- [Physics] Is the reason why particles of different gases will sort themselves heaviest/lightest the same mechanism that causes (eg) sugar grains and the larger coffee granules to separate themselves in a cup?
- Why is ω+1 not the same as 1+ω?
- When and why did the English accent in early America fade away, and the American accents come about?
- Why can noise cancelling headphones only cancel at low freqs?
- Microwaves and radiowaves, how do they penetrate different material?
- How does the blood test for food allergies work?
- Why can green, red, and blue alone be used and combined to make every visible color, like on screens? Are there other combinations of colors that can do this?
- Is there a way to shift EM signal frequencies?
- How do blood/plasma recipients not get serious viral infections?
- When human waste is dumped into the ocean (from ships or drainage) does it not just get diluted and diffused?
- [Physics] Do fields actually exist?
- Is the "observable universe" limited by our current telescopic technology, or can we see that far and there's nothing behind it?
- Is baby babbling a component in word origins and etymology?
- What's the deal with converting between Gibbs free energy changes and equilibrium constants?
- Why are some gases, such as CO2, highly lipid soluble, while some others, such as N2 or Argon are less?
- If addition an subtraction, as well as division and multiplication, are related to each other as inverse operations, are there names for each "group" of operations?
- [physics]?If I was standing on the surface of the sun and looked up what would I see in the sky? Would it be different if I was in an Earth sized sun spot?
- Are blood transfusions between species possible?
- How fast can the human eye move?
- What happens if you repeatedly melt glass?
- Does light slow down when traveling through a medium?
- Physicists have transmitted data via quantum entanglement. Shouldn't this be huge news?
| Posted: 13 Jul 2017 05:03 AM PDT Can someone explain why the larger particles and smaller ones will sort themselves apart and is that the same reason why it happens at a larger scale with different sized bits of matter eg if you put sugar grains and coffee granules in a cup and shake it they will separate themselves. Are these two situations connected at all? By what mechanism do they happen? [link] [comments]  |
| Why is ω+1 not the same as 1+ω? Posted: 12 Jul 2017 10:44 PM PDT |
| When and why did the English accent in early America fade away, and the American accents come about? Posted: 13 Jul 2017 05:54 AM PDT |
| Why can noise cancelling headphones only cancel at low freqs? Posted: 13 Jul 2017 04:05 AM PDT Can anyone explain why exactly noise cancelling headphones are only able to cancel reasonably low frequency sounds? Is it more of a practical limitation or a scientific limitation? Bonus: Is it at all related to why low frequencies tend to travel through walls, while higher frequencies do not? [link] [comments]  |
| Microwaves and radiowaves, how do they penetrate different material? Posted: 13 Jul 2017 05:45 AM PDT I was curious at how microwaves dont pass through the metal mesh on the window, I understood this was due to wavelength but it didnt make sense how the waves just can just slide throughthe holes until I read that one should imagine the wavelength doesnt form in one direction but in all like a blob, so the long wavelength disallows it from passing through. That is until I was curious how radiowaves can pass through walls and small bits of earth when they have wavelengths much longer than that of microwaves. Also how would microwaves penetrate food? Or do they simply heat from the outside? I did slme reading but nothing seems to click or make sense, is there some kind of sweet spot between wave speed and wavelength? I havw no background in optics or whatever physics concentration this is, I am simply curious. [link] [comments]  |
| How does the blood test for food allergies work? Posted: 13 Jul 2017 05:39 AM PDT |
| Posted: 12 Jul 2017 04:32 PM PDT |
| Is there a way to shift EM signal frequencies? Posted: 13 Jul 2017 03:41 AM PDT Say can we shift IR to visible frequencies without receiving it on an IR sensor, reading it and reemitting it? [link] [comments]  |
| How do blood/plasma recipients not get serious viral infections? Posted: 13 Jul 2017 06:52 AM PDT If a patient receives whole blood or plasma from a donor, wouldn't viruses like chicken pox, influenza, or even HSV be transmissible via the serum? Even if the original donor has acquired immunity, the recipient's adaptive immune system is not producing T-Cells with the proper antigen receptors. Since many blood/plasma recipients are already immunocompromised, how do they avoid getting horribly sick from latent or active viral infections from the blood they receive? [link] [comments]  |
| Posted: 13 Jul 2017 02:07 AM PDT Currently revisiting oceanography and global governance as part of Geography subject knowledge, and just interested in how significant human waste in the ocean is and whether or not it is simply diffused and diluted through the sheer volume of water or salinity [link] [comments]  |
| [Physics] Do fields actually exist? Posted: 12 Jul 2017 08:08 PM PDT Take the electromagnetic field, for instance. Photons are quantized, meaning that it takes a threshold energy level for the photon to even exist. On the other hand, photons are excitations of the electromagnetic field. Putting these two ideas crudely together: if there's no photon, then that means there's no excitation in the field. So if that is true, then how could you distinguish the field from nothingness? To put it differently, do fields exist independently from their particles? [link] [comments]  |
| Posted: 12 Jul 2017 12:59 PM PDT |
| Is baby babbling a component in word origins and etymology? Posted: 13 Jul 2017 04:59 AM PDT Ok, the premise of this questions gonna sound weird (really weird) but my question is genuine. Tonight I dreamed about a late night academic presentation about a study where the researchers were able to record some vocalisations of unborn pandas(!?!) (I don't even know if they make noise). One of this sound was really similar to "mama". So they theorised that we use a sound similar to "mama" and "papa" for mom and dad in many languages because it's actually one of the youngest and easiest sound human could make... Then I dreamed that to find more info on the study I had to go in a library/dungeon and battle some goblins... But that's a dream for another time. So, is my subconscious actually onto something? Could have the baby babbling (the various "dadada" and "bababa"), which is most probably done in front of parents, influenced the way we say mom and dad (if not etymologically, at least phonetically) and not the other way around? Also, is the babbling the baby makes more influenced by biological factors or is more embedded in the cultural environment the baby is born to? I don't know for other branches, but in almosts all Indo-European languages there are expressions very similar to refer, in a "childish" way to the parents, namely "mama" or "papa"/"dada". Do I dream in academic research or just random weird stuff??? [link] [comments]  |
| What's the deal with converting between Gibbs free energy changes and equilibrium constants? Posted: 13 Jul 2017 04:49 AM PDT I'm familiar with the equation deltaG = -RTln(K), but I have never really seen it specified whether this is a K_c or a K_p value. This is kinda important... since they're different numbers and both are unitless. What one is it??! And why does nobody specify this? [link] [comments]  |
| Posted: 13 Jul 2017 03:40 AM PDT |
| Posted: 12 Jul 2017 04:05 PM PDT Example: (exponent/root operations are called "..." operations). [link] [comments]  |
| Posted: 12 Jul 2017 03:11 PM PDT |
| Are blood transfusions between species possible? Posted: 12 Jul 2017 09:49 AM PDT |
| How fast can the human eye move? Posted: 12 Jul 2017 12:02 PM PDT |
| What happens if you repeatedly melt glass? Posted: 12 Jul 2017 10:03 AM PDT If you have glass and you melt it, then allow it to cool and harden, then melt it again and repeat a few times, will the glass become brittle? What change will happen to the glass? [link] [comments]  |
| Does light slow down when traveling through a medium? Posted: 12 Jul 2017 03:59 PM PDT I was under the impression that light can only ever travel at the speed of light. How does index of refraction factor into this? [link] [comments]  |
| Physicists have transmitted data via quantum entanglement. Shouldn't this be huge news? Posted: 12 Jul 2017 10:28 AM PDT https://phys.org/news/2017-07-physicists-transmit-earth-to-space-quantum-entanglement.html This seems like a monumental achievement. This potentially opens the door for instantaneous communication and data transfer with no spacial limitations, wires, etc. Data transfer via quantum entanglement could have incredible implications for computation as well. My mind is racing, why is there so little buzz surrounding this achievement? [link] [comments]  |
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