How would the Chernobyl disaster have appeared to observers at a range of galactic and intergalactic distances? |
- How would the Chernobyl disaster have appeared to observers at a range of galactic and intergalactic distances?
- Did the 1918 pandemic have asymptomatic carriers as the covid 19 pandemic does?
- What do newly-hatched spiderlings or young scorpions eat while they live on their mother's back?
- If a superconductor has 0 resistance, will a current not cause the superconductor to heat up?
- How does the human body pick the right antibody to fight a virus?
- How are we able to have microscopes that use UV light without damaging the specimen?
- Why does the immobilization of enzymes reduce the inhibitory effects that heavy metals have on them (such as catalase)?
- How is palladium and other platinum group metals mined?
- Five million years ago, the Nullarbor plains in Western Australia was a forest, but was a desert before that, just as it is now. What event(s) caused this relatively spontaneous formation of a new ecosystem and relatively quick return back to a desert?
- Why do our eyes handle HDR situations fine (ex. looking own a hall at a bright window) but a camera needs a special mode?
- how can one find linear refractive index, and nonlinear refractive index of amorphous or crystalline materials separately using various refractive index models?
- How many synthetic elements can be made? What’s the process that enables us to make them in the first place?
- How do Ferris wheels like the Singapore Flyer keep the capsule upright throughout the entire ride?
- Why does there need to be a control group when testing a vaccine in phase 3?
- Did the impact that created the moon have a substantial effect on Earth's orbit?
- Can musicians simultaneously draw two different images with each hand (e.g. a circle with their left, a square with their right) better than non-musicians?
- How does the "I am not a robot" checkbox know I'm not a robot?
- What exactly happens when you put Salt on Slugs?
- You know that bit in Finding Nemo where Nemo swims out to touch the boat, leaving the reef and swimming over that big drop? If a person were to swim from the reef over such a drop would they be able to feel a difference, for example is it harder to swim over?
- Before bees existed, how did plants pollinate?
| Posted: 10 Sep 2020 11:05 PM PDT I'm assuming it would not have been detectable at intergalactic, or even medial galactic distances. But if we had had a radio telescope pointed at a similar event on a planet orbiting Alpha Centauri, could we conceivably have caught it? What we we have observed? [link] [comments]  |
| Did the 1918 pandemic have asymptomatic carriers as the covid 19 pandemic does? Posted: 11 Sep 2020 07:29 AM PDT |
| What do newly-hatched spiderlings or young scorpions eat while they live on their mother's back? Posted: 10 Sep 2020 11:05 PM PDT I know that not all arachnids do this, but for the species that do, as in this image, what do their young eat? They don't make milk, obviously; is there some equivalent arthropod secretion that the young feed upon? Do they eat a share of the prey their mothers capture? Do they scatter and hunt for themselves, only returning to the mother for protection? [link] [comments]  |
| If a superconductor has 0 resistance, will a current not cause the superconductor to heat up? Posted: 10 Sep 2020 01:01 PM PDT I'm thinking about how if you have a very high current going through a small wire, the wire heats up and starts to glow orange, but if a superconductor has no resistance, then none of the energy is lost, so no heat would be produced, right? Or am I missing something? [link] [comments]  |
| How does the human body pick the right antibody to fight a virus? Posted: 10 Sep 2020 10:19 PM PDT I was reading about how the immune system and vaccines work to fight viruses that enter the body. When the body isn't vaccinated to a particular virus, you get sick because the T cells are searching for the correct antibody to lock on to the virus's proteins. A vaccine triggers the immune system to start producing those antibodies without exposing the body to the real sickness. My question is- when the body picks the antibody to generate from the "menu" of a trillion (?) unique antibodies, how does it know which antibody to pick? What if the body does not have an existing mapping of the antibody that combats the virus? [link] [comments]  |
| How are we able to have microscopes that use UV light without damaging the specimen? Posted: 11 Sep 2020 07:33 AM PDT |
| Posted: 11 Sep 2020 07:05 AM PDT |
| How is palladium and other platinum group metals mined? Posted: 11 Sep 2020 06:58 AM PDT Hi all, It crossed my attention on how rare the PGMs are and I was curious how they are mined. From what I understand, they are usually a by product of nickel-cooper mines but looking online references are scarce. How does that process work and how is the PGMs separated from the other metals? Also what concentration in the ore does the PGMs need to have for it to be economically viable? I can't imagine there are huge veins of the stuff that are easy to extract. Thanks in advance! [link] [comments]  |
