- Since the sun's upper atmosphere is hotter than the surface, and we've already sent spacecraft through the upper atmosphere - what is stopping us from sending a spacecraft close to the surface of the sun?
- What part of the brain controls the tail in primates, and does it do anything today in humans?
- How do test-negative case-control studies ensure that they don't just lead to negative tests despite actually being infected and symptomatic?
- Can the principles for binding energy be applied to quarks?
- Can the Miller-Urey Experiment create amino acids and polypeptides?
- Do personalized ads drive the production of physical stuff?
- Is there a difference between Flexflow home tests and PCR tests in terms of accuracy?
- How can a currency be "backed" by something?
- Does the length or shape of a straw change how much force is needed to move a specific amount of air?
- Does the orbital positions of the planets, impact the trajectory of the sun through the galaxy?
- Why are plasmids used for horizontal gene transfer and not chromosomes (bacteria)?
- Is there a "frame rate" for reality? More specifically, is there a point in time where there is no motion whatsoever even at the quantum level?
- How does a salt scrub make the surface of a yoga mat less slippery/more grippy?
- Does vasodilation cause an appreciable change in blood pressure?
| Posted: 20 Feb 2022 04:47 AM PST I assume there are more limiting factors than temperature here - signal interference, high radiation levels, etc. The parker solar probe has travelled into the upper atmosphere of the sun which is, (to my knowledge) even hotter than the surface. Could we theoretically create a probe that would make very close passes to the sun's surface and obtain ultra high-resolution imagery of it? [link] [comments] |
| What part of the brain controls the tail in primates, and does it do anything today in humans? Posted: 20 Feb 2022 08:51 AM PST |
| Posted: 19 Feb 2022 08:40 PM PST In particular, how does one make sure that the vaccine does not simply make detection of the virus more difficult without actually providing increased protection, i.e. you're symptomatic but test negative? [link] [comments] |
| Can the principles for binding energy be applied to quarks? Posted: 20 Feb 2022 07:19 AM PST So in nuclear fission, large atoms are split and part of their binding energy gets turned into kinetic energy. Quarks are held together to form hadrons using the strong nuclear force the same way atomic nuclei are held together, with (from what I've researched) hundreds of times the amount of energy. I know from what we currently understand trying to break the strong nuclear force keeping quarks together is used to create more quarks, but would there theoretically be any way a quarks's chromodynamic binding energy within a nucleon can be released? [link] [comments] |
| Can the Miller-Urey Experiment create amino acids and polypeptides? Posted: 20 Feb 2022 08:06 AM PST I was reading up on Miller-Urdu's results from their experiment earlier and I noticed that while simple organic compounds were listed (eg. Carbonic acids, simple amines, cyanide etc.) there was mention on Wikipedia that repeats of this experiment led to even more complex molecules emerging- but I couldn't find a list of these results. If you recreated Miller-Urey, and maybe added another "stage" to the experiment that mixed these new organic molecules, is it possible for them to form amino acid chains without any human interference? Are there any articles I could read about this if so? [link] [comments] |
| Do personalized ads drive the production of physical stuff? Posted: 20 Feb 2022 05:11 AM PST I recently read a claim in a book stating that data-driven personalized ads drive "uber-consumerism". That got me thinking: what scientific evidence do we have that as a society we consume more (physical) stuff because of personalized ads? There seem to be lots of studies showing that individual companies can increase their revenue by adopting personalization, but is that revenue subtracted from competitors or does personalization actually drive demand? I'd imagine that this must be a difficult thing to study - one can probably find a lot of interesting correlations, but causation will be hard to demonstrate? [link] [comments] |
| Is there a difference between Flexflow home tests and PCR tests in terms of accuracy? Posted: 20 Feb 2022 07:33 AM PST |
| How can a currency be "backed" by something? Posted: 19 Feb 2022 09:12 AM PST How can the value of a piece of paper be intrinsically tied to a given quantity of metal? Suppose I want to start my own currency, let's call it Llamacoin, and tie the value of 1 llamacoin to 1 actual llama. Would I have to keep a number of llamas, somewhere, equal to the number of llamacoins that exist? Would I need to have a system for people to exchange 1 llama for 1 llamacoin at an official exchange? Would I need to continually buy and sell llamas to make their value match the market value of my coin? [link] [comments] |
| Posted: 19 Feb 2022 12:15 PM PST Let's say I've got
Does the force needed to move x air through any of these change? Obviously (I think?) the half inch diameter would have to go slower but would it take more force? [link] [comments] |
| Does the orbital positions of the planets, impact the trajectory of the sun through the galaxy? Posted: 19 Feb 2022 11:16 AM PST For example: would a planetary alignment put enough gravitational drag on the star to move the entire solar system onto a new vector? Edit: I know a dragon won't affect orbital dynamics. [link] [comments] |
| Why are plasmids used for horizontal gene transfer and not chromosomes (bacteria)? Posted: 19 Feb 2022 12:34 PM PST I was curious why bacteria use plasmids to transfer genetic material horizontally and why they don't can't transfer chromosomal DNA? Is there something inherently advantageous about having this "mobile DNA" on a plasmid versus on a chromosome? [link] [comments] |
| Posted: 19 Feb 2022 03:37 AM PST I've read that a zeptosecond is the shortest unit of time measured to this date. Does all motion cease at 0 zeptoseconds or is time like a number line with infinite numbers between each value? [link] [comments] |
| How does a salt scrub make the surface of a yoga mat less slippery/more grippy? Posted: 19 Feb 2022 11:25 AM PST Even though Manduka Pro series yoga mats are top rated and widely popular, many people have trouble breaking them in, complaining that the mats are too slippery. The common explanation is that the manufacturing process leaves a film on the top layer of the mat, and only through repeated use or a salt scrub can the user break down the film. (The method in brief: cover the mat with sea salt, let sit for 24 hours, wipe/scrub off, rinse, and allow to dry.) Can someone explain how this salt scrub method works? ETA: Many people who have tried the salt scrub method report that it does not work, even after repeated attempts. ETA2: Changed flair from Chemistry to Engineering. ETA3: SOLVED: Skip the salt. The film is likely the release agent used in injection moulding. Using a household degreaser (e.g. dish soap, isopropyl alcohol) should remove the film. Alternatively, try a gentle abrasive like 250-400 grit sandpaper. Finally, while I'm still waiting to hear if photodissolution has a scientific basis, all three methods here are supported by anecdotal evidence. [link] [comments] |
| Does vasodilation cause an appreciable change in blood pressure? Posted: 19 Feb 2022 12:20 AM PST I'm a secondary school science teacher in the UK. I'm currently teaching about homeostasis and negative feedback loops (this isn't my specialism). We talked about how when you are warm your blood vessels in your skin dilate to dump heat out of your body. [link] [comments] |
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