operation. And our Chemical Transformations Initiative is allowing us to transform wastes into useful products like aviation fuels, while generating hydrogen gas at the same time. We'll be on at 12:30 PT (3:30 ET, 20:30 UT), ask us anything! [link] [comments]  |
| Posted: 08 Oct 2018 12:13 AM PDT |
| Posted: 07 Oct 2018 10:17 PM PDT Uranus looks way more uniform than Neptune, and it's also a lighter shade of blue. If they have very similar atmospheric compositions, mustn't their appearances be nearly the same? [link] [comments]  |
| How does the brains of conjoined twins process sensation? Posted: 07 Oct 2018 02:37 PM PDT Like if they touch a hot surface does that immediate response to move away get sent to both brains or just one? [link] [comments]  |
| Posted: 08 Oct 2018 12:12 AM PDT Studying MRIs right now, and there's a bit of theory that I'm yet to understand about resonance when you subject precessing nuclei to pulses of radio waves. From what I managed to grasp: When the right frequency (of what?) is given (equivalent to the Larmor frequency of the particular nucleus), the nucleus can be made to flip from a lower energy state (spin-up = parallel to the external magnetic field direction) to a higher energy state (spin-down = antiparallel to the ext mg direction). They rotate in phase with the pulse, and thus, with each other. Learning medical physics has been a struggle (what I get for not doing jack crap for the most part of school - missed on learning all the basics), but this sub has been A LIFESAVER (it's subscribers, actually). I cannot thank you all educated people enough!! [link] [comments]  |
| How is truly elastic scattering of a photon from an electron possible? Posted: 08 Oct 2018 07:48 AM PDT Let's assume that a photon interacts with an electron and is elastically scattered. The photon is deflected by the electron and it's original direction of motion is changed but it maintains the same energy, i.e. wavelength. The deflection of the photon results in momentum exchange whereby after the collision the photon has a new momentum (from the altered direction) and likewise the electron must "recoil" in order to conserve momentum. This is what is perplexing - it would seem that after scattering if the original photon is at its exact same original energy/wavelength then this would imply that the electron could not have any energy "given" to it by the photon. BUT if the photon has a new momentum then the electron MUST have had its momentum and kinetic energy changed (absorbing or giving energy from/to the photon) to account for conservation of momentum? How can these two opposing ideas be reconciled? Essentially, the question boils down to how can a photon have the same original energy but changed momentum after scattering? Is elastic scattering truly elastic or are there slight decreases/increases in wavelength of light after the scattering incident? [link] [comments]  |
| Posted: 07 Oct 2018 02:32 PM PDT |
| Does thermal expansion contribute to rising sea levels? Posted: 07 Oct 2018 12:04 PM PDT In my English student's book (On Screen B2+, pg. 38-39), the authors state that the main contribution to rising sea levels is thermal expansion, and while that does make sense, I have never heard this theory, and feel like its not significant enough compared to melting ice, so does thermal expansion contribute a lot to rising sea levels? [link] [comments]  |
| Do rain drop bursts mid air in certain conditions? What is it called? Posted: 07 Oct 2018 02:41 PM PDT About two years ago in a light rain on top of a building, I saw many drops coming towards my face and burst into few small drops mid air. It was mesmerizing, because their direction was right towards me and they were light and not so fast, I was able to track them with eyes and watched them split mid air. I can explain in more detail if needed. It continued for 5-7 minutes and then air changed its path and slowed down and the scene ended. What is this phenomenon called? Are there any videos or pictures of it? I could not find it on Internet. [link] [comments]  |
| Why did the Chernobyl plant have to be encased? Posted: 07 Oct 2018 01:32 PM PDT I've been reading about the second Sarcophagus and the amount of planning and funding that went into it. Why was the first "tomb" only slated to last 20 years? Can the radiation actually eat through the concrete/other materials that were covering the exposed core? [link] [comments]  |
| Posted: 07 Oct 2018 10:58 PM PDT Because we are so small, we're moved around by a lot of things. As humans we rotate on earth, earth is revolving around the sun. The sun is revolving around our galaxy, and our galaxy is moving away from other galaxies. So my question is, if we were to compare our relative time to a completely still point. Would there be a significant difference? And if so, about how big would it be? [link] [comments]  |
| Posted: 07 Oct 2018 11:33 PM PDT |
| Has climate change made weather forecasting more difficult? Posted: 07 Oct 2018 07:52 AM PDT In my Environmental Science class, we've been talking about the carbon cycle a lot. Because I learned that CO2 specifically contributes to climate change, I was wondering if due to the rapidly rising CO2 levels and a rising average global temperature, if that has made weather forecasting more difficult. [link] [comments]  |
| Why do hurricanes turn north as they approach North America? Posted: 07 Oct 2018 12:14 PM PDT Perhaps this is just a false perception I have, but it seems that hurricanes tend to turn north as they approach North and Central America. I doubt that is a matter of ocean currents, though I know they turn north as well. But look at Tropical Storm Michael now. It is currently near the Yucatan, but it is projected to shoot north and then to the northeast. Why does this happen? [link] [comments]  |
| Why are humans and animals not fertile all the time? Posted: 07 Oct 2018 03:32 PM PDT I'm fairly well informed on the human menstrual cycle, so I'm not looking for an explanation of that. I learned that female pandas are only fertile 36 hours per year. It seems unlikely that it costs the body a lot of resources to produce an ovum. The only reason I can imagine is just to regulate a species' population growth. [link] [comments]  |
| Do deaf people with dyslexia have a hard time understanding sign language? Posted: 07 Oct 2018 03:14 PM PDT Sign language involves interpreting language using visual interpretation, so would dyslexia make that difficult? Or does sign language go through a different path in the brain? PS not sure which flair is most suitable - sorry if it's a bad choice! [link] [comments]  |
| Can animal remains fossilize on the ocean floor? Posted: 07 Oct 2018 12:41 PM PDT |
| Why is vitamin A specifically prescribed for patients with measles? Posted: 07 Oct 2018 06:32 AM PDT |
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