| Posted: 10 Sep 2020 06:46 AM PDT Wondering what could possibly cause a stable desert climate to 'transiently' gain enough water to grow trees for a couple ages just to lose it. Also, was there any other region that became a desert concomitantly during this time? [link] [comments]  |
| Posted: 10 Sep 2020 08:43 AM PDT |
| Posted: 11 Sep 2020 12:53 AM PDT n can be written as, n= n0 + n2(I), where n0 is the linear refractive index and n2 is the nonlinear refractive index, I is the intensity of light. There are different models for finding refractive index: Cauchy's formula, Sellmeier Formula, Lorentz formula, Herzberger Formula, Herve Vandamme Formula, Drude Model, Bruggeman Model, Bragg and Pippard model, Bottcher Formula....so how can one find linear refractive index, and nonlinear refractive index separately using these models? [link] [comments]  |
| Posted: 10 Sep 2020 10:59 PM PDT |
| How do Ferris wheels like the Singapore Flyer keep the capsule upright throughout the entire ride? Posted: 10 Sep 2020 09:01 PM PDT |
| Why does there need to be a control group when testing a vaccine in phase 3? Posted: 10 Sep 2020 08:57 PM PDT I'm not trying to be contentious or argumentative here, but I asked this same question in a similar thread and didn't get a very satisfactory answer. I work in statistics, and am genuinely curious here if someone who has does both a medical and a statistics background can comment? Without making you kind people click that link, I am wondering why there needs to be a control group when studying whether a vaccine works or not, and if so why it needs to be 50% and not something like 10%. From my own experience in statistics neither of these things really seem to make a lot of sense to me. I fully understand why a control group is necessary when testing a treatment, but there you have a population that is sick, and you are testing ways to treat their sickness. Here you have a population of people that aren't sick, and are testing to see if a drug will prevent them from getting sick. It would almost seem more statistically relevant to me to not even have a control group and then look to see who in that population ended up getting sick. Last point which was brought up in the previous thread is that I can grasp the idea of getting some good data when comparing whether or not someone gets sick or experiences mild symptoms when injected with the vaccine, or a placebo, but isn't that completely irrelevant by phase 3? Maybe this is where I'm going off the reservation, but if that is the only reason for the control group then wouldn't 10% be sufficient, or couldn't you compare the % of people who do experience mild symptoms with other types of drugs to see if it is within an acceptable variance? I'm part of a COVID trial (Pfizer) and was chatting with one of the people involved, and she reckoned it was more a product of archaic FDA regulations and practices that might not be statistically necessary, but similarly to the other person I was chatting with in the above thread went on to say that she was not particularly familiar with statistics... so here I am. :) Thank you. [link] [comments]  |
| Did the impact that created the moon have a substantial effect on Earth's orbit? Posted: 10 Sep 2020 02:21 PM PDT I've read that the existence of the moon itself stabilizes Earth's orbit and makes the planet more hospitable to life, but I was wondering more about the impact itself. Do we know if there was a meaningful change to Earth's orbit after the collision? [link] [comments]  |
| Posted: 10 Sep 2020 06:48 AM PDT In a lecture we watched a video about a split-brain patient, and it showed that they were perfectly able to simultaneously draw a circle with one hand, and a square with the other, without looking at them. When the show's host try to do the same, they were unable to do it. The question is then whether musicians, especially people who played instruments like the harp or the piano, would perform better at this task, since they have had extensive training in performing different movements with their hands simultaneously. [link] [comments]  |
| How does the "I am not a robot" checkbox know I'm not a robot? Posted: 10 Sep 2020 03:24 PM PDT |
| What exactly happens when you put Salt on Slugs? Posted: 10 Sep 2020 07:06 PM PDT Im sorry for the stupid question but how exactly does salt kill the slugs? They shrivel up after and dissolve and how does that work exactly? Are slugs composed mainly of water? Are their skins very permeable since exposure to salt causes them to shrivel up otherwise if their skin weren't that thin, the water from their insides wouldn't get sucked out. Sorry for the stupid question, my girlfriend and I have been debating about this for 3 days now. [link] [comments]  |
| Posted: 10 Sep 2020 05:27 AM PDT |
| Before bees existed, how did plants pollinate? Posted: 09 Sep 2020 10:25 PM PDT |
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