What maintains the amount of blood in your body? |
- What maintains the amount of blood in your body?
- What happens when you project an electron(like in projectile motion)? Does it behave as a particle or wave?
- Does the magnetic field energy around a magnetar type neutron star have mass?
- Are earthquakes only dangerous to people in/around buildings? If im outside and an earthquake happened do I just not care? Am I in any danger?
- Why do some plastics get stronger when stretched?
- Do different tire threads actually increase traction/range/fuel efficiency etc. or is it mainly a marketing trick?
- Do astronauts percieve the passage of time differently in space from the ISS? (ex. Are the days seeminly longer, shorter, or about the same?)
- How does the many worlds interpretation explain quantum entanglement?
- Is it possible, or is it not possible, to see stars when in outer space?
- How does gravitational confinement fusion work?
- Does The First Step of the Proton Proton Fusion Chain Release Energy?
- If I braced myself against the side of the ISS opposite its motion, and pushed off as hard as I could, would I lower my velocity enough to fall down to Earth?
- What is the minimum population count for a species to have enough genetic diversity for them to continue existing?
- How do calculators work things out using pi? How do they incorporate an infinite number into an equation, surely it would get stuck infinitely calculating it?
- When physicists say that the fabric of spacetime will be torn apart if the Big Rip model is true, what does that mean?
- Why do people think that in quantum physics a particle is in a superposition of multiple states?
- Why do cats shake their butts before pouncing on something?
- Why do you have to remove the testicle when having testicular cancer?
- What is the purpose of the inflammation response in humans?
- Can a black hole support a solar system?
- What's the difference between rod-shaped and bacilli-shaped bacteria?
- Why does human perception seem to follow a logarithmic scale?
| What maintains the amount of blood in your body? Posted: 31 Dec 2018 05:18 AM PST If you donate blood your body loses that amount but your body also can replace it, but what keeps your body from continuing making blood? If the human body can only maintain a certain amount of blood. [link] [comments]  |
| Posted: 31 Dec 2018 05:13 AM PST |
| Does the magnetic field energy around a magnetar type neutron star have mass? Posted: 31 Dec 2018 06:18 AM PST From wikipedia: A magnetar's 1010 tesla field, by contrast, has an energy density of 4.0×1025 J/m3, with an E/c2 mass density more than 10,000 times that of lead. If I'm understanding this, it's saying that the energy stored in any given cubic meter of magentic field around a magnetar is 10,000 times the energy of 1 cubic meter of lead converted to energy in accordance with E =mc2 First off, this completely blows my mind. I didnt realise anything could store energy at a higher density than matter besides maybe a black hole. Second, does this magnetic field energy have mass? Does this mass make the neutron star more massive? Like, from outside the strong field, looking in, is the total mass in a sphere around the neutron star and its magnetic field higher than the mass inside a sphere around only the actual neutron star? Could this energy be released quickly? [link] [comments]  |
| Posted: 30 Dec 2018 10:21 PM PST |
| Why do some plastics get stronger when stretched? Posted: 30 Dec 2018 02:29 PM PST I was trying to tear a plastic bag from the grocery store apart when I thought about this. I was trying to rip the "handles" off, but it just stretches to the limit of my strength, extends but doesn't tear. Why is that? I know I could tear it apart easily by applying force from another angle and whatnot, but I'm curious to why it's strengthened by the pulling. [link] [comments]  |
| Posted: 30 Dec 2018 02:46 PM PST We just got winter tires and I was just curious as to if they, along with "performance" and "off road" tires, really make a difference and if so how much? [link] [comments]  |
| Posted: 30 Dec 2018 07:42 PM PST |
| How does the many worlds interpretation explain quantum entanglement? Posted: 30 Dec 2018 08:45 PM PST It is said that the many worlds interpretation mantains both determinism and locality. If so, how does it explain quantum entanglement? How is this interpretation able to explain quantum entanglement and mantain locality at the same time? [link] [comments]  |
