Is the average human being closer to the size of the entire observable universe or closer to 1 planck lenght? |
- Is the average human being closer to the size of the entire observable universe or closer to 1 planck lenght?
- Do other Great apes pee holding their penises with their hands or is that just humans?
- Is Vitamin D the only essential nutrient we can get from something other than food?
- What's with the Tapir continental distribution?
- What causes weekly trends in Covid19 Death Toll?
- Why is there more head loss in a smaller radius bend than a larger radius bend?
- How old is the arctic's oldest ice?
- How far does lightning spread in a pond, lake, or the ocean? How far do you have to be away to be safe in a large body of water or small for that matter?
- Does water go faster the closer it gets to the drain?
- Is testing someone for COVID-19 immediately after exposure effective?
- What was the population density of T Rexes?
- Why does THC last so much longer in the human body than most other drugs?
- How does electricity heating a filament in a light become photons streaming into my eye?
- Why is precise tracking of satellites difficult?
- How do quantum computers work? How do you read or write data in qubits?
- Do we build up a tolerance to reward chemicals?
- How did we artificially select fruits to grow without seeds? (such mandarine oranges and oranges)
- How does the brain know when it is tired?
- Will it ever be possible to create a direct image of an extrasolar planet in the same way we can view, say, Mars or Jupiter?
- Is there a reason on why Soviet spacecraft was more rounded in design compared to American polygonal or even cube shaped spacecraft?
- How does a polariser filter out certain components of unpolarised light?
- Can blood outside human body generate antibodies when exposed to virus?
- How the phase velocity of de Broglie wave is greater than the velocity of light in free space?
| Posted: 26 Apr 2020 03:27 PM PDT On a scale that ranges from 1 plank lenght to 93 billion light years where would the average human being fall on that scale? would we fall towards the lower end or the upper end of the scale? [link] [comments]  |
| Do other Great apes pee holding their penises with their hands or is that just humans? Posted: 27 Apr 2020 08:22 AM PDT |
| Is Vitamin D the only essential nutrient we can get from something other than food? Posted: 26 Apr 2020 01:53 PM PDT Vitamin D we can get from sunlight. Is there any other essential nutrient we get from the sun or other means aside from eating? [link] [comments]  |
| What's with the Tapir continental distribution? Posted: 27 Apr 2020 07:10 AM PDT I understand there are four species of Tapir, three in South and Central America (the mountain, lowland, and Baird's) and one in Southeast Asia (the Malayan). How did this happen? Do we know on which continent they first evolved?Are they an example of convergent evolution? If not how did a rouge Tapir get to a whole different continent? We're there more widespread populations at one point and these two islands are all that remain? I just want to know how these weirdos got where they are. Thanks! [link] [comments]  |
| What causes weekly trends in Covid19 Death Toll? Posted: 27 Apr 2020 07:21 AM PDT Looking at the data of of daily reported deaths, there is a fairly consistent weekly trend, showing a relative drop in reported deaths on Sunday and Monday. I assume this is due to reporting logistics but seems that could be adjusted by the reporter. So, confusing. Is there a better explanation? [link] [comments]  |
| Why is there more head loss in a smaller radius bend than a larger radius bend? Posted: 27 Apr 2020 08:40 AM PDT It makes sense to me that this happens but I can't explain it [link] [comments]  |
| How old is the arctic's oldest ice? Posted: 27 Apr 2020 06:06 AM PDT I read a lot that the arctic's oldest ice is cracking up or already 95% gone. My question is, how old is this ice though? Do we have an upper limit from the last time the arctic was ice free (if it was)? Do scientists get ice cores from greenland or the north pole like they do from antarctica? Is it stationary or does the ice renew itself, i.e. ice melts and grows in other places so that the ice we see now is not the same as the ice last year/10 years ago/100years ago? [link] [comments]  |
| Posted: 26 Apr 2020 12:54 PM PDT |
| Does water go faster the closer it gets to the drain? Posted: 27 Apr 2020 08:10 AM PDT |
| Is testing someone for COVID-19 immediately after exposure effective? Posted: 27 Apr 2020 07:06 AM PDT Suppose a healthy person was exposed to the virus, and then tested for it that same day (no signs or symptoms showing, and likely within a few hours, or less, of exposure). Would the test still be as reliable as it would be for a person who was exposed, and has been showing symptoms for 48 hours or more? [link] [comments]  |
| What was the population density of T Rexes? Posted: 27 Apr 2020 02:58 AM PDT A question I've always had about them - surely as gigantic apex predators, they would have required a large hunting area to feed themselves, but they also have to be densely populated enough to find other T Rexes and reproduce. Do we know how many T Rexes would have existed across North America, for instance? [link] [comments]  |
| Why does THC last so much longer in the human body than most other drugs? Posted: 27 Apr 2020 12:11 AM PDT |
| How does electricity heating a filament in a light become photons streaming into my eye? Posted: 26 Apr 2020 05:10 PM PDT I started thinking about this last night. After a sleepless night and a significant amount of time trying to figure it out from information on the internet, I'm throwing in the towel and asking: what is the process, from the moment I flip the switch to the time the photons hit the cornea? What particles and forces are involved at what stages? I'm relatively educated for a layperson, but not educated enough to construct the full flow chart: HELP ME GET TO SLEEP TONIGHT! [link] [comments]  |
| Why is precise tracking of satellites difficult? Posted: 27 Apr 2020 01:47 AM PDT I was recently surprised to learn that satellite collisions like this one can happen (albeit rarely), and even more surprised that the satellites involved had actually been projected to pass each other at 584 meters. I'd always assumed that the orbit of any object large enough to see at all was known to an extremely high precision, since it would be governed by very simple forces. I'd like to know which factor is the main bottleneck in our ability to precisely predict the paths of satellites and orbital debris. I can think of a couple of
Are one or more of these responsible? Or is it something else? [link] [comments]  |
| How do quantum computers work? How do you read or write data in qubits? Posted: 26 Apr 2020 08:58 AM PDT I understand the principle behind the working of a quantum computer, but how do they read or write data in qubits? What is the actual mechanism behind it? What actuall happens in the quantum computer? [link] [comments]  |
| Do we build up a tolerance to reward chemicals? Posted: 27 Apr 2020 05:25 AM PDT A little while ago I came across this video on youtube describing somthing called "dopamine detox". If you don't want to watch it yourself the basic idea is that by performing highly exciting/rewarding activities (such as video games, netflix, junk food etc.) too often our bodies become desensitized to our natural reward chemical and thus we require higher doses to feel good. A side effect of this is that not indulging in such activities gives us lower dopamine levels than we're used to and thus make it more difficult to focus on less immediately and intensely rewarding activities such as studying, exercising or practicing a musical instrument. Now to my personal anecdotal evidence. Even before watching this video I had been thinking a lot about my psychological health. More specifically, I believe I "feel less" than I used to. Or rather, it's as if my emotions are dampened. For example, I remember a few years ago when I was 15-16, reading/watching romantic scenes in books and tv series (especially "unexpected first kiss" scenes and similar) would give me these increadible emotional highs. It would feel like an adrenaline explosion in my chest. The first time it happened I remember vividly, and I rode that high for days. Nowadays I'm lucky if a get a small tingle of emotion. It also happens that I have played a lot of computer games since. We're talking thousands of hours. I considered if I was depressed for a while, since I've read that depression can cause similar symptoms, however I haven't displayed any other depression symptoms like agression or anti-social behavior. Could it be that instead of having too low levels of reward chemicals, my body has acclimatized to too high levels like the video describes, or have I simply "outgrown" these powerful emotions after puberty? Is the video "legit" or mostly based on pseudoscience? [link] [comments]  |
| How did we artificially select fruits to grow without seeds? (such mandarine oranges and oranges) Posted: 26 Apr 2020 09:16 PM PDT |
| How does the brain know when it is tired? Posted: 27 Apr 2020 03:14 AM PDT I thought it may work the same as with hunger, but I can't imagine how the brain could measure its energy level. [link] [comments]  |
| Posted: 26 Apr 2020 02:11 PM PDT I know that there has been some amazing images of extrasolar planets, such as those around HR 8799 by the Keck Observatory using motion interpolation. But, is there any possibility of acquiring an image in visual light - so that you could say "It's green" or "It's blue". Thank you! [link] [comments]  |
| Posted: 27 Apr 2020 03:04 AM PDT If you look at Sputnik, the Luna 1 and 2 programs or Soviet landers and satellites you will notice that they all have spheres and cylinders at the Core of their design while American spacecraft had more visible edges like in the Apollo landers and in other satellites. Was that just an aesthetic choice or were there practical reasons behind these designs? And given that rounded spacecraft can't be seen anymore, does that mean that the polygonal design is better? [link] [comments]  |
| How does a polariser filter out certain components of unpolarised light? Posted: 26 Apr 2020 10:59 PM PDT I understand that a polariser has the ability too let light waves of a specific polarisation pass through. My question is how does it blocks out light of other polarisation's? How does the polariser interact with the the light waves? Thanks [link] [comments]  |
| Can blood outside human body generate antibodies when exposed to virus? Posted: 26 Apr 2020 07:05 PM PDT Im sure it's a dumb question: Why can't scientists test vaccines on blood samples in test tubes, without jeopardizing the human donor? If not, what other components from the human body do the blood need to create these antibodies? Can these be components be "externalized" or synthesized? [link] [comments]  |
| How the phase velocity of de Broglie wave is greater than the velocity of light in free space? Posted: 26 Apr 2020 08:47 PM PDT |
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