- If the coronavirus (sars-cov-2) spreads through aerosols flying out of people's nose/mouth, why do we need a sample from deep inside the nose to detect it instead of just taking a saliva/snot sample from people?
- Why does fire produce light?
- If a tornado is measured on the Enhanced Fujita by damage, how is a tornado in an open field measured?
- Why do antibodies last for different lengths of times for different viruses? (And who controls the length, our bodies or the viruses?)
- If volcanoes are caused by temperature differences in the mantle, why are they not more common in the solar system / universe?
- How is the edge of a galaxy defined?
- Whatever happened to West Nile Virus?
- Is there any theoretical reason why a substance cannot have superconductivity only above a certain temperature, rather than below?
- Does the flu vaccine lose effectiveness gradually once the virus mutates, like the covid vaccine does with the variants? Or does the flu virus mutates so fast they become totally ineffective?
- Read an article about cloud seeding in UAE to help beat the heat. Got me thinking, is it possible to "over seed" clouds and if so what happens then?
- Does hair go grey or grow grey?
- As the radius of a black hole is linearly proportional to its mass, then would a swarm of tiny black holes with the same mass, would take so much less space, what happens if they are brought together close?
- Is the number of magma hot spots permanent?
- What are the differences between mRNA vaccines and the actual virus?
- How does homocysteine actually damage the cell/blood vessels/etc?
- What happens to a person’s oral hygiene while being in a coma?
| Posted: 22 Jul 2021 02:03 AM PDT |
| Posted: 21 Jul 2021 01:37 PM PDT |
| Posted: 21 Jul 2021 05:16 PM PDT Also, could this mean that there are more EF5 tornados in more rural areas that go undocumented? [link] [comments]  |
| Posted: 21 Jul 2021 06:00 PM PDT |
| Posted: 21 Jul 2021 08:34 PM PDT My understanding is that temperature differences cause pieces of the mantle to eat through the crust and once it comes all the way out we call it a volcanic eruption. If that's the case, shouldn't more or less all planets have at least a few volcanoes since it's very unlikely there will be no temperature gradient at all? Similar / possibly same question, why wouldn't just one or a few holes in the crust form early on in the life of a planet, and all "leaks" exit through those holes rather than new ones being created? [link] [comments]  |
| How is the edge of a galaxy defined? Posted: 21 Jul 2021 03:42 PM PDT How do we know when we are "outside" or "inside" a galaxy? What defines the "border" of a galaxy? Also, what's there to be found in the space that doesn't belong to any galaxy? Are there stars or planets in those regions? [link] [comments]  |
| Whatever happened to West Nile Virus? Posted: 21 Jul 2021 05:56 PM PDT I live in the Midwest and several summers ago, the news was filled with reports about West Nile Virus and how dangerous it was. While it's clear the CDC still tracks it, it doesn't get the media attention it once did, and I'm not aware of anyone I know having gotten it — I recognize that's not a scientific measure, but if there was a major disease outbreak, I'd expect to k is at least 2nd hand about someone who got it. So what happened? Did it end up being less of a problem than scientists initially expected? [link] [comments]  |
| Posted: 21 Jul 2021 12:56 PM PDT Specifically, is it possible that some hypothetical, undiscovered substance can be superconductive but only above some temperature, rather than only below one, like all the ones I know of do so far? [link] [comments]  |
| Posted: 21 Jul 2021 07:59 PM PDT |
| Posted: 21 Jul 2021 01:02 PM PDT |
| Does hair go grey or grow grey? Posted: 21 Jul 2021 10:06 AM PDT I've got a long beard, there are some greys in it, I've pulled them all out before so either they are going grey or they are growing much faster than I thought (I think my beard has gotten to it's natural length as I have not perceived extra length in the last year or so, but it never seems to thicken up or anything). I'm just intrigued if the greys are growing out of my face grey or if otherwise coloured hairs are losing their colour? [link] [comments]  |
| Posted: 21 Jul 2021 09:58 AM PDT Using numbers from this page https://en.wikipedia.org/wiki/Schwarzschild_radius The question came from the formula given at the start r = 2GM/c^2, also the Berenstein bound existing. The largest black hole has density of 0.0045 kg/m3 and is bigger than the orbit of pluto. A Sun mass black hole would have density of 1.84×10^19 kg/m3 That is more than 20 orders of magnitude difference. So what if we put enough sun blackholes in the solar system, that would be just a few trillion, few km wide objects, with huge amounts of space to spare in between. Does the new thing suddenly become a black hole, once the critical mass has been reached in space? I assume it would, as otherwise, it would violate the Bekenstein Bound, no? What would the implications of that be, like how would a merger proceed, how would it look like? What if you are in the very center of the solar system, and the black holes fly in exceeding the limit, what happens to you? Also, how (and how fast) would the mass be redistributed? TLDR: How does the universe bend to preserve the Bekenstein Bound/Schwarzschild radius. [link] [comments]  |
| Is the number of magma hot spots permanent? Posted: 21 Jul 2021 11:35 AM PDT |
| What are the differences between mRNA vaccines and the actual virus? Posted: 21 Jul 2021 03:14 PM PDT First off, I want to preface this question by saying I'm in no way shape or form and anti-vaxer, I recently got my second dose and I encourage everyone who hasn't already to do so if they can. So my understanding is that viruses are made up of an RNA delivery system which encapsulates its own RNA. The RNA delivery system acts as a sort of trojan horse letting the RNA into a cell leading it to follow the replication instructions. Now, mRNA vaccines, as I understand them also have those two parts. Lipid nanoparticle for the delivery system and a portion of the actual virus RNA inside. It seems like the mRNA vaccine "infects" cells in a similar way as an actual virus would. It even causes replication and elicits an immune response. So how come the virus causes more severe effects? Is it because of the infinite loop of infection and replication? Can the virus RNA contain harmful instructions other than just replication? On another note, how come we don't form antibodies against the lipid nanoparticle delivery system the same way we do against the spike protein? If our cells are so welcoming to lipid nanoparticles, how come viruses don't use that instead of spike proteins? Is the whole virus RNA too large to fit in a lipid nanoparticle? Thanks in advance! [link] [comments]  |
| How does homocysteine actually damage the cell/blood vessels/etc? Posted: 21 Jul 2021 11:28 AM PDT |
| What happens to a person’s oral hygiene while being in a coma? Posted: 20 Jul 2021 09:45 PM PDT Like does someone come brush their teeth once in a while? [link] [comments]  |
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