| Is it possible, or is it not possible, to see stars when in outer space? Posted: 31 Dec 2018 02:56 AM PST I'm curious, because I can't seem to find a conclusive answer. The old astronauts all claim space is completely black, while the more recent astronauts claim it's full of stars. I can find no video footage of stars in space, and yet Hubble keeps spewing out star-filled images. Does the atmosphere do something that lets us see starlight, which doesn't happen when you're in outer space? Did NASA change the windows on spacecrafts/ISS to allow astronauts to perceive starlight as opposed to older astronauts who couldn't? Is Hubble magic? What's going on? [link] [comments]  |
| How does gravitational confinement fusion work? Posted: 30 Dec 2018 07:19 PM PST So stars utilize quantum tunneling for fusion and gravity to hold themselves together. Physicists mention that gravitational confinement can satisfy the Lawson criterion (conditions needed for fusion). So how do they know this? And how do you figure it out? Like if you had one cubic meter of deuterium tritium that had a mass of 0.5 grams, how do you figure out how much mass is needed to reach 40 million Kelvin?(ignition temperature) [link] [comments]  |
| Does The First Step of the Proton Proton Fusion Chain Release Energy? Posted: 30 Dec 2018 05:56 PM PST The first step in the Proton Proton Chain involves two hydrogen atoms fusing briefly into a diproton (helium-2) but my understanding is that (far) more than 99% of the time, this helium-2 decays back into a pair of hydrogen nuclei, and only very rarely into the deuterium needed for the next step in the Proton Proton reaction. My question is: does this part of the chain release energy? I assume that it must, but if it does, wouldn't that mean that the majority of the sun's energy is from proton proton fusion that doesn't result in deuterium (and eventually helium-4?) And, if 99%+ of the time diprotons just decay back into two hydrogen nuclei, do they 'gain back' the mass lost during fusion, or did they not lose any in the first place (and so, did they actually release any energy?) Thanks for any clarity that can be provided! [link] [comments]  |
| Posted: 30 Dec 2018 03:06 PM PST |
| Posted: 30 Dec 2018 09:11 AM PST I read about the extinction of a white rhino and I read somewhere that even if the male were to survive, there would be lack of genetic diversity for the species to continue to thrive? [link] [comments]  |
| Posted: 30 Dec 2018 04:47 PM PST |
| Posted: 30 Dec 2018 08:04 AM PST Could someone elucidate the idea of spacetime getting ripped apart by accelerating expansion? What would be the physical description of this scenario? Does this mean that time itself would cease to exist? I know that there are certain fields inherent to space, such as quantum and Higgs. What would cause these fields to be destroyed instead of just stretched out? [link] [comments]  |
| Why do people think that in quantum physics a particle is in a superposition of multiple states? Posted: 30 Dec 2018 06:54 PM PST Where does this "superposition" come from? What's the rationale for thinking that an electron is spinning both clockwise and counter-clockwise at the same time when it's not entangled with an observer? I think what's really counter-intuitive about quantum mechanics is this idea of superposition, not so much as what kind of interpretation is correct for the decoherence, Copenhagen or many worlds. [link] [comments]  |
| Why do cats shake their butts before pouncing on something? Posted: 30 Dec 2018 05:15 AM PST |
| Why do you have to remove the testicle when having testicular cancer? Posted: 30 Dec 2018 09:06 AM PST Can they use radiation or the other kinds of treatment? Or do they fuck up the testicle anyways? [link] [comments]  |
| What is the purpose of the inflammation response in humans? Posted: 30 Dec 2018 08:07 AM PST From regular NSAIDs to steroids, there seem to be a lot of medicines dedicated to lessening the inflammation response or halting it altogether. Does the inflammation response ever have a useful physiological purpose? [link] [comments]  |
| Can a black hole support a solar system? Posted: 30 Dec 2018 04:55 AM PST Lets assume that the black hole had the same mass as our sun, and was "somehow" suddenly swapped in place of our sun. Given the same mass, would the gravity, and thus the stability of the solar system remain the same? And as a fun aside, would it be at all possible for this new solar system to support any type of life? [link] [comments]  |
| What's the difference between rod-shaped and bacilli-shaped bacteria? Posted: 30 Dec 2018 09:05 AM PST I often see the terms bacilli and rod-shaped used interchangebly or one is preferred over the other - but why? Are they really the same? Or is "rod-shaped" used more often to distinguish between Bacillus? Or am I just being stupid? [link] [comments]  |
| Why does human perception seem to follow a logarithmic scale? Posted: 30 Dec 2018 07:57 AM PST |
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