Is my stomach ever completely empty? And about how much fluid is in there without and food or drink?

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• Is my stomach ever completely empty? And about how much fluid is in there without and food or drink?
• Why is osmium (slightly) blue?
• What is really going on when I "sleep wrong" and wake up with a stiff neck?
• Are there "quantum calculations" that can make a quantum system take as long as an average supercomputer to solve?
• How is it possible that the strong coupling constant is greater than 1?
• What is the difference between kinetic energy and momentum?
• If light is a transverse wave, shouldn't all observers agree on the direction a travel for a photon?
• Is it a coincidence that the great majority of tectonic plate boundaries are in the ocean?
• When nucleons join together to form a nucleus the total mass is greater than their individual masses (the mass defect). How is the additional mass distributed between each of the nucleons?
• How entangled particles(electrons/photons) are created? And does any natural process is cosmos yield entangled particles?
• How does proton-antiproton annihilation work?
• Why can't we (or don't we) connect prosthetics to the nerves of the limb it attaches to?
• Is there a point in history that humans (or our genetic ancestors) became carnivorous?
• Are there any remnants of planets in our solar system that existed before our sun?
• What is the point of the Bonferroni adjustment?
• [Astronomy] If You Were In the Middle of the Boötes Void, Would You Be Able to See Yourself/Anything or Tell If You Were Moving?
• What is most different about the English language today compared to English of George Washington's time, such as that in the Constitution and/or Declaration of Independence?
• How do soundwaves react to temperature?
• How do HEAT (High Explosive Anti-Tank) rounds know when they are approaching the target?

Is my stomach ever completely empty? And about how much fluid is in there without and food or drink? Posted: 21 Apr 2017 05:55 PM PDT I'm curious as to what the neutral stomach fullness is. Like if I don't eat or drink for about 4 hours, what is in my stomach? I'm assuming it's some kind of acid but what's the amount that would be in there? Thanks. submitted by /u/sleepless_mc [link] [comments]

Why is osmium (slightly) blue? Posted: 21 Apr 2017 05:45 PM PDT Certain scientific papers state that osmium is a blue-coloured metal. I understand that gold and copper is distinctively coloured due to relativity (Although I am a bit hazy with copper because its nucleus is much lighter). But why is osmium blue? It is not prominently blue so I am quite certain it is not about relativity, but what could it be? submitted by /u/Aethemeron [link] [comments]

What is really going on when I "sleep wrong" and wake up with a stiff neck? Posted: 21 Apr 2017 11:52 AM PDT submitted by /u/TheGreenShepherd [link] [comments]

Are there "quantum calculations" that can make a quantum system take as long as an average supercomputer to solve? Posted: 21 Apr 2017 08:33 PM PDT Also, will quantum computers make cryptocurrency obsolete? Is it possible the government already has quantum computers but hasn't revealed them to keep the advantage? submitted by /u/1xexpertx1 [link] [comments]

How is it possible that the strong coupling constant is greater than 1? Posted: 21 Apr 2017 11:38 PM PDT I can't wrap my mind around this at all. Basically for strong interactions, the more complex the interaction, the more likely it is to happen. But you can always make an interaction more complex by adding more propagators which make it more likely to happen. Doesn't this make an average strong interaction an infinite order interaction? Does is max out eventually and the probability starts to decrease? submitted by /u/BAOUBA [link] [comments]

What is the difference between kinetic energy and momentum? Posted: 21 Apr 2017 11:32 PM PDT I appreciate they're calculated using different formulas, but I just can't visualise how they're different in my head submitted by /u/light_dude38 [link] [comments]

If light is a transverse wave, shouldn't all observers agree on the direction a travel for a photon? Posted: 22 Apr 2017 01:54 AM PDT In the classic thought experiment that illustrates time dilation, you have 2 mirrors one light second apart. Observer A says "Yup, it takes one second for the light to travel between these mirrors". Observer B says "But wait, from my perspective, Observer A and the mirrors are traveling at .99C! It took like 1.4 seconds by my watch (because the light had to travel one light second, plus the distance that the mirrors moved in that time period), therefore time must be slower for Observer A". My gut tells me that the Observers would NOT agree on the direction the wave was propagating, but I can't understand why. Does the wave appear to vibrate differently to the two Observers? Shouldn't they be able to agree what direction the light was vibrating in and thus be able to say what direction the light "was really going in"? submitted by /u/nightmedic [link] [comments]

Is it a coincidence that the great majority of tectonic plate boundaries are in the ocean? Posted: 21 Apr 2017 02:11 PM PDT Seems odd I guess that there arent continents being torn in half other than a few examples of small areas like California and east Africa. Why aren't there land equivelants to the oceanic ridges, huge mountain ranges of activity and land formation? submitted by /u/nilhaus [link] [comments]

When nucleons join together to form a nucleus the total mass is greater than their individual masses (the mass defect). How is the additional mass distributed between each of the nucleons? Posted: 21 Apr 2017 08:46 PM PDT I understand that when nucleons join energy is converted to mass. But if an elementary proton or neutron has a fixed mass, where is this new, extra mass located? Is it divided up equally? Does it exist between the nucleons like glue? Or does it just hover randomly around the nucleus? submitted by /u/ten_mile_river [link] [comments]

How entangled particles(electrons/photons) are created? And does any natural process is cosmos yield entangled particles? Posted: 21 Apr 2017 12:13 PM PDT submitted by /u/pandhersaab27 [link] [comments]

How does proton-antiproton annihilation work? Posted: 21 Apr 2017 12:51 PM PDT Annihilation (matter-antimatter) made me think. Electron and Positron annihilate producing 2 gamma ray photons. I thought that this concept could also be applied to proton-antiproton annihilation. However, due to the quarks,gluons a proton contains (and the anti-versions of the antiproton), I've been reading different things. Some say that the proton-antiproton annihilation produces only gamma ray photons, some say that other particles like mesons are produced. What is the correct process? (If there is a "correct" process of course) submitted by /u/Tesmkay [link] [comments]

Why can't we (or don't we) connect prosthetics to the nerves of the limb it attaches to? Posted: 21 Apr 2017 01:53 PM PDT So to be more precise. Say someone looses their hand. The nerves controlling the muscles of the hand are still there in the arm. Thus we should be able to connect sensors to these nerves so that when the person tries to move their hand the sensors pick up the signals and send them to the prosthesis. However I've never been able to find any prosthesis that seems to do anything like this. So my conclusion is we cannot do this. Now why is that so? submitted by /u/plebhazard [link] [comments]

Is there a point in history that humans (or our genetic ancestors) became carnivorous? Posted: 21 Apr 2017 11:07 AM PDT submitted by /u/Dr_Mikhail_Arkov [link] [comments]

Are there any remnants of planets in our solar system that existed before our sun? Posted: 21 Apr 2017 11:37 AM PDT How would we know, and how big can they be? How many solar births and deaths have they been through? submitted by /u/frenzyboard [link] [comments]

What is the point of the Bonferroni adjustment? Posted: 21 Apr 2017 09:17 PM PDT Hi guys, I'm currently taking a Stats course and my professor, unfortunately, skimmed over this topic. It seems important seeing as how there are several lecture slides on it, but none of them are making sense with me. Could someone explain the Bonferroni Adjustment's purpose? Why is it useful if it makes it more difficult to reject the null hypothesis? submitted by /u/-Narble- [link] [comments]

[Astronomy] If You Were In the Middle of the Boötes Void, Would You Be Able to See Yourself/Anything or Tell If You Were Moving? Posted: 21 Apr 2017 11:31 AM PDT I'm sitting here at my desk and have had a rush of questions about voids in space... If there's no stars within any reasonable distance - would the space around you be completely pitch black? If so, could a traveler within the void be able to tell if they were moving - if so, moving in respect to what? What would space appear to look like as you began to approach the edge of a void region from its center? Would it be small specks gradually emerging to something like the space we see from earth? Bonus question: I know they're called black holes, but really they're black spheres right? submitted by /u/amchaudhry [link] [comments]

What is most different about the English language today compared to English of George Washington's time, such as that in the Constitution and/or Declaration of Independence? Posted: 21 Apr 2017 07:24 AM PDT submitted by /u/fromRonnie [link] [comments]

How do soundwaves react to temperature? Posted: 21 Apr 2017 09:49 AM PDT Imagine a room that has a microphone and a speaker. The same sound would be played in the same room. The only difference would be a different temperature. Would the microphone pick up exactly the same data? submitted by /u/vallegs [link] [comments]

How do HEAT (High Explosive Anti-Tank) rounds know when they are approaching the target? Posted: 21 Apr 2017 10:47 AM PDT Articles about HEAT tank rounds explain in detail how they manage to penetrate the enemy tanks' armor. But, they never specify the method used to determine the distance to target (which has to be calculated precisely for the round to do its job). So how do they do it? Do they use lasers? Radars? Simple timed fuses? submitted by /u/ApeshitMadMuscovite [link] [comments]

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