Can you kill bacteria just by pressing fingers against each other? How does daily life's mechanical forces interact with microorganisms? |
- Can you kill bacteria just by pressing fingers against each other? How does daily life's mechanical forces interact with microorganisms?
- [Chemistry] When you burn a pan, boiling water with vinegar in it makes it a lot easier to clean up. Why does that happen?
- Would the Higgs Field reaching true vacuum state be catastrophic for us no matter when/where it occurred, or are there distances at which it could happen and its effects never reach us, due to propagating too slowly to overcome the rate of universal expansion?
- If I pop a balloon, does the pressure of the gas at the very center of the balloon drop instantaneously or does it take a short amount of time for the pressure decrease to propagate inwards through the air?
- The “Dark Side of the Moon” stuff is B.S., right?
- Does driving towards a radio transmitter make the song play faster?
- Why is the moon so hammered with comets/meteors/etc but the earth doesn't appear to be nearly as much?
- Is it possible to navigate without GPS and satellites using the earth's geomagnetic field instead (like birds do)?
- If an object that creates light is travelling through space at light speed what happens to the light traveling in the same direction?
- If a person is unconscious from a trauma for several days, is there a way to forcefully wake them up?
- What liquid has the least surface tension?
- What causes people to still feel like they are on a boat/hammock/rocking chair/etc. hours after they are off it?
- As you go down the periodic table, why is the atomic weight no longer exactly twice the atomic number for heavier elements?
- Relations between gluons, Quarks and Anti-quarks?
- What is the big deal with the determinant in linear algebra?
- Is there any other animals that cooks its food?
- Is sound affected by gravity?
- Why do things have smell?
- Do metal pipes, say copper, which have pressure fluctuations over long periods of time, eventually work harden and become more brittle?
- Does net positive suction head work for solids that act like a liquid (i.e. sand)?
- What is the neural correlate of attention?
| Posted: 22 Mar 2019 12:33 AM PDT |
| Posted: 22 Mar 2019 04:20 AM PDT |
| Posted: 22 Mar 2019 01:21 AM PDT I just watched the Kurzgesagt video about the Higgs Field and true vacuum state, and it made me think of a question. I am a writer and linguist, not even remotely close to any kind of a physicist, so please bear with my rudimentary understanding of the concepts. What I want to know is this: if the Higgs Field reached true vacuum state in some vastly distant region of spacetime from our own -- say 30,000 years ago beyond the edge of our galactic supercluster or the edge of our known universe, could it possibly propagate fast enough to cause us or our descendants trouble? If it occurred outside the limits of our known universe, could it even reach us before the heat death of the universe? If so, what would the timeframes look like? If not, would it just be an isolated hole (in our familiar version of the laws of physics) forever? [link] [comments]  |
| Posted: 22 Mar 2019 07:39 AM PDT |
| The “Dark Side of the Moon” stuff is B.S., right? Posted: 22 Mar 2019 06:08 AM PDT You always hear that old myth, "we know more about the dark side of the moon than our own oceans." But I remember learning that the moon doesn't just move around the earth, but it also rotates on its own axis? So no part of the moon is 100% dark 100% of the time? Or did my 5th grade gym coach/ makeshift science teacher have it all wrong? [link] [comments]  |
| Does driving towards a radio transmitter make the song play faster? Posted: 21 Mar 2019 09:40 PM PDT |
| Posted: 22 Mar 2019 04:46 AM PDT I recently viewed the 8K photo of the moon posted here and thought "wow that thing has been hit so many times. It's so close to Earth too. Why haven't we been slammed to that degree?" [link] [comments]  |
| Posted: 22 Mar 2019 07:32 AM PDT I was reading about birds sense of Biomagnetism and was wondering myself if there was a way to use earth's magnetic field to navigate and determine latitude or even longitude. Now, I've heard about Compasses, but it's a little dated technology. Are there sensors around that can measure the geomagnetic field more accurately, making something like a satellite independent navigation system possible? [link] [comments]  |
| Posted: 22 Mar 2019 07:16 AM PDT Does the speed of said object allow for a sort of faster than light "light" (redundant I know) for the light travelling in the same direction or would the energy/light just accumulate on the surface of the object in that direction assuming the speed of light is constant. If the later is the case and that object suddenly stopped how would the release of that energy effect something in front of it? [link] [comments]  |
| Posted: 21 Mar 2019 11:41 PM PDT |
| What liquid has the least surface tension? Posted: 21 Mar 2019 08:54 PM PDT We know that water has the highest surface tension because of it's hydrogen bonds. But what has the least, either in theory or in reality? Google has failed me. [link] [comments]  |
| Posted: 21 Mar 2019 11:23 PM PDT I get the basics of vertigo and BPPV, but what specifically causes people to still have "sea legs" when they lay down at night after a day on the water or a day in the hammock or any kind of repeated gentle oscillation movement generator? [link] [comments]  |
| Posted: 21 Mar 2019 07:39 PM PDT |
| Relations between gluons, Quarks and Anti-quarks? Posted: 22 Mar 2019 06:35 AM PDT I have heard that gluons, which are made up of a colour and an anti-colour, can, at any point, turn into a quark and an anti-quark and vice-versa. But, the mass of a gluon is zero, whereas the mass of an UP quark is 2.4MeV/c² and that of an anti UP quark is also 2.4MeV/c² (not -ve as that would be exotic matter). So, how does this make sense in terms of the law of conservation of energy/mass? [link] [comments]  |
| What is the big deal with the determinant in linear algebra? Posted: 21 Mar 2019 10:16 PM PDT Im taking differential equations and linear algebra for mechanical engineers in university. Im learning this math but Im not quite sure why the determinant is such a big deal? Surely Ill learn but Im curious. [link] [comments]  |
| Is there any other animals that cooks its food? Posted: 21 Mar 2019 06:04 PM PDT |
| Posted: 21 Mar 2019 06:46 PM PDT If it is, is it ever or could it be important to some equation? [link] [comments]  |
| Posted: 21 Mar 2019 10:39 PM PDT |
| Posted: 21 Mar 2019 08:44 PM PDT I was just thinking how pipes have pressure changes all the time and if would make a difference on reusability without reheating and annealing if you wanted to bend old pipes. Or for say power lines, which take wind strain, could they get brittle over time and break? There are some beautiful old copper power lines in Toronto where you can see the green of the copper oxide on them if you look closely, the tar and woven casing long rotted away. I wonder how long they may last. Longer than the wooden posts? [link] [comments]  |
| Does net positive suction head work for solids that act like a liquid (i.e. sand)? Posted: 21 Mar 2019 09:40 PM PDT |
| What is the neural correlate of attention? Posted: 21 Mar 2019 09:31 PM PDT Meditation seems to be all about introspecting conscious experience and a lot of meditation exercises focus on directing attention. Consciousness is a nebulous concept and attention seems like it's more clinical. Have we made any discoveries about how attention manifests in the brain? Can we see a difference when we direct our attention to different things? Do we know how changes in attention are mediated? [link] [comments]  |